Thornton, Colorado, USA
UpdatedSun, 24-Mar-2019 10:10pm MDT 


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The snow moves out and blue skies return but temps remain cloudy for Thornton’s Monday

Monday, November 12th, 2018 5:14am MDT

That is a wrap on our first snowfall of November with Thornton netting a total of 4.1 inches. Today, that system moves out and we will see skies clear but the cold is going to linger.

Partly sunny skies start things out with clouds easing through the morning leading to mostly sunny skies this afternoon. Temperatures in the teens are greeting you early then we warm up, some, to a high today right near the freezing mark.

Tonight, mostly clear skies will be above with lows again dipping to the teens.

Warmer weather lies in wait through as the balance of the workweek should be pretty nice. Check out the extended weather forecast here.

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Thornton’s weekend weather to start off warmer, end colder with snow

Friday, November 9th, 2018 5:05am MDT

Looking at the forecast for the next three days, on the plus side, we will see warmer, dry conditions Friday and Saturday. Veterans Day however turns much colder and brings a decent chance for snow.

For today, sunny skies will be the rule throughout the day. Temperatures start out quite cold but should warm up nicely with a high in the mid-40s. Tonight partly cloudy skies will be above with lows dipping to around 20 degrees.

Saturday will be the warmest day of the period with highs in the mid-50s. We will have some clouds above but should still be clear enough to call for mostly sunny skies. The next storm system arrives Saturday night.

Temperatures overnight Saturday into Sunday will dip to the mid-20s under mostly cloudy skies. By dawn Sunday, we could be seeing a few flakes of snow.

Cloudy skies will be the rule on Veterans Day with a high temperature only near freezing. Light snow will be possible throughout the day with the best chances coming in the afternoon. Right now, an inch or so seems to be possible. Snow will end overnight Sunday night and skies will begin to clear.

Have a great weekend and thank you all our nation’s veterans – we are forever in your debt!

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Thornton’s Thursday weather to offer up chilly temperatures, some breezy winds

Thursday, November 8th, 2018 5:05am MDT

Our latest disturbance has moved through and with it ushered in some chilly temperatures. We will be dry today but do expect a bit of wind.

The day starts off with a good bit of cloud cover but that will begin to ease early leading to mostly sunny skies by late morning and lasting through the rest of the day.

High temperatures today will be topping out only around 40 degrees. Some breezy winds can be expected from late morning through the first part of the afternoon making it feeler colder than what the thermometer might say.

Tonight, skies will be mostly clear with temperatures dropping to the upper teens.

Want a sneak peek at the coming weekend’s weather? See here.

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Colder temperatures, less wind for Thornton’s Wednesday

Wednesday, November 7th, 2018 4:56am MDT

With the passing of a cold front late yesterday, we cool down quite a bit today. There will, thankfully, be less wind though.

Partly cloudy skies will be above throughout the day, perhaps a bit easing in coverage for a few hours later this morning before increasing again. Temperatures today will top out in the low to mid-40s, well below the average for the date of 56 degrees.

From this evening through the early morning tomorrow we do have just a slight chance to see some snow. However, even if some does fall, it isn’t expect to amount to anything appreciable. Overnight lows tonight will drop to the mid-20s.

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November 4 to November 10: This week in Denver weather history

Tuesday, November 6th, 2018 6:02am MDT
This week in Denver weather history

November 4 to November 10: This week in Denver weather history

Our look back at this week in Denver weather history is shorter than what we often see which shows the normally quiet weather we see in November. However there are still significant weather events in the past, most of which involved heavy snow and powerful winds.

From the National Weather Service:


In 1946…a major snow storm dumped 30.4 inches of heavy snowfall downtown and 31.0 inches at Stapleton Airport. The winter storm closed schools and disrupted all forms of transportation in the city. The greatest depth of snow on the ground was 28 inches at the airport. The duration of the snowfall…from 4:22 am on the 2nd to 3:08 am on the 5th… A total of 70 hours and 46 minutes…is the second longest period of continuous precipitation on record and the second heaviest snowfall of record at the time in Denver. The 17.7 inches of snowfall on the 2nd and 3rd was the greatest 24- hour snowfall ever recorded during the month of November. Buses and street cars had a difficult time…and many cars were abandoned along roadsides and streets for several days. Secondary roads in rural areas were blocked for 2 to 3 weeks. Several buildings in the city collapsed or were damaged from the weight of the heavy snow. Football games were canceled. Livestock losses were high over eastern Colorado. The precipitation from this storm alone exceeded the greatest amount ever recorded in Denver during the entire month of November previously. The precipitation recorded downtown was 2.03 inches…and the previous record for the entire month of November was 1.95 inches in 1922. North winds were sustained to 26 mph on the 2nd.


In 1994…a fast moving snow storm dumped 8 to 9 inches of snow on Boulder…Broomfield…and Lafayette. Snowfall totaled only 1.8 inches at Stapleton International Airport where on the 3rd east winds gusted to 20 mph and some freezing drizzle fell.


In 1940…a trace of snow fell in downtown Denver. This marked the start of the shortest snow season on record… 167 days…through April 19…1941…when 0.4 inch of snow fell.

In 1959…high winds caused damage in many areas of the eastern plains.

In Denver…winds averaged 40 mph with gusts to 70 mph. Some damage was reported to utility lines…signs…and vehicles. Northeast winds were sustained to 30 mph at Stapleton Airport.


In 1933…the first measurable snow of the season totaled only 2.5 inches. This was the only measurable snow of the month. Northwest winds were sustained to 27 mph on the 4th.

In 1951…heavy snowfall of 5.7 inches was measured at Stapleton Airport where northwest winds gusted to 32 mph.


In 1896…west Chinook winds sustained to 44 mph with gusts to 46 mph warmed the temperature to a high of 56 degrees in the city.

In 1919…a rare November thunderstorm produced a mixture of rain and snow during the evening. Precipitation totaled only 0.14 inch with only a trace of snow. Northeast winds were sustained to 39 mph with gusts to 44 mph.

In 1948…a west-northwest wind gust to 50 mph was recorded at Stapleton Airport.

In 1994…winds gusted to 76 mph on the summit of Squaw Mountain…5 miles south of Idaho Springs.

In 2000…snow fell in the foothills west of Denver and across the southern suburbs. Snow totals included 6 inches near Evergreen…11 miles southwest of Morrison… And 7 miles south of tiny town and 5 inches in Aurora and Parker. Snowfall totaled 5.5 inches at the site of the former Stapleton International Airport. Northeast winds gusted to 26 mph at Denver International Airport where the visibility was reduced to 1/4 mile in heavy snow at times.

5-6 » Click here to read the rest of November 4 to November 10: This week in Denver weather history

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Tuesday to offer a nice bit of sun, cooler than normal temps

Tuesday, November 6th, 2018 5:07am MDT

Not too bad of a day ahead for Thornton but one with some cool mercury readings. There will be plenty of sun though but with some breezy winds.

Clear skies start things off then we will see a few clouds arrive. Mostly sunny skies should be the general rule though. Temperatures will top out around 50 degrees, about 7 degrees below normal for the date. We do expect some breezy winds from late morning into the early afternoon.

Tonight, partly clear skies will be above with lows dipping to the mid-20s. Keep an eye on current conditions here.

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Thornton’s workweek starts with a continuation of the cool temps, breezy winds

Monday, November 5th, 2018 5:01am MDT

Not a lot of variance in today’s weather from what we have been seeing of late. Temperatures will remain cooler than normal with some breezy PM winds but we should see more sun.

The day starts out with partly clear skies but will see gradual clearing from the start. By this afternoon, mostly sunny skies will be above.

Temperatures will top out in the mid-50s, close to, but just shy of the average for today’s date of 57 degrees. As for the winds, look for them to pick up the pace after noon then settle down after sunset.

Tonight, mostly clear skies will be above with lows near freezing.

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October 2018 weather recap: Cooler than normal temps, near normal precipitation

Sunday, November 4th, 2018 1:32pm MDT

Fall arrived in earnest during the month of October 2018 as temperatures cooled considerably and we saw our first snowfall of the season.

The first two weeks of the month were notable for seeing 12 of 17 days with below normal temperatures. Five days in a row with measurable rain came from the 4th to the 9th and then on the 14th we saw that first snowfall.

The latter half of the month warmed up with above normal mercury readings being seen on all but the last two days of the October.  That same stretch of mild days also was one in which we saw no precipitation.

While the overall warm end of the month helped, we still saw overall monthly temperature readings well below normal.

Thornton’s average monthly temperature came in at 47.0 degrees. This is in comparison to Denver’s long term October average of 50.9 degrees, a near 4 degree difference.  Out at Denver International Airport where the Mile High City’s official readings are taken, it was a bit warmer with an average for the month of 49.2 degrees.

Here, we ranged from a high of 85.7 degrees on the 3rd down to a low of 18.1 degrees on the morning of the 15th. Denver saw a max of 86 degrees and a low of 18 degrees, each on the same days as our max and min.

Denver set two temperature records during the month.  The high temperature of only 27 degrees on the 14th set a new record low maximum for the date. This easily bested the old record of 36 degrees set in 1969. A record low temperature reading of 18 degrees on the 15th topped the previous record low for the date of 20 degrees set in 1970.

In terms of precipitation, Thornton recorded 1.01 inches between rain and snow melt.  Denver was very similar with a total of 0.99 inches.  Both measurements were close to the long term Denver average of 1.02 inches for the month.

Thornton saw a relatively minimal 2.8 inches of snowfall, all on the 14th. Denver recorded a bit more of the white stuff with 3.2 inches. Both were short of the October average of 4.0 inches.

Click here to view Thornton’s October 2018 climate report.

Thornton, Colorado's October 2018 temperature summary. (ThorntonWeather.com)

Thornton, Colorado’s October 2018 temperature summary. (ThorntonWeather.com)

Thornton, Colorado's October 2018 precipitation summary. (ThorntonWeather.com)

Thornton, Colorado’s October 2018 precipitation summary. (ThorntonWeather.com)



                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
 HIGH              90   10/01/1892
 LOW               -2   10/29/1917
HIGHEST            86   10/03        83       3       84  10/25
LOWEST             18   10/15        22      -4       13  10/27
AVG. MAXIMUM     61.6              65.3    -3.7     64.5
AVG. MINIMUM     36.8              36.6     0.2     35.7
MEAN             49.2              50.9    -1.7     50.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      1               0.4     0.6        0
DAYS MIN <= 32      7               8.5    -1.5       11
DAYS MIN <= 0       0               0.0     0.0        0

 MAXIMUM         4.17   1969
 MINIMUM            T   1934
TOTALS           0.99              1.02   -0.03     0.96
DAILY AVG.       0.03              0.03    0.00     0.03
DAYS >= .01         9               5.3     3.7        5
DAYS >= .10         3               2.4     0.6        4
DAYS >= .50         0               0.5    -0.5        0
DAYS >= 1.00        0               0.1    -0.1        0
 24 HR. TOTAL    0.31   10/07 TO 10/07           10/09 TO 10/09

TOTAL             3.2               4.0

HEATING TOTAL     487               440      47      455
 SINCE 7/1        565               581     -16      585
COOLING TOTAL       4                 5      -1        1
 SINCE 1/1       1026               769     257      881

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

AVERAGE WIND SPEED              9.7

AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             16


THUNDERSTORMS             5      MIXED PRECIP       2
HEAVY RAIN                0      RAIN               3
LIGHT RAIN               12      FREEZING RAIN      0
LIGHT FREEZING RAIN       0      HAIL               0
HEAVY SNOW                0      SNOW               3
LIGHT SNOW                6      SLEET              0
FOG                      11      DENSE FOG          4
HAZE                      2

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Thornton’s November weather preview: A month with widely varying weather

Sunday, November 4th, 2018 5:02am MDT

Thornton's November weather previewThe weather during the month of November in Denver metro area can offer just about anything.  While it is normally a quiet month, it can be prone to extremes.

November has historically been one of Denver’s snowiest months and major snowstorms are not entirely uncommon.  However conditions can also be quite dry.

Temperatures during the month continue to cool as we get closer to winter and by the end of the month the low temperatures routinely dip to 20 degrees or below.  At times it can in fact bring conditions more like what we see in January.

Get all the details on November’s weather and what we can expect in our complete preview here.

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Thornton’s weekend to offer somewhat unsettled weather conditions

Friday, November 2nd, 2018 5:04am MDT

A couple of disturbances will be moving into northern Colorado and while the biggest impacts will be in the high country, we will feel their effects here at lower elevations as well. Most notably, will be a good bit of breezy winds today and tomorrow, perhaps a shower overnight tonight.

For today, mostly sunny skies will be above throughout the day. Downslope flow will help aid temperatures to climb a bit above normal. Look for winds to pick up after noon and continue into tonight.

Tonight, partly clear skies will be above along with the aforementioned wind. After midnight, we stand a slight chance to see some light rain, perhaps a few flakes of snow in the pre-dawn hours tomorrow.

Saturday cools down a good bit with highs in the low to mid-50s. Partly sunny skies will be above and breezy winds will last throughout the day, finally easing in the late evening.

Overnight Saturday into Sunday morning, partly cloudy skies will be above with lows dipping to around freezing.

The weather settles down a bit on Sunday to close out the weekend. Partly sunny skies can be expected with highs in the mid-50s.

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