Thornton, Colorado, USA
UpdatedSun, 24-May-2020 6:45pm MDT 


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Thornton’s Tuesday to feature near normal temperatures, lots of sun

Tuesday, November 12th, 2019 4:53am MDT

A nice, fall day ahead for us. We’ll see lots of that Colorado blue above and mercury readings will be a bit above normal.

The day starts with sunny skies and while the afternoon will offer a few clouds, they won’t do much to obscure the view. High temperatures today will be in the mid to upper 50s. Overall conditions will be calm with light winds out of the southwest.

Tonight, cloud cover will increase as a weak disturbance moves in. Overnight lows will be in the low to mid-30s.

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Early Veterans Day snow to give way to clearing skies and cold temperatures

Monday, November 11th, 2019 4:56am MDT

Last night’s freezing drizzle and light snow are coming to an end now. The balance of the day will see skies clear but cold temperatures will linger.

Snow is tapering off and will be entirely done by about 9:00am. By then, we will start to see the clouds break and by the afternoon mostly sunny skies will be above. It will remain cold today with highs likely not even reaching the freezing mark.

Tonight, skies will be clear with overnight lows in the teens.

We will be rebounding quickly from the snow and cold with the balance of the week looking to be dry and warmer. See more in our extended weather forecast here.

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November 10 to November 16: This Week in Denver Weather History

Sunday, November 10th, 2019 4:56am MDT
This week in Denver weather history

November 10 to November 16: This Week in Denver Weather History

Wintry weather is not unusual this time of year but as our look back at this week in Denver weather history shows, high winds can be just as common and oftentimes more damaging.

From the National Weather Service:


In 1985…Indian summer came to an abrupt end when a winter storm dumped 10 to 18 inches of snow in the Front Range foothills and 6 to 10 inches across metro Denver…snarling traffic and causing flight delays of up to 3 hours at Stapleton International Airport. The temperature plunged from a high of 66 degrees on the 8th to a low of only 13 degrees on the 9th…after the passage of a vigorous cold front with northeast winds gusting to 32 mph. The temperature climbed to only 19 degrees on the 10th…setting a record low maximum for the date. Snowfall totaled 7.3 inches at Stapleton International Airport with most of the snow…7.1 inches…falling on the 9th.


In 1897…west Chinook winds sustained to 51 mph with gusts to 60 mph warmed the temperature to a high of 64 degrees.

In 1915…southwest winds were sustained to 41 mph with gusts as high as 44 mph.

In 1955…strong winds raked the eastern foothills. A wind gust to 80 mph was recorded atop Rocky Flats south of Boulder where some damage occurred.

In 1995…snowfall totaled 6 to 9 inches in the foothills west of Denver…while only 2.2 inches of snow fell at the site of the former Stapleton International Airport. North-northeast winds gusted to 31 mph at Denver International Airport.

In 1998…strong bora winds gusting from 70 to 92 mph coupled with blowing snow created whiteout and slick black ice conditions at the base of the foothills west of Denver. State Highway 93 between Golden and Boulder and C-470… Near the Morrison interchange were closed for several hours due to multiple car accidents. Dozens of motorists were stranded until weather conditions improved. A small motor home was a total loss when it caught fire after being blown on its side by strong crosswinds. A man was injured when he was blown off a vehicle while attempting to rescue the occupants. Wind gusts included: 92 mph atop Blue Mountain near Coal Creek Canyon…83 mph atop Fritz Peak near Rollinsville…and 77 mph at Jefferson County Airport near Broomfield. West winds gusted to 36 mph at Denver International Airport.

In 2000…freezing drizzle was widespread across northeastern Colorado with the heaviest amounts near the foothills in the evening. The freezing drizzle made many highways icy and slick…which contributed to a number of traffic accidents. Some highways across metro Denver were closed at times…including portions of State Highway 119 between Boulder and Longmont and U.S. 36 between Westminster and Boulder. State Highway 93 between Boulder and Golden atop Rocky Flats became nearly impassable due to a coating of ice by late evening.


In 1911…a strong cold front produced snow and a cold wave. The temperature dropped 68 degrees from a high of 66 degrees at 12:40 pm on the 10th to a low of 2 degrees below zero at 7:15 am on the 11th. The low temperature of 23 degrees at midnight on the 10th was also the high temperature on the 11th. Northeast winds were sustained to 42 mph with gusts to 51 mph. Snowfall was only 2.5 inches.

In 1982…up to 4 inches of snow fell over the higher terrain between Denver and Colorado springs. Winds gusted to 50 mph along the foothills. Rainfall totaled 0.27 inch with only 0.1 inch of snow on the 11th at Stapleton International Airport where north winds gusted to 39 mph. Dense fog with visibilities as low as zero persisted all day on the 10th.


In 2014…an Arctic cold front on the 10th…associated with a strong storm system over the northern Rockies blasted into northeast Colorado. The temperature in Denver plummeted from the high of 64 degrees at 4:37 pm to 34 degrees by 5:53 pm. The temperatures continued to fall and dropped into the teens by early evening. The Arctic airmass remained entrenched over the region through the morning of the 14th…with the high temperatures failing to reach the teens from the 11th through the 13th. This was the first time since records have been taken in Denver…dating back to 1872…that there were three consecutive days with the maximum temperatures remained below 20 degrees in the month of November. In addition to the frigid temperatures…0.1 inch of snowfall was observed on 11th at Denver International Airport…which marked the first measureable snowfall for the season. An additional 2.2 inches of snowfall was measured on the 12th. Several temperature records were broken. A record low max of 16 degrees on the 11th broke the previous record of 19 set back in 1916. A record low max of 6 degrees on the 12th broke the previous record of 9 degrees…also set in 1916. The record low of -13 on the 12th…shattered the previous record of -4 degrees set back in 1872. Even more impressive…the record low of -14 degrees on the 13th broke the previous record of -3 degrees set back in 1916. The sudden drop in temperatures on the 10th…followed by several days of sub-freezing temperatures chilled trees to the core. The record drop in temperatures…preceded by mild fall temperatures…damaged or killed scores of trees across the Urban Corridor and Northeast Plains. At the time…the trees were not finished with the hardening process that enables them to withstand winter weather. Many were instantly flash-frozen…and some would not show signs of damage until spring of 2015. Of the 2.2 million trees in the city of Denver alone…tens of thousands were killed from the November frost. Denver estimated a citywide loss of more than 10 million dollars.


In 1901…a trace of rain fell in the morning…and a trace of snow fell in the afternoon. This was the only snowfall and precipitation for the month…ranking it the driest November on record…along with November of 1899 and 1949. The month also ranks as the second least snowiest November…along with Novembers in other years.

In 1903…northwest winds sustained to 45 mph with gusts to 56 mph warmed the temperature to a high of 56 degrees.

In 1912…rain changed to snow…which became heavy…and totaled 6.5 inches over downtown Denver. Precipitation was 1.02 inches…the greatest calendar day precipitation ever recorded in November. Northeast winds were sustained to 27 mph with gusts to 29 mph.

In 1919…light snow fell from an apparent clear sky during the early afternoon. The first snow was observed at about 12:40 pm and continued at least 30 minutes before clouds could be seen forming…followed by the sky becoming totally cloudy. During this time the temperature fell from 50 degrees at noon to only 18 degrees at 100 pm and plunged to 6 degrees at 5:45 pm. A low temperature of 2 degrees was recorded overnight. Northeast winds were sustained to 33 mph with gusts to 36 mph between noon and 1:00 pm behind an apparent arctic cold front. Snowfall was only 0.1 inch.

In 1949…north winds gusted to 50 mph at Stapleton Airport. A trace of rain fell. Another trace of rain on the 15th was the only precipitation of the month…making the month one of the driest Novembers on record and the least snowiest with no snow. This was the first November since 1882 without snow.

In 1959…strong northwest winds struck Boulder and the foothills causing some damage. West winds gusted to 37 mph at Stapleton Airport.

In 1995…strong downslope winds gusting to 84 mph blew out a few car windows in Boulder County. Winds gusted to 69 mph at Golden…Lakewood…and Table Mesa in Boulder. West-northwest winds gusted to 43 mph at Denver International Airport.

In 2000…heavy snow occurred in the foothills southwest of Denver and over monument ridge south of Denver. Snowfall totals included: 6.5 inches near Parker… 6 inches near Bergen Park…5 inches at Genesee and near Sedalia…and 4 inches at Coal Creek Canyon and St. Mary’s glacier. Snowfall totaled 1.6 inches at the site of the former Stapleton International Airport.

In 2003…strong downslope winds developed along the Front Range. Peak wind reports included 91 mph atop Blue Mountain near Wondervu and 75 mph in Boulder. Damaging winds downed power lines in Boulder County. North of Golden…a semi-truck was blown over by the winds near the intersection of State Highways 72 and 93 atop Rocky Flats. At the same location…blowing rocks shattered several car windows at an RTD Park and Ride. West winds gusted to 40 mph at Denver International Airport.

» Click here to read the rest of November 10 to November 16: This Week in Denver Weather History

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Denver sets new record high temperature for November 9th

Saturday, November 9th, 2019 2:28pm MDT

Record High Temperature

We knew today would be the warmest day of the weekend and not only did that hold true, it was a record setting performance.

As measured at DIA, Denver’s high temperature today reached 77 degrees (as of this writing). That bested the record high temperature for November 9th of 76 degrees set in 1927.

Here in Thornton, we were a bit warmer with a high of 79 degrees.

Hopefully you enjoyed it as cooler weather lies ahead. See our extended forecast for details.

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Thornton’s weekend starts out pleasant and mild, will end with a return of wintry conditions

Friday, November 8th, 2019 5:01am MDT

A bit of a mixed bag for the weekend. We start out with some of the nicest and warmest weather we have seen in a couple of weeks but as the weekend ends, Mother Nature brings the chill back.

For Friday, sunny skies with a just a few clouds here and there will be above. Conditions will be calm and high temperatures will climb to the mid-60s. Tonight, skies will be clear and lows dropping to the mid-30s.

Saturday will be the warmest day of the period. Lots of sun will be above and highs will be near the 70 degree mark. Saturday night, mostly clear skies will be above with lows in the mid-30s.

Sunday will be a day of transition. Mostly sunny skies will be above but it will be cooler with highs in the mid-50s. A cold front pushes in later in the day and that is going to bring about changes. Sunday night a wintry mix of freezing drizzle and snow will be seen and lows will drop to the low 20s.

Veterans Day will be mostly cloudy with light precipitation in the form of drizzle and snow possible. Highs will be below freezing and we may see an inch or two of the white stuff.

Enjoy the warmth while you can and keep an eye on http://www.thorntonweather.com/ as the next storm approaches.

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Early morning clouds will give way to sun and cool temperatures Thursday

Thursday, November 7th, 2019 4:53am MDT

Last night’s precipitation no doubt left some ice on your cars but roads for the most part are dry. That system is moving out and in its wake skies will clear and we will see calm conditions today.

Cloudy skies start us off but by mid-morning the cover will ease and mostly sunny skies will be above by the noon hour. Temperatures today will remain on the cool side with highs near 50 degrees.

Tonight, clear skies will be above with overnight lows in the upper 20s.

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Cold front arrives Wednesday cooling things down, bringing slight chance for overnight precip

Wednesday, November 6th, 2019 4:55am MDT

A weak system is going to impact Thornton’s weather today a bit. Temperatures will be cooler and we will have a few more clouds. Tonight brings a chance for some drizzle / freezing drizzle.

Sunny skies start us off then cloud cover will slowly increase as the day progresses and the front approaches. High temperatures today will be around the 50 degree mark.

Tonight, clouds will settle in and from late evening into the early morning some spots may see some drizzle, perhaps freezing drizzle. Right now, the precipitation doesn’t look like it will amount to much but it could get slick in spots that are affected.

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Thornton’s November weather preview: A month that can be prone to extremes

Tuesday, November 5th, 2019 10:27am 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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Calm conditions, temperatures near normal for Thornton’s Tuesday

Tuesday, November 5th, 2019 4:58am MDT

A pretty nice looking day ahead for us. Temperatures finally will warm up to near normal highs and we will have lots of sun above.

Early on there may be a few spots of patchy fog. Once that clears, sunny skies will be the rule throughout the day. Temperatures will warm to a high in the mid-50s, right near the average high for the date of 56 degrees.

Tonight, partly cloudy skies will be above with lows in the upper 20s.

Enjoy the relative warmth today as a cold front arrives tomorrow that will cool us back down for a couple of days.

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Thornton’s workweek starts with calm, cool conditions

Monday, November 4th, 2019 4:57am MDT

A weak disturbance to our north will cool things down some today. Conditions will be calm though and with a good bit of sun.

Partly clear skies start us off but as that disturbance moves east, our skies will clear leaving mostly sunny skies in the afternoon. Temperatures today will be cooler than yesterday and still well below normal. Look for a high in the mid-40s.

Tonight, partly clear skies will be above with overnight lows in the mid-20s.

Overall, the coming week looks to be calm but also remain on the cool side. Check out our extended weather forecast for more.

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