Thornton, Colorado, USA
UpdatedWed, 16-Jan-2019 10:45pm MST 


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

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

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 MST

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 MST

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 MST

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 MST

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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Daylight Saving Time to end as we ‘fall back’ on Sunday, November 4

Thursday, November 1st, 2018 4:32pm MST
The United States returns to Standard Time at 2:00am Sunday as Daylight Saving Time comes to an end.

The United States returns to Standard Time at 2:00am Sunday as Daylight Saving Time comes to an end.

The biannual ritual of changing our clocks to adjust for Daylight Saving Time occurs this weekend, providing yet another signal of the changing of seasons.  The United States will ‘fall back’ one hour at 2:00am Sunday morning as we return to Standard Time.

The ritual of changing our clocks twice a year can be met with some resistance as some people struggle to adjust their body’s internal clock.  Others actually like the return to standard time as they get to enjoy an extra hour of sleep.

The time change definitely has big effects on the dawning of daylight and how early it gets dark in the evening.

Sunrise on Saturday occurs at 7:30am but on Sunday it will be at 6:32am. Similarly, sunset will occur at 5:55pm on Saturday but on Sunday the sun will disappear over the horizon at 4:54pm.

For many this means that when they get home from work it will now be dark and outdoor activities will be significantly curtailed as a result.

Arizona and Hawaii are the only states that do not observe Daylight Saving Time and remain on Standard Time year round.    The U.S. territories of Puerto Rico, American Samoa, Guam, Northern Mariana Islands, and the United States Virgin Islands also do not observe the event.

It won’t be all that long though before Daylight Saving Time returns.  On March 11, 2018 we will ‘spring forward.’

Daylight Saving Time Schedule

The mandated beginning and end of Daylight Saving Time has changed in the United States over the years.

The most recent schedule was set by the Energy Policy Act of 2005 and took effect in 2007.  We now ‘spring forward’ to begin Daylight Saving Time on the second Sunday in March and ‘fall back’ with the return to Standard Time on the first Sunday in November.
Daylight Savings Time Schedule

Year DST Begins 2 a.m.
(Second Sunday in March)
DST Ends 2 a.m.
(First Sunday in November)
2018 11 March 2018 4 November 2018
2019 10 March 2019 3 November 2019
2020 8 March 2020 1 November 2020
2021 14 March 2021 7 November 2021
2022 13 March 2022 6 November 2022
2023 12 March 2023 5 November 2023
2024 10 March 2024 3 November 2024
2025 9 March 2025 2 November 2025
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Near normal temps, breezy winds for Thornton’s Thursday

Thursday, November 1st, 2018 4:53am MST

The chill and wet of yesterday have moved out and in its wake we will warm back to near normal. A weak system though will keep some cloud cover and offer up breezy PM winds.

The day starts with partly clear skies and as the morning progresses, some of the clouds will clear before building back up in the afternoon. Temperatures will top out in the mid-50s, near but shy of the average high for the date of 59 degrees. Winds will become breezy and out of the northwest, particularly from mid-afternoon into the evening.

Tonight, skies will be partly clear with lows in the mid-30s.

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Thornton’s Halloween to see skies clear, conditions dry, remain cool

Wednesday, October 31st, 2018 4:59am MST

Well, the snow didn’t quite pan out as planned but we did receive some much-needed moisture (nearly a quarter of an inch). Today we dry out and will see a return of the sun before things get a bit chilly for those trick-or-treaters.

The day starts out with mostly cloudy skies and the rain has ended. Gradual clearing will be seen this morning leading to mostly sunny skies by later this morning.

Temperatures start out cold but then will see some improvement with highs today in the upper 40s. This evening, a weak system leads to increased clouds. Look for temperatures in the lower 40s dropping to the upper 30s when the kids are knocking on doors.

Overnight lows tonight will be near the freezing mark.

Get real time weather conditions here.

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October 2018 top shots: Monthly photo slideshow

Wednesday, October 31st, 2018 3:45am MST
A gorgeous sunrise as seen at the Rocky Mountain Arsenal kicks off the second day of the month. (Bill Hutchinson)

A gorgeous sunrise as seen at the Rocky Mountain Arsenal kicks off the second day of the month. (Bill Hutchinson)

October in Thornton can bring a wide variety of weather conditions, perfect for the photographer in all of us.

The month brings the changing of the colors at Colorado’s lower elevations and it is also is typically when we see our first freeze and first snow.

Couple those facts with our usual widely varying landscapes and wildlife and we have a month that is sure to bring in plenty of photo opportunities.

  • Slideshow updated October 31, 2018
  • 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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Tuesday gets much colder, will bring rain and snow

Tuesday, October 30th, 2018 5:00am MST

A big change from the unseasonably warm weather we have seen in recent days. A storm system will be pushing through that will send temps plunging and offer our first chance at precipitation in weeks.

Cloudy skies will be the rule today throughout. Temperatures are going to remain relatively stable with a high only in the lower 40s.

A few sprinkles of rain may pop up this morning with them becoming more likely in the afternoon. As we approach the evening and temperatures cool, a transition to snow should occur. We could see an inch or so between 6:00pm and midnight, then maybe just a bit more on top of that before dawn tomorrow.

Lows tonight will dip to around freezing.

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