Thornton, Colorado, USA
UpdatedThu, 19-Jul-2018 7:35am MDT 


ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook


Weather Geek Stuff - weathergeekstuff.com

Rocky Mountain Weather Network

Tony's Takes Photography


Recent News and Posts

Mild and breezy for Thornton’s Monday, PM brings chances for showers

Monday, February 5th, 2018 5:08am MDT

A bit of a mixed bag of weather for us today. Downslope winds will drive temperatures up however a cold front will move through this afternoon changing the flow to upslope and bringing chances for rain and snow.

We start out the day under mostly clear skies with breezy winds increasing in speed as the morning progresses. Temperatures will similarly be on the rise with our high of around 50 degrees coming around noon. Later in the afternoon the cold front arrives and that will send temperatures down.

Some isolated rain shower activity will be possible in the afternoon, primarily after about 2:00pm.  This evening, precipitation will change to snow with light snow being possible throughout the night. Only minimal accumulations are expected, perhaps a half inch or so.

Low temperatures tonight will be near the 20 degree mark.

What lies ahead for the rest of the week? Find out here.

Join the Discussion - Post your commentJoin the Discussion!

First weekend of February to offer up pleasant, calm weather conditions

Friday, February 2nd, 2018 4:58am MDT

Thornton is set to enjoy a good looking three-day period. The first couple of days will feature above normal temps while a cold front cools things down a bit Sunday.

For Friday, we start out with some patchy fog but that shouldn’t last long. Once it clears, partly sunny skies will be above. Temps will top out in the mid-50s today with calm, dry conditions. Tonight, skies remain a bit obscured with lows near the freezing mark.

Saturday will, overall, be the nicest of the three days. Mostly sunny skies will be above with highs in the mid-50s. Some slightly breezy winds will be possible in the afternoon but nothing too intrusive. Overnight Saturday into Sunday lows dip to below freezing.

Early Sunday a cold front arrives but its main effect will only be to brings temps down to near normal. Mostly sunny skies should be above, conditions calm.

Have a great weekend!

Join the Discussion - Post your commentJoin the Discussion!

Thornton’s February weather preview: Typically a warmer, less snowy month

Thursday, February 1st, 2018 7:04am MDT

Thornton and Denver, Colorado February Weather Preview.February in Colorado typically brings to an end an extended period when average temperatures are at their lowest. Winter begins to loosen its grip and temperatures get warmer but precipitation is not a particularly common event during the month.

Thus far our snow season has been relatively dismal with the seasonal total in Thornton more than 10 inches below average.  In the high country, the snowpack is not faring much better.  February is only our sixth snowiest month so we may not see much snowfall for the balance of the month.

Temperatures however do usually see a nice rebound during the month. Average high temperatures climb from an average of 44 degrees at the start to 50 degrees by the end of February.

For the complete February preview including a look at historical averages and extremes as well as a look at what long range forecasts are predicting, click here. 

Join the Discussion - Post your commentJoin the Discussion!

Following a few flakes, skies begin to clear, temps remain chilly Thursday

Thursday, February 1st, 2018 4:58am MDT

Thornton received just a very light bit of snow overnight and we may see a few more flakes this morning. Later it will begin to clear but temps will remain chilly.

The day starts with cloudy skies and a little bit of light snow. Some heavier bands of the white stuff are being seen not too far north of us as of this writing but we are not expecting that to move far enough south to hit Thornton.

Any snow should come to an end by mid-morning and then we will see gradually clearing skies. Temperatures will top out in the upper 30s.

Tonight, skies will be mostly cloudy with lows dipping well into the 20s.

Join the Discussion - Post your commentJoin the Discussion!

January 2018 top shots: Monthly photo slideshow

Wednesday, January 31st, 2018 2:00pm MDT
January 15, 2018 - A gorgeous Bald Eagle takes flight in Adams County. (Joyce DeAnda Ginther)

January 15, 2018 – A gorgeous Bald Eagle takes flight in Adams County. (Joyce DeAnda Ginther)

As one of our coldest months, January can be a good month to hibernate inside and avoid the outdoors.  But, like any month in Colorado, photo opportunities abound as our monthly slideshow demonstrates.

Snow is not normally dominant in the month but when it does fall, it can create a beautiful blanket of white.  Throw in the amazing sunrises and sunsets we receive in the middle of winter as well as wildlife and a host of other subjects and the imagery can be quite beautiful and stunning.

  • Slideshow updated January 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!

Join the Discussion - Post your commentJoin the Discussion!

Webcam captures the total lunar eclipse

Wednesday, January 31st, 2018 11:19am MDT

Just in case you missed it, our west-facing weather webcam happened to catch the “super blood blue moon.”  Certainly it isn’t as good as witnessing it in person but it does provide a cool look.  You can see the shadow of the Earth clearly obscuring the moon as the event progresses.  View full screen for the best view.

If you captured images of the celestial event, please share them with us so we can add them to our January slideshow.

Join the Discussion - Post your commentJoin the Discussion!

Cooler temps for Wednesday, overnight brings a chance for precipitation

Wednesday, January 31st, 2018 7:47am MDT

A bit of a change in the weather as a back door cold front moves in. That will serve to bring cooler temperatures to Thornton and tonight we may see some freezing drizzle with snow tomorrow AM.

The day starts out with partly sunny skies. Clouds will increase in the late afternoon as the system works its way closer. Winds will be out of the north and a bit breezy at times. Temperatures start out chilly then will warm to around the 50 degree mark.

Late evening brings slight chances for precipitation, likely in the form of freezing drizzle if it materializes.

Drizzle will be possible until early Thursday morning when some snow may get mixed in. Unfortunately there isn’t a lot of moisture with this system so are not expecting much out of it.

Join the Discussion - Post your commentJoin the Discussion!

Mild temperatures with breezy winds for Thornton’s Tuesday

Tuesday, January 30th, 2018 5:16am MDT

Some good, some not-so-good in today’s weather forecast. While we will enjoy unseasonably warm temperatures, we will also have a good bit of cloud cover and some breezy and gusty downslope winds.

The day starts with partly clear skies and we can expect similar sky conditions above throughout the day as a decent wave cloud develops. Winds out of the southwest will be breezy with gusts to 25mph will be possible in our area, higher as you get closer to the foothills. The one benefit of those warming, downslope winds is that they will help to drive the mercury to the low 60s.

Tonight, partly clear skies will be above with lows dipping to at, perhaps a bit below, the freezing mark.

If you’re planning on catching the lunar eclipse tomorrow AM, that cloud cover could probe to be problematic. Right now we are thinking there could be 50 to 60% cloud coverage during the event.

Join the Discussion - Post your commentJoin the Discussion!

Thornton’s workweek starts off with a mild day, a good bit of sun

Monday, January 29th, 2018 5:04am MDT

This is a nice way to go back to work. Monday will bring us temps a good ways above normal and calm, dry conditions.

The day starts off under mostly sunny skies and similar conditions above will be with us throughout the day but with a few more clouds in the afternoon. Winds will be relatively light and out of the southwest. Temperatures start out on the chilly side but once the sun comes up will begin a steady rise with highs in the mid-50s.

Tonight, a good bit of cloud cover will be above with overnight lows dipping to around 30 degrees.

What lies ahead for the rest of the week? See the extended weather forecast here.

Join the Discussion - Post your commentJoin the Discussion!

January 28 to February 3: This week in Denver weather history

Monday, January 29th, 2018 3:05am MDT
This week in Denver weather history

January 28 to February 3: This week in Denver weather history

You just never know what you are going to get with the weather in Denver and we see that in our look back at the Denver weather history books. From cold and snow to damaging winds and spring-like temperatures, we can and do see it all.

From the National Weather Service:


In 1888…a protracted warm spell lasted a week. Maximum temperatures ranged from 62 degrees on the 29th to an all time record high for the month of 76 degrees on the 27th. Daily record high temperatures of 76…69…and 71 occurred on the 27th…28th…and 30th respectively. Record high minimum temperatures of 47 and 34 occurred on the 26th and 27th.


In 1899…snowfall totaled 6.2 inches in the city. Northeast winds were sustained to 36 mph with gusts to 40 mph on the 28th.

In 1965…high winds raked the Front Range foothills. West winds gusted to 89 mph on Table Mountain in Boulder…87 mph at Rocky Flats…and 54 mph at Stapleton International Airport. Damage and minor injuries occurred in Boulder and western metro Denver. Four men were injured by wind-caused accidents while working on construction…2 in Denver and 2 in Boulder. There was extensive damage to power lines… Buildings…signs…and trees. Some minor accidents were caused by blowing dust and debris. Blown dust accumulated 2 to 3 feet deep on some lawns in northern metro Denver suburbs. Dust blew into buildings and homes.

In 1989…the heaviest snowstorm of the winter dumped 9 to 15 inches of snow across metro Denver. Snowfall totaled 8.8 inches at Stapleton International Airport with most of the snow…8.6 inches…falling on the 28th. Strong north winds gusting to 46 mph whipped the snow into 2-foot drifts and reduced visibility in blowing snow. The foothills received up to 18 inches of snow. The snow fell on a weekend…so closures and other disruptions were minimal. The public reported thunder in Arvada…Wheat Ridge…and Boulder on the evening of the 27th. A thunderstorm produced snow pellets at Stapleton International Airport during the early morning hours of the 28th. This was the first thunderstorm in the city during January since 1932.

In 1996…winds to hurricane force were reported across the Front Range foothills in the wake of a pacific storm system. Recorded wind speeds included: 86 mph at the National Center for Atmospheric Research southwest of Boulder…86 mph atop Squaw Mountain west of Denver…and 75 mph at Jefferson County Airport in Broomfield. West-northwest winds gusted to 48 mph at Denver International Airport on the 28th.

In 2009…high winds buffeted the foothills of Boulder and Jefferson counties. Peak wind gusts included: 101 mph at Eldora Ski Resort…100 mph…6 miles northwest of Boulder; 84 mph at NCAR Mesa Lab…79 mph…5 miles northwest of Boulder; and 75 mph at the National Wind Technology Center. In Nederland…a wind turbine recently installed was damaged by the high winds. A peak wind gust of 38 mph occurred at Denver International Airport on the 28th.


In 1951…a major storm dumped 10.1 inches of snowfall at Stapleton Airport. Most of the snow…8.3 inches…fell on the 29th. Cold arctic air accompanied the snow. Several temperature records were set…including record low maximum temperatures of 4 on the 28th and 4 below zero on the 29th and record low temperatures of 12 below zero on the 29th and 24 below zero on the 31st. Temperatures were below zero for 45 consecutive hours.


In 1872…the low temperature dipped to 22 degrees below zero… A record minimum for the date.

In 1909…gale force north winds were sustained to 45 mph behind an apparent cold front…which also produced a trace of snow.

In 1986…a wind gust to 67 mph was recorded in Boulder. West winds gusted to 41 mph at Stapleton International Airport.



In 1956…snowfall totaled 5.5 inches at Stapleton Airport where east winds gusted to 32 mph on the 28th.

In 1972…cold west winds buffeted Boulder. A wind gust to 92 mph was recorded at the National Bureau of Standards…while a gust to 76 mph was measured in downtown Boulder. Two mobile homes were overturned in Boulder. Other damage was minor. Northwest winds gusted to 40 mph at Stapleton International Airport on the 28th.

In 1987…strong winds buffeted the Front Range foothills and spread east over the plains. The highest wind recorded was 99 mph on the 29th at both the National Center for Atmospheric Research in Boulder and the Rocky Flats plant south of Boulder. Wind gusts in excess of 80 mph were common. A northwest wind gust to 54 mph was recorded at Stapleton International Airport on the 28th with a gust to 41 mph on the 29th. Planes were damaged at both the Boulder and Jefferson County Airports. Hangars were also damaged at Jefferson County Airport. Many windows were broken…signs toppled…and trees downed. A brick wall was blown onto parked cars in Lakewood. A couple of houses in Lakewood were unroofed…while falling trees damaged others. Two people were injured by flying debris in Lakewood and Golden. Total insured damage along the Front Range was 10 million dollars making the wind storm the second most costly on record in Colorado at the time.

In 1995…deepening upslope winds along the eastern foothills on the 28th gave way to periods of heavy snow during the night and early morning hours of the 29th. Snow fell to a depth of 8 inches in both Golden and Boulder with up to a foot in the foothills. Only 1.9 inches of snow fell at Stapleton International Airport…where east winds gusted to 22 mph on the 28th.

In 2001…heavy snow fell across metro Denver. The heaviest snowfall occurred from just south of Denver to around Castle Rock. Snow amounts included: 12 inches east of Parker…9 inches near Elizabeth and in Littleton…8 inches near Castle Rock and in Parker…and 7 inches in Aurora. Snowfall totaled 6.0 inches at the site of the former Stapleton International Airport.


In 1887…winds were strong and gusty for three days in the city. West and northwest winds were sustained to 56 mph on both the 28th and 29th and to 44 mph on the 30th. Temperatures warmed to a high of 57 degrees on the 29th.


In 1900…northwest winds were sustained to 45 mph with an extreme velocity of 46 mph.

In 1914…this was the last day of 60 consecutive days with snow cover of one inch or more in Denver. This third longest period of snow cover on record began with the record breaking snow and blizzard on December 1-5… 1913 when a total of 45.7 inches of snow fell in downtown Denver. Additional snowfall during December and January prolonged the event. Snow depth on the ground to the nearest tenth of an inch was measured once daily at 6:00 pm MST.

In 1927…west winds were sustained at 40 mph with gusts to 42 mph.

In 1942…heavy snowfall totaled 6.2 inches in downtown Denver. North winds were sustained to 17 mph.

In 1965…strong winds occurred in Boulder for the third consecutive day. Only limited minor damage was reported. Northwest winds gusted to 40 mph at Stapleton International Airport.

In 1984…highs winds in and near the foothills produced wind gusts as high as 71 mph in Boulder. A plane was flipped over at Jefferson County Airport and damaged beyond repair. In Lakewood…two construction trailers were damaged by the gusts. North winds gusted to only 38 mph at Stapleton International Airport.

In 1990…gale to hurricane force winds gusts raked the foothills. Wind gusts of 50 to 90 mph were common in Boulder County. A peak wind of 94 mph was clocked at Table Mesa in southwest Boulder. Scattered power outages and minor property damage were reported. West winds gusted to 46 mph at Stapleton International Airport.


In 1985…an arctic air mass with snow closed I-70 for a time in Denver and east of Denver. Snowfall totaled 5.4 inches at Stapleton International Airport where north winds gusted to 29 mph on the 29th.


In 1883…a major winter storm dumped 19.3 inches of snow on downtown Denver. Most of the snow…12.2 inches…fell on the 31st. This was the heaviest snowfall to hit the city in years. Temperatures plunged from a high of 52 degrees on the 29th to a low of 13 degrees on the 31st. Precipitation from the storm totaled 2.23 inches. The 1.22 inches of precipitation on the 31st was the greatest calendar day and 24 hour precipitation ever recorded in the city during the month of January.

» Click here to read the rest of January 28 to February 3: This week in Denver weather history

Join the Discussion - Post your commentJoin the Discussion!