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Thornton, Colorado, USA
UpdatedTue, 29-Nov-2022 1:40am MST 
 

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Thornton’s workweek starts off with near average temps, a good dose of sun

Monday, November 7th, 2022 4:53am MST

Monday will offer up some pleasant, fall weather conditions. We start out on the cold side but then will warm up nicely and enjoy a good bit of blue above.

Mostly sunny skies start us off then we will see any cloud cover ease with few clouds in the afternoon. High temperatures will top out in the upper 50s, a little bit above average for the date. Overall, conditions will be calm and dry.

Tonight, cloud cover will increase but conditions remain calm. Overnight lows will dip to the mid-30s.

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Thornton’s weekend starts out with a chill, will then warm up nicely

Friday, November 4th, 2022 5:11am MST

The storm system that brought our first accumulating snowfall of the season is now working its way out. We will remain on the cold side today but then see a nice warm up for the rest of the weekend, albeit with some wind.

Thornton is waking up to a nice 2.7 inches of snow. As you take to the roads this morning, be very careful as bridges and overpasses are very slick.

We will see a few flakes of snow early but nothing to add to the accumulation. Precipitation will end by sunrise then skies will clear pretty rapidly leading to sunny skies for most of the day. High temps today will only top out in the low to mid 40s. Tonight, skies will be partly clear with lows in the mid to upper 20s.

Saturday will be the warmest day of the period but with some wind. Look for highs around the 60-degree mark with mostly sunny to partly sunny skies. Winds will be breezy for much of the day. Saturday night, lows will dip to the mid-30s under partly clear skies.

Sunday sees things cool down just a little bit. Highs will be in the mid-50s under partly sunny skies. Winds will again be breezy although they should be less than Saturday. Have a great weekend.

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Time to “fall back” as Daylight Saving Time ends Sunday, November 6

Friday, November 4th, 2022 5:09am 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 7:33am but on Sunday it will be at 6:34am. Similarly, sunset will occur at 5:53pm on Saturday but on Sunday the sun will disappear over the horizon at 4:52pm.

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 12, 2023 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 Dates

Year DST Begins 2 a.m.
(Second Sunday in March)
DST Ends 2 a.m.
(First Sunday in November)
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
2026 8 March 2026 1 November 2026
2027 14 March 2027 7 November 2027
2028 12 March 2028 5 November 2028
2029 11 March 2029 4 November 2029
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November 2022 preview: The transition to winter begins

Thursday, November 3rd, 2022 8:11am 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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October 2022 weather recap: Mild temps, not much precipitation

Thursday, November 3rd, 2022 6:49am MST
Thornton, Colorado October 2022 Temperature Summary. (ThorntonWeather.com)

Thornton, Colorado October 2022 Temperature Summary. (ThorntonWeather.com)

October 2022 goes into the books as one that saw Thornton experience above normal mercury readings and below normal precipitation. However, those were also a formula for a great number of pleasant, fall days.

Overall, Thornton’s average temperature for the month came in at an even 52.0 degrees. As measured at Denver International Airport, the Mile High City’s average temperature for the month was a good bit warmer coming in at 53.8 degrees.

Both readings were above Denver’s long term October average of 51.1 degrees and Thornton’s running 16-year average of 49.5 degrees.

Thornton saw a maximum temperature of 81.2 degrees occurring on the 20th and our coldest reading of 27.2 degrees occurred on the 29th. Denver maxed out at 79 degrees on the 20th as well and bottomed out 30 degrees on the 28th.

Precipitation was fleeting during the month and we were quite dry until the final week. Thornton totaled 0.43 inches in the bucket. Denver had a little bit more at 0.46 inches.

Both location’s totals were far below average. Denver’s long-term average for October is 0.99 inches while Thornton’s 16 year running average is at 1.04 inches.

While we did see some snowflakes mixed in with rain on the 27th of the month, it did not accumulate so we are still waiting for that first official snowfall.

Click here to view Thornton’s complete October 2022 climate summary report.

Thornton, Colorado October 2022 Precipitation Summary. (ThorntonWeather.com)

Thornton, Colorado October 2022 Precipitation Summary. (ThorntonWeather.com)

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Thursday to chill out, likely bring our first accumulating snow of the season

Thursday, November 3rd, 2022 5:04am MST

Say goodbye to the 70s and sun of recent days and hello to a bit of a dose of winter-like weather. Thornton will cool down considerably today and we should see the first measurable snow of the season.

The day starts out with some sun above but clouds will soon be increasing as the cold front pushes through a bit ahead of schedule. Temps will be pretty steady through the day in the low to mid-40s. Winds will be breezy and out of the northeast.

For precipitation, a light rain shower or two may be seen starting in the early afternoon. Chances for precipitation increase after 4:00pm. At that time, we should start to see a transition to snow in the mix.

Light snow will be likely through the evening until midnight then it will start to taper off. Right now, it looks like Thornton should receive around an inch by tomorrow morning. There is the potential to see a bit more if we end up under some stronger snow bands.

Overnight lows tonight will drop to the mid-20s.

Stay warm and keep an eye on our Winter Weather Briefing Page for all the latest.

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Thornton to enjoy warm weather for one more day Wednesday

Wednesday, November 2nd, 2022 5:07am MST

Another good-looking fall day for us with temps above normal and plenty of blue sky above. Enjoy it while you can as Thursday and Friday look to see us chill out a bit and perhaps bring our first measurable snowfall of the season.

For today, we will have some cloud cover this morning but that will ease throughout the day high. Overall, conditions will be calm and dry with winds out of the south. High temperatures will be climbing to the low 70s.

Tonight, lows will drop to the mid to upper 30s under mostly clear skies.

For the rest of the workweek, a storm system will mix things up although the details are continuing to change from model run to model run. In general, we are going to see temps cool considerably Thursday and Friday. Thursday afternoon, the system will make itself felt in earnest brining some rain. That is expected to change to snow Thursday night, potentially delivering an inch or two into the early morning hours Friday

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October 30 to November 5: This Week in Denver Weather History

Tuesday, November 1st, 2022 5:27am MST

This Week in Denver Weather History

The further we go into the cold season, the more we see significant winter-like events in our look back at Denver weather history. Many significant snowstorms have occurred this week in the past including one in 1946 that dumped more than 30 inches of snow on Denver.

From the National Weather Service:

28-30

In 1971…a vigorous cold front plunged temperatures from a high of 70 degrees on the 27th to record low levels on the 29th and 30th. Snowfall totaled 3.1 inches at Stapleton International Airport where north winds gusted to 23 mph. Some freezing drizzle also fell on the 28th. Record daily low maximum temperatures of 32 degrees on the 28th and 25 degrees on the 29th were established along with a daily record minimum of 13 degrees on the 30th.

28-31

In 1929…rain changed to snow on the afternoon of the 28th and continued until midday on the 30th followed by intermittent light snow which continued through the 31st. Snowfall over the four days totaled 16.2 inches in the city. Most of the snow…8.5 inches…fell on the 29th with 6.1 inches on the 30th. Temperatures hovered in 20’s during most of the storm.

29-30

In 1905…heavy snowfall developed on the evening of the 29th and continued through the evening of the 30th. Snowfall totaled 11.0 inches in downtown Denver. Precipitation was 1.02 inches. Temperatures were generally in the 20’s.

In 1959…rain during most of the day on the 28th changed to snow early on the 29th and continued through most of the 30th. Heavy snowfall totaled 7.4 inches at Stapleton Airport. North-northeast winds gusted to 24 mph on the 30th. Some freezing drizzle also occurred on the 30th.

In 1981…4 to 8 inches of new snow were recorded in the foothills west of Denver. Snowfall totaled only 0.4 inch at Stapleton International Airport where north winds gusted to 25 mph.

In 2019…a strong storm system brought record breaking temperatures and up to a foot of new snow to parts of Denver…especially across the south and southeast portions of the metro area down to the Palmer Divide. In Denver… a record low maximum temperatures of 18 was set on the 29th… followed by a record low temperatures of 3 degrees on the 30th. The combination of snow and wind along the Interstate 70 corridor east of Denver forced its closure in both directions for several hours due to drifting snow and poor visibility. One weather related traffic fatality…occurred in the foothills west of Denver which closed State Highway 6. The official snowfall measurement at Denver International Airport was 7.7 inches. Numerous schools in and around the Denver area and to the east were closed due to heavy snow and hazardous road conditions. Cancellations and delayed flights at Denver International Airport left 800 passengers stranded at the airport overnight. Along the urban corridor and Palmer Divide storm totals included: Storm totals included: 12 inches at Ponderosa Park…10 inches near Foxfield; and Parker; 8.5 inches in southwest Aurora; near Buckley AFB…Cherry Creek…east Denver…and southwest Aurora; 8 inches in Boulder and near Elizabeth…Federal Heights…Louisville and Westminster; 7.5 inches near Castle Pines…7 inches in southwest Aurora and near Shamballa and Quincy Reservoir; 6.5 inches near Rocky Flats; 6 inches near Byers…Elbert…Greenwood and Lakewood.

29-31

In 1889…the first snowfall of the season totaled 14.0 inches over the three days in downtown Denver. Snowfall was 8.0 inches on the 29th and 5.0 inches on the 31st. North to northeast winds gusted to 30 mph on the 29th.

In 1950…a warm spell resulted in five daily temperature records. Record highs of 84…80…and 79 degrees occurred on the 29th…30th…and 31st…respectively. Low temperature of 49 degrees on the 30th was the record high minimum for the date.

In 1991…the second surge of cold arctic air in a matter of days plunged metro Denver into the deep freeze. While low temperatures remained above zero…high temperatures were only in the 20’s. Three temperature records were set: record lows of 7 degrees on the 30th and 10 degrees on the 31st and a record low maximum of only 21 degrees on the 30th. Snowfall was light with only 1.9 inches recorded at Stapleton International Airport where east winds gusted to 23 mph.

In 2002…snowfall totaled 4.3 inches at the site of the former Stapleton International Airport. North winds gusted to 32 mph on the 29th behind a cold front…which plunged temperatures well below seasonal normals. High temperatures of 18 degrees on the 30th and 19 degrees on the 31st were record low maximums for each date. Low temperatures dipped to 12 degrees on the 30th and 15 degrees on the 31st.

29-1

In 1972…heavy snowfall totaled 15.5 inches at Stapleton International Airport. However…the heaviest snow occurred on Halloween night when 7 inches fell on trick-or-treaters during a short 3-hour period. I-25 was closed south of Denver. North winds gusting to 29 mph caused some blowing snow on the 1st. The snow started late on the 29th and ended during the mid afternoon on the 1st. The greatest snow depth on the ground at Stapleton International Airport was 13 inches on the 1st.

30

In 1974…a rare thunderstorm for so late in October produced hail to 3/8 inch in diameter and 0.10 inch of rain at Stapleton International Airport.

In 1991…the high temperature warmed to only 21 degrees…the all-time record low maximum for the month of October. The same temperature also occurred on October 25…1997.

30-31

In 2018…a storm system brought a brief period of moderate to heavy snowfall to the Front Range mountains…foothills… and Palmer Divide. Storm totals included: 11 inches near Allenspark; 7.5 inches…6 miles northwest of Lyons; 7 inches at Bear Lake; 6.5 inches near Bailey; 6 inches near Aspen Springs…Copeland Lake…Franktown…Lake Eldora and Larkspur; with 5 inches near Elizabeth. A trace of snowfall was observed at Denver International Airport.

31

In 1997…high winds buffeted the foothills and adjacent areas of metro Denver. West winds gusted to 70 mph in Broomfield and to 40 mph at Denver International Airport. The strongest winds occurred in the mountains west of Denver and in the foothills north of Denver.

In 2001…high winds developed in the foothills. Peak wind gusts were measured to 74 mph at the National Center for Atmospheric Research on the mesa in Boulder and to 72 mph near Rollinsville. West winds gusting as high as 53 mph warmed the temperature to a high of 71 degrees at Denver International Airport.

In 2020…extreme drought conditions continued in October. The first half of the month remained unseasonably warm… dry and windy. These conditions allowed the fires to the west and northwest of Denver to explode and double in size. The Cameron Peak wildfire become the largest in the state`s history. The Calwood wildfire in Boulder County started near Jamestown…and consumed 8788 acres within a 24-hr period on the 17th. It consumed a total of 10105 acres by the end of the month. The Calwood wildfire also became the largest wildfire in Boulder County history. The fire damaged or destroyed a total of 26 homes with preliminary damage estimates of nearly 37 million dollars. Extremely poor air quality continued to plague Denver and the entire Front Range. » Click here to read the rest of October 30 to November 5: This Week in Denver Weather History

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Thornton starts November with well above normal temps, calm conditions

Tuesday, November 1st, 2022 5:02am MST

As we flip the calendar to November, we continue the mild weather we ended October with. We once again enjoy a mild day and lots of blue above.

This morning will feature sunny skies and then the afternoon will see just a few clouds. High temperatures will top out right near the 70-degree mark. Overall, conditions will be calm and dry.

Tonight, we will see cloud cover increase some with overnight lows in the low 40s.

Looking ahead, Wednesday will be another mild one, similar to today. Then, Mother Nature brings a decent looking storm system our way Thursday and Friday. Temperatures will cool considerably and we will stand a chance for snow. See more in our extended forecast here.

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Nothing to be scared of in Thornton’s Halloween weather forecast

Monday, October 31st, 2022 5:00am MST

The little ghouls and goblins won’t find Mother Nature delivering anything frightful for them today or tonight. We will enjoy a pleasant fall day with the evening being cool and calm.

Sunny skies start us off and will continue throughout. Overall, conditions will be calm and dry. Look for daytime highs to top out in the mid-60s, a good bit above average.

Tonight, temperatures will slowly decrease down toward a low in the mid-30s. Skies will be mostly clear.

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