Thornton, Colorado, USA
UpdatedTue, 29-Nov-2022 1:50am MST 


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Thornton’s weekend weather starts out mild, ends a good bit cooler

Friday, October 14th, 2022 5:07am MST

Overall, our weather will remain calm and dry for the three day period. However, after a mild start, we will see temperatures cool over the balance of the weekend.

For Friday, look for sunny skies followed by a few PM clouds. There will be some breezy winds in the afternoon and early evening. Temperatures will top out at the mid to upper 70s. Tonight, skies will be mostly clear and lows will dip to around 40 degrees.

Saturday starts out mostly clear then will see cloud cover increase in the late morning. Look for highs in the mid-60s. Saturday night, skies will be mostly cloudy with lows in the upper 30s.

Sunday will be the coolest day of the period. We will start out with partly clear skies but cover will decrease through the day. Highs will be in the low to mid-60s.

Have a great weekend!

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October 9 to October 15: This Week in Denver Weather History

Thursday, October 13th, 2022 5:37am MST

This Week in Denver Weather History

Denver has yet to get a taste of wintry weather this year as we continue what has been a very dry period the last few months. In the past that hasn’t always been the case and our look back at this week in Denver weather history shows that heavy, winter-like snowstorms can and do strike in October.

From the National Weather Service:


In 2017…an early season snowstorm produced heavy wet snow which broke branches and downed power lines. About ninety- eight thousand outages occurred in Denver and the surrounding metro area. Almost half the outages were very short…while 54210 were sustained outages that lasted longer than five minutes. Some however lasted for several hours. Snow amounts varied greatly along the Interstate 25 Corridor. West of I-25…storm totals included: 7.5 inches in Arvada…7 inches in Broomfield…6 inches Boulder and Louisville…with 5 inches at Ralston Reservoir. East of I-25…storm totals ranged from a trace to 4 inches. In the mountains and foothills…storm totals included: 12.5 inches near Genesee…10 inches at Eldorado Springs… Idledale and Nederland…with 8.5 inches near Jamestown.


In 1910…light smoke from forest fires in the mountains was sighted over the city.

In 1982…northwest winds gusted to 49 mph at Stapleton International Airport.


In 2005…a major winter storm brought heavy…wet snowfall to the Front Range mountains…eastern foothills…portions of metro Denver…and the Palmer Divide. Snow accumulations ranged from 8 to 26 inches with drifts from 3 to 4 feet in places. The heaviest snow occurred to the east and southeast of the city…closing most major highways in that area…including I-70 from Denver to Limon. The Red Cross opened four shelters for people who were stranded along I-70 in eastern Colorado. Since many trees had not yet shed their leaves…the storm caused significant tree damage. One woman in Denver was killed when a tree branch… 8 to 10 inches in diameter…snapped under the weight of the heavy…wet snow and struck her as she was shoveling her driveway. Xcel Energy reported power outages to about 35 thousand customers. Several incoming flights were delayed at Denver International Airport. Snow totals included: 16 inches in the foothills near Boulder…12 inches at Genesee and near Golden…22 inches near Watkins…19 inches near Bennett…17 inches southeast of Aurora…14 inches near Parker…13 inches near Castle Rock…12 inches in centennial… 11 inches in Parker…and 10 inches at Denver International Airport and in Littleton. While many areas of metro Denver received heavy snow…others experienced almost entirely rain. This included west and northwest metro Denver…Boulder…and Longmont. Rainfall amounts were significant as storm totals ranged between 1.50 and 2.50 inches. The steady rainfall triggered 3 rockslides in foothills canyons. Two of the slides occurred on State Highway 119 in Boulder Canyon and the longest slide…7 feet in length…on State Highway 74 in Bear Creek Canyon at Idledale. North winds were sustained to around 23 mph with gusts to 31 mph at Denver International Airport on the 9th. The high temperature of only 34 degrees on the 10th was a record low maximum for the date. The low temperature on both days was 32 degrees.

In 2019…a vigorous winter like storm system brought intense northerly winds and the cold front blasted through the urban corridor. Peak wind gusts from 50 to 60 mph accompanied the front. Some trees in Denver were uprooted by the strong winds. Light rain and drizzle overnight…changed over to the season`s first snow during the predawn hours of the 10th. Bands of moderate to heavy snow brought 2 to 6 inches of snow in the Front Range mountains…foothills and urban corridor. The morning commute was especially hazardous as falling temperatures froze wet roads. Multiple crashes occurred including: I-25 in Denver…I-70 from Denver west to the Eisenhower Tunnel and State Highway 285 towards Fairplay. Over 300 crashes were reported in Denver and Aurora alone. After reaching a maximum temperatures of 83 degrees on the afternoon of the 9th…the temperature plummeted to 13 degrees on the 10th. A temperature change of 70 degrees…the second largest 2-day swing for the month of October in Denver weather history.


In 1901…an evening thunderstorm produced east winds to 43 mph with gusts to 48 mph.

In 1949…strong winds believed to be the worst in Boulder’s history at the time caused over 100 thousand dollars damage in the city. Peak winds were estimated to 85 mph at Valmont…just east of Boulder. High winds also occurred over most of metro Denver and caused damage to trees…window glass…and utility lines. The damage was most pronounced over the northwest metro area…including north Denver and Lakewood. Falling tree branches caused damage to parked autos and houses. Wind gusts to 70 mph were recorded at Stapleton Airport.

In 1964…lightning struck and killed a 13-year-old boy…while he was riding his bicycle along a tree-lined residential street in south Denver. Apparent microburst winds gusted to 54 mph at Stapleton International Airport.


In 1986…the first significant snowstorm of the season produced 2 to 5 inches of snow over metro Denver with 5 to 10 inches in the foothills west of Denver. Wondervu recorded the most snow from the storm…13 inches. The heavy wet snow caused numerous power outages. The storm was accompanied by strong north winds with gusts to 41 mph recorded on the 10th. The first snowfall of the season totaled 3.1 inches at Stapleton International Airport with only one inch on the ground due to melting. The strong cold front accompanying the storm cooled the temperature from a high of 73 degrees on the 10th to a high of only 33 degrees on the 11th…which was a record low maximum for the date.


In 1969…the second heavy snowstorm in less than a week dumped nearly a foot of snow across metro Denver and plunged the area into extremely cold temperatures for so early in the season. Snowfall totaled 11.0 inches at Stapleton International Airport. North winds gusting to 26 mph produced drifts up to 2 feet deep. Temperatures dipped from a high of 52 degrees on the 10th to a record low for the date of 10 degrees on the 12th. There was additional damage to trees and power and telephone lines from heavy snow accumulations and icing. Travel was restricted or blocked by drifting snow in both the mountains and on the plains east of Denver. » Click here to read the rest of October 9 to October 15: This Week in Denver Weather History

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Temps near normal, lots of sun for Thornton’s Thursday

Thursday, October 13th, 2022 5:17am MST

Another fine fall day for us. Lots of sun will be above and we will see temperatures top out right near average for the date.

Sunny skies will be the rule throughout the day. Overall, conditions will be calm and dry. Look for highs to top out in the mid to upper 60s.

Tonight, skies remain mostly clear with overnight lows around 40 degrees.

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Wednesday starts out chilly but warms up nicely, plenty of blue above

Wednesday, October 12th, 2022 4:57am MST

If you step out early this morning you will definitely feel a bit of chill in the air. It will, however, be warming up nicely and highs should be a bit above normal.

Clear, sunny skies start us off and will be with us throughout the daytime hours. Overall, conditions will be calm. It will be slightly breezy this afternoon but not as much as yesterday. Look for highs in the low to mid-70s.

Tonight, with skies remaining mostly clear, temperatures will get on the chilly side again. Look for lows in the mid to upper 30s.

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Tuesday temps remain mild, a bit of wind and possibly a shower thrown into the mix

Tuesday, October 11th, 2022 5:02am MST

A little bit of a change in the weather pattern for us today. While we will still see a good bit of sun and mild temps, breezy winds will intrude this afternoon and this evening may bring a shower.

The day starts off with sunny skies that will be around till the morning. The afternoon will see cloud cover increase leading to partly sunny conditions. High temperatures will again top out around 75 degrees. Winds will start picking up around mid-morning then it becomes a bit blustery from noon into the evening hours.

Tonight, we stand a bit of a chance to see a light shower from about 6:00pm to midnight. Winds will ease in the late evening. Overnight lows will dip to around 40 degrees.

Keep an eye on those wind speeds here.

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Thornton’s workweek starts out mild with lots of blue above

Monday, October 10th, 2022 4:57am MST

Our nice weekend weather is going to continue right into the start of this week. We will see temps a good bit above normal and sunny skies for much of the day.

Clear skies start us off and will be with us till mid to late afternoon when just a few clouds arrive. Overall, conditions will be calm and dry. High temperatures will top out in the mid-70s.

Tonight, conditions remain call and skies mostly clear. Overnight lows will dip to the mid-40s.

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Thornton’s weekend starts out on the cool and cloudy side, will then warm up nicely

Friday, October 7th, 2022 4:59am MST

With the passage of a cold front last night, the three-day period will start out cool. It won’t last long, however, and the balance of the weekend looks to be quite pleasant.

For today, cloudy skies will be with us most of the day then we might see the sun make an appearance toward mid to late afternoon. After some AM drizzle, mid-day will be dry then we may see a sprinkle of rain later. High temperatures will top out in the mid-50s, perhaps cooler than that depending on cloud cover. Tonight, partly cloudy skies will be above with overnight lows in the upper 30s.

Saturday sees us rebound nicely. Sunny skies will be above with highs in the mid-60s. Conditions will be calm and dry. Saturday night, lows dip to the low 40s under mostly clear skies.

Sunday warms up further. We again will have lots of sun above and highs will top out around 70 degrees.

Have a great weekend!

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Another fine, fall day in Thornton for Thursday

Thursday, October 6th, 2022 5:03am MST

Mild temperatures, lots of sun, calm conditions. Absolutely nothing to complain about with today’s weather forecast.

We start off with sunny skies and those will be with us for most of the day. Late afternoon will see a few clouds arrive. Overall conditions will be calm and dry. Look for highs right around the 70 degree mark.

Tonight, it will be mostly to partly clear. Overnight lows will tip to the low to mid-40s.

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Wednesday to offer up lots of sun, cool fall temperatures, calm conditions

Wednesday, October 5th, 2022 4:59am MST

A pretty much perfect early autumn day today for Thornton. We will enjoy comfortable temps and plenty of Colorado blue above.

Mostly sunny to sunny skies will be above throughout the day today. Overall conditions will be calm and dry. High temperatures will top out near the 70 degree mark.

Tonight, lows will dip to the mid-40s under mostly clear skies.


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Leaf peeping 2022: When and where to see the fall colors

Wednesday, October 5th, 2022 4:44am MST
Rocky Mountain National Park is a prime spot for viewing the fall foliage. (Tony's Takes)

Rocky Mountain National Park is a prime spot for viewing the fall foliage. (Tony’s Takes)

This time of year many folks start thinking about heading to the hills west of Denver in search of gold – fall foliage gold.

Where to go?  Below are five of ThorntonWeather.com’s favorite ones near Denver – plus a few further out and some bonus ideas.  After that, we will tell you where you can find a great website that provides regular updates on viewing conditions.

I-70 Corridor – If you’re looking for the easiest route, then this one is for you.  Simply head west on I-70 about 110 miles to Avon.  Between Vail and Avon, both sides of I-70 are lined beautifully with aspen.

Rocky Mountain National Park – One of the most popular summer destinations in the state is of course also a prime spot to view aspen in all their glory.  Once in the park head toward Bear Lake.  Glacier Gorge Junction provides a beautiful spot and you of course also get to enjoy all the splendor that Rocky Mountain National Park has to offer.  Extend your viewing by taking Trail Ridge Road all the way through to the west side of the park and the Grand Lake and Granby area.

Peak to Peak Highway – This little road trip can be a dual purpose trip – gambling and fall foliage viewing!  Take U.S. 6 through Clear Creek Canyon and then 119 through Blackhawk and Central City.  You can of course stop there if your wallet is fat enough and donate some money to the casinos.  From there continue on 119 toward Nederland.  Take highway 72 toward Ward and Allenspark.  There you will find more golden aspen than you can imagine, all with the Continental Divide nearby.

Colorado Fall Foliage - Average Date of Peak Aspen Colors. Click for larger view. (ThorntonWeather.com)

Colorado Fall Foliage – Average Date of Peak Aspen Colors. Click for larger view. (ThorntonWeather.com)

Poudre Valley Canyon –  Heading north on I-25 take Colorado 14 west and into Poudre Canyon and Roosevelt National Forest.  As you continue west you will come very near timberline as you come to Cameron Pass.  Amazing views abound!

Guanella Pass – This is a nice, relatively short drive from Denver.  From C470 take 85 through Bailey and Conifer, a nice drive unto itself.  When you come to the town of Grant, take the Guanella Pass Scenic and Historic Byway north to Georgetown.  The air is pretty thin along the way as you climb in excess of 11,500 views through the Pike and Arapahoe National Forests.

A couple other possibilities further from the Front Range:

Leadville / Aspen – From Denver take I-70 west to Copper Mountain and then Colorado 91 south over Freemont Pass to Leadville. Along the way there are plenty of viewing opportunities and Leadville is a nice little town to make a stop. From here you can take Highway 24 north back through Minturn and Vail. To extend the drive, take Highway 24 south to Colorado 82 and head toward Aspen. You can stop by the Maroon Bells in White River National Forest to view some of the most photographed mountains in Colorado.

Cottonwood Pass – From Denver take Highway 285 to Buena Vista. Head west on Main Street for seven miles then west on County Road 344 / Colorado 82. From there you start the climb up Cottonwood Pass with absolutely stunning views from the top. If you are up for it, you can continue down the west side of the pass into the Taylor Park area.

Honorable mentions worth considering:

  • Boreas Pass between Breckenridge and Como (County Road 10)
  • Kenosha Pass on Highway 285 between Bailey and Fairplay
  • Independence Pass (Colorado 82 between Aspen and Twin Lakes)
  • Colorado 103 from Evergreen to Echo Lake. Throw in a drive up Mount Evans for a bonus.

If you do head out, be sure to send us your pictures for inclusion in our monthly photo slideshows!

For more information:

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