Thornton, Colorado, USA
UpdatedSun, 15-Sep-2019 6:25pm MDT 


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Thornton’s Wednesday to offer near normal temps, scattered PM thunderstorms and showers

Wednesday, April 3rd, 2019 5:20am MDT

Our weather today looks a good bit like yesterday. Temperatures will be similar with a good bit of cloud cover but we do see a bit better chance for some afternoon and evening precipitation.

Mostly cloudy skies start us off and will be with us throughout the day thanks to a good bit of mid-level moisture. Winds will be relatively light and out of the northeast. Temperatures will top out right near the 60 degree mark.

Some scattered shower and thunderstorm activity is expected this afternoon into the evening. Our best chances will come from about 3:00pm to 7:00pm. If we do see some activity, it isn’t expected to amount to much.

Tonight, cloud cover will gradually ease with overnight lows expected to drop to the mid-30s.

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Seasonal temperatures, a chance for a late day rain shower Tuesday

Tuesday, April 2nd, 2019 4:55am MDT

A weak disturbance will be moving through today serving up a good bit of cloud cover but temperatures will be staying near normal. There is a chance for us to see a rain shower this evening.

The day starts with mostly cloudy skies and similar coverage can be expected throughout the day. Winds will be light and out of the north then the northeast in the afternoon. Look for temperatures to top out today in the upper 50s.

This evening brings us a chance for a light rain shower, mainly from about 6:00pm to midnight.

Tonight, skies remain mostly cloudy with overnight lows in the upper 30s.

Keep an eye out for those showers with our interactive radar here.

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March 2019 weather recap: Another cold, wet month in the books

Monday, April 1st, 2019 10:10am MDT

The unstable, cold and wet weather that marked February continued right on into March. Once again, we saw temperatures well below normal and a good bit more than average precipitation.

While the first day of the month started things off relatively nicely, the second brought the first bout of cold. Temperatures plummeted with highs on the third only in the single digits and nighttime low temperatures below zero on the 3rd and 4th. This was coupled with a nice shot of 3.4 inches of snow on the 3rd.

We then slowly warmed up and enjoyed near normal temperatures for a brief period of time. This changed quickly and significantly with the arrival of a blizzard on the 13th. Powerful winds coupled with snow shut down schools, businesses, highways and Denver International Airport.

Calmer, drier weather then took hold for much of the rest of the month although most days continued to see temperatures below normal. The 26th and 27th did offer up our first days of 70 degree or warmer temperatures.

The month closed out with another shot of cold on the 29th and 30th and a light bit of snow.

Thornton’s overall average temperature for the month of March was 35.1 degrees. Out at Denver International Airport here the Mile High City’s official measurements are taken, they matched our temperature with an average of 35.1 degrees as well. Both were well below the historical average March temperature for Denver of 40.4 degrees.

Temperatures in Thornton ranged from a maximum reading of 74.9 degrees on the 27th down to a low of -5.0 degrees on the morning of the 4th. Denver saw its maximum of 73 degrees on the 27th and its minimum of -6 degrees on the 3rd.

Denver set a record low maximum for March 3rd when the temperature only reached a high of 6 degrees. The old record was 14 degrees set in 1978. Additionally, a low temperature reading of -3 degrees on the 4th tied the record low for the date also set in 1960 and 1978.

In terms of precipitation, Thornton recorded 1.19 inches in our bucket while Denver bested us with 1.39 inches. Both were above the long term Denver average for the month of March of 0.92 inches.

Denver’s 0.64 inches of liquid precipitation on the 13th set a daily record, easily besting the old record of 0.43 inches (1926) for the date.

Denver averages 10.7 inches of snow during the month of March. Thornton and Denver beat the average with measurements of 12.2 inches and 12.9 inches respectively.

Click here to view Thornton’s March 2019 climate report.

Thornton, Colorado's March 2019 temperature summary. (ThorntonWeather.com)

Thornton, Colorado’s March 2019 temperature summary. (ThorntonWeather.com)

Thornton, Colorado's March 2019 precipitation summary. (ThorntonWeather.com)

Thornton, Colorado’s March 2019 precipitation summary. (ThorntonWeather.com)

938 AM MDT MON APR 1 2019




                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
 HIGH              84   03/26/1971
 LOW              -11   03/28/1886
HIGHEST            73   03/27                         73  03/22
LOWEST             -6   03/03                         13  03/07
AVG. MAXIMUM     46.7              54.4    -7.7     58.5
AVG. MINIMUM     23.5              26.4    -2.9     26.8
MEAN             35.1              40.4    -5.3     42.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      3               1.9     1.1        0
DAYS MIN <= 32     28              23.6     4.4       27
DAYS MIN <= 0       3               0.1     2.9        0

 MAXIMUM         4.56   1983
 MINIMUM         0.03   2012
TOTALS           1.39              0.92    0.47     1.02
DAILY AVG.       0.04              0.03    0.01     0.03
DAYS >= .01         9               5.9     3.1        6
DAYS >= .10         6               2.4     3.6        3
DAYS >= .50         1               0.3     0.7        0
DAYS >= 1.00        0               0.1    -0.1        0
 24 HR. TOTAL    0.64   03/13 TO 03/13           03/18 TO 03/18

 TOTAL           12.9              10.7
RECORD MARCH     35.2    2003

HEATING TOTAL     919               763     156      684
 SINCE 7/1       5336              5202     134     4741
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0

 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05

AVERAGE WIND SPEED              10.2

AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             16


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Thornton’s workweek starts with seasonal temperatures, calm conditions

Monday, April 1st, 2019 5:03am MDT

Monday will offer up some pretty nice weather for us. Temperatures will be right near normal with just a bit of cloud cover and some slightly breezy winds.

Clear skies start us off and then moisture aloft will increase bringing in some cloud cover for the balance of the day. Overall though, mostly sunny skies should be the rule.

Winds will be calm initially then become just a little bit breezy in the afternoon but nothing too strong or annoying. Highs today will top out right near the average high for today’s date of 58 degrees.

Tonight, mostly cloudy skies will be above with lows dropping close to freezing.

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Thornton’s April 2019 weather preview: Three seasons wrapped into one

Monday, April 1st, 2019 3:04am MDT

Thornton's April weather previewApril marks a transition between winter and summer for most of the country but for Denver it is especially true as we can see a stunning variety of weather.

The proverbial April showers are certainly a possibility for Denver. Snow? Tornadoes? Thunderstorms? You bet – all can happen!

For good measure throw in a chance for hail and even dust storms and April gives every type of weather condition you could like – or hate.

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March 31 to April 6: This Week in Denver Weather History

Saturday, March 30th, 2019 8:05pm MDT
This week in Denver weather history

March 31 to April 6: This Week in Denver Weather History

Early spring can bring a wide variety of conditions from wintry storms to severe weather. Our look back at this week in Denver weather history shows that just about any type of weather condition can occur this time of year.

From the National Weather Service:


In 1970…snowfall totaled 6.0 inches at Stapleton International Airport. Heavy snow accumulation in Boulder on the 29th caused the collapse of a carport at an apartment building…damaging 11 automobiles. Northeast winds gusted to 24 mph at Stapleton International Airport.


In 1896…heavy snowfall totaled 7.5 inches in downtown Denver. Northwest winds gusted to 26 mph.

In 1897…rain changed to snow during the early morning of the 30th and totaled 6.2 inches before ending during the late morning of the 31st. Northwest winds were sustained to 35 mph with gusts to 46 mph.

In 1929…heavy snowfall of 7.0 inches was recorded over downtown Denver. Northwest winds were sustained to 23 mph on the 30th.

In 1953…heavy snowfall totaled 8.6 inches at Stapleton Airport where northeast winds gusted to 23 mph.

In 1955…a vigorous cold front produced north winds at 40 mph with gusts as high as 54 mph at Stapleton Airport. Rain and snow showers and blowing dust accompanied the front. Snowfall totaled only 0.1 inch at Stapleton Airport on the 31st.

In 1988…snow began falling on the afternoon of the 30th and continued through the 31st…burying metro Denver. Twelve to 18 inches of snow fell in the foothills to the west of Denver and Boulder with 6 to 12 inches across the rest of metro Denver. The storm disrupted aircraft operations at Stapleton International Airport where snowfall totaled 7.1 inches and north winds gusting to 32 mph reduced the visibility to less than 1/4 mile at times…causing air traffic delays of 2 to 3 hours.

In 2000…heavy snow once again developed over the foothills and the higher terrain to the south of metro Denver. Snowfall totals from the storm included: 16 inches atop Squaw Mountain…15 inches near Rollinsville…13 inches near Evergreen…12 inches near Morrison…11 inches in Coal Creek Canyon…10 inches near Blackhawk and in Eldorado Springs…9 inches at Ken Caryl Ranch and Larkspur… And 8 inches near Elizabeth. Snowfall totaled only 4.1 inches at the site of the former Stapleton International Airport. North winds gusted to 32 mph at Denver International Airport on the 30th.

In 2005…a strong spring storm intensified over the eastern plains of Colorado and produced near-blizzard conditions to the east and southeast of Denver overnight. North to northwest winds from 20 to 35 mph with gusts to 50 mph produced extensive blowing snow and caused near zero visibilities at times and snow drifts from 2 to 4 feet in depth. Snowfall amounts included: 12 inches near Bennett…8 inches around Castle Rock… 7 inches near Sedalia…and 6 inches near Parker. Only 0.3 inch of snow was reported at Denver Stapleton. At Denver International Airport…north winds gusted to 37 mph on the 30th and 36 mph on the 31st.

In 2014…on the evening of the 30th…high based showers and thunderstorms produced microburst winds over northern Jefferson…eastern Boulder and southwest Weld Counties. Peak wind reports included: 77 mph at White Ranch Open Space; 72 mph…2 miles north of Longmont; 67 mph near Erie and Firestone; 60 mph near Mead and 59 mph…5 miles northwest of Henderson; with 53 mph at Denver International Airport. The wind downed power lines in Weld County which sparked a small fire. High winds then developed in the Front Range Foothills and Urban Corridor through the morning of the 31st. Peak wind gusts included: 98 mph near Gold Hill; 77 mph near Eldorado Springs; 61 mph at Centennial Airport; 59 mph at Buckley Air Force; with 44 mph at Denver International Airport.


In 1873…high winds damaged buildings in the city. Northwest winds with sustained velocities to near 40 mph blew from 9:00 am until sunset.

In 1937…north to northeast winds sustained to 25 mph with gusts to 32 mph produced a light dust storm in the city during the afternoon.

In 1971…wind gusts to 92 mph were recorded in the south hills area of Boulder. At the National Bureau of Standards in Boulder sustained winds of 46 mph with gusts to 83 mph were measured. Damage was minor. Northwest winds gusted to 41 mph at Stapleton International Airport.

In 1983…high winds with gusts to 70 mph in Boulder caused minor damage.


In 1876…heavy snow began during the night and lasted all day on the 31st and through the morning of the 1st. The average depth of snow fall was 10 to 12 inches…but strong winds whipped the snow into drifts of 8 to 10 feet deep on the streets of the city. Precipitation from the storm was 1.03 inches on the 31st and 0.37 inch on the 1st.

In 1891…heavy moist snowfall totaled 18.0 inches in the city. Northeast winds were sustained to 20 mph with gusts to 24 mph on the 31st.

In 1936…northeast winds sustained to 21 mph produced a light dust storm in the city.

In 1975…a major storm dumped 9.3 inches of snowfall at Stapleton International Airport where northwest winds gusted to 41 mph. Rain changed to snow on the afternoon of the 31st…reducing the visibility to as low as 1/8 mile. Snow continued all day on the 1st and accumulated to a depth of 8 inches on the ground. The minimum temperature of 10 degrees on the 1st set a new record low for the date.


In 1980…the second major blizzard in 5 days buried much of eastern Colorado under 6 to 12 inches of snow. Some drifts were up to 22 feet high. Hundreds of travelers were stranded. Over 3000 families were without power. Livestock losses were high. Metro Denver escaped the main brunt of this storm. At Stapleton International Airport…only 6.3 inches of snow fell over the 3-day period and north winds gusted to only 22 mph on the 1st.


In 1979…total snowfall of 6.6 inches was measured at Stapleton International Airport where north winds gusted to 31 mph on the 31st. The greatest accumulation of snow on the ground was 3 inches on the 1st.


In 1905…much rain and some snow occurred over the 5 days behind an apparent cold front. Precipitation totaled 2.00 inches. There was a thunderstorm on the 3rd. Snowfall totaled 3.0 inches on the 4th. North winds were sustained to 34 mph on the 1st and 2nd and to 30 mph on the 3rd. High temperatures during the period ranged from the upper 30’s to the lower 40’s. Low temperatures were in the upper 20’s and lower 30’s.

» Click here to read the rest of March 31 to April 6: This Week in Denver Weather History

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Unsettled weather for Thornton’s weekend with cooler temps, periods of precipitation

Friday, March 29th, 2019 5:16am MDT

We hope you enjoyed the few days of warmer weather we just had as things are not going to be quite the same this weekend. A series of disturbances are going to keep things cooler and bring some rain, perhaps snow.

For Friday, drizzle and fog get us started. Mostly cloudy skies will be above for much of the day. Scattered, light rain showers will be seen this afternoon and evening. Highs today will be in the upper 40s.

This evening, as temperatures drop, we should see the precipitation change over to light snow and continue overnight. Tomorrow morning we may wake up to an inch or two of the white stuff on grassy areas. Overnight lows tonight will be in the mid-20s.

Saturday morning any lingering showers will be easy and should be done entirely by late morning. Some clearing will be seen but overall mostly cloudy skies will be above. Highs tomorrow will only be around 40 degrees.

Saturday night into Sunday morning, mostly cloudy skies will be above with lows in the mid-20s.

Sunday should be the calmest day of the three day period. Mostly sunny skies will be above with highs in the mid to upper 40s. Models are not entirely in agreement however with one wanting to bring another disturbance with precipitation through to close the weekend out.

Have a great weekend and keep an eye on our interactive weather radar to watch for the showers.

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March 2019 top shots: Monthly photo slideshow

Thursday, March 28th, 2019 4:45pm MDT
A bald eagle takes flight over Adams County. (Bill Hutchinson)

A bald eagle takes flight over Adams County. (Bill Hutchinson)

The month of March is the start of meteorological spring and while conditions do begin warming, winter weather is certainly out of the question.  From hot to cold, snow to rain, the conditions can be very conducive to great pictures as we see in our slideshow.

March in Denver typically means frequent and rapid weather changes. The days grow longer and we start enjoying more sunshine and sometimes summer-like weather. However, on occasion arctic air masses can still force their way south into Colorado dropping temperatures quickly and markedly.

With the active wildlife, increased outdoor activities by us humans, and of course the weather, March imagery contains a wide variety of subjects and extremes.

  • Slideshow updated March 28, 2019. To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather-related imagery.

Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted in images captured from yours and our cameras.

What is missing in the slideshow above?  Your photo!

Our monthly photo slideshow is going to feature images that we have taken but more importantly images that you have captured.  The photos can be of anything even remotely weather-related.

Landscapes, current conditions, wildlife, pets, kids.  Whimsical, newsy, artsy.  Taken at the zoo, some other area attraction, a local park, a national park or your backyard.  You name it, we want to see and share it!

Images can be taken in Thornton, Denver or anywhere across the extraordinary Centennial State.  We’ll even take some from out of state if we can tie it to Colorado somehow.

We’ll keep the criteria very open to interpretation with just about any image eligible to be shown in our slideshows.

What do you win for having your image in our slideshow?  We are just a ‘mom and pop’ outfit and make no money from our site so we really don’t have the means to provide prizes.  However you will have our undying gratitude and the satisfaction that your images are shared on the most popular website in Thornton.

To share you images with us and get them included in the slideshow just email them to us or share them with ThorntonWeather.com on any of the various social media outlets.  Links are provided below.

So come on, get those camera’s rolling!

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Cooler temperatures, a slight chance for showers for Thornton’s Thursday.

Thursday, March 28th, 2019 5:00am MDT

A weak cold front is going to mix things up and cool things down today. Temperatures will still be above normal but not as warm as the past two days and the evening and overnight hours may bring some rain.

The day starts with mostly clear skies. After mid-morning, cloud cover will increase a bit but we should still be seeing some sun. Temperatures will top out around 67 degrees.

From late afternoon through the night some isolated shower activity will be possible. We do not expect this to be widespread or really amount to much.

Tonight, mostly cloudy skies will be above with lows dropping to the upper 30s.

You can keep an eye out for any shower activity with our interactive #weather radar here.

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A warm Wednesday for Thornton as temperatures climb again

Wednesday, March 27th, 2019 5:04am MDT

Yesterday we saw our first 70 degree day of the year (finally!) and today we will see our second. While there will be more cloud cover above, we should improve on yesterday’s reading by a few degrees.

Moisture aloft will lead to partly sunny skies throughout the day today. Winds will be light and out of the southwest shifting to the southeast in the afternoon.

Temperatures start out relatively mild this morning aiding in us reaching a high in the mid-70s. The average high for today’s date is 57 degrees so we will easily beat that.

Tonight, skies remain partly clear with lows dipping to the low 40s.

How warm is it now? Check out our live weather gauges here.

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