Thornton, Colorado, USA
UpdatedSat, 25-Sep-2021 6:20am MDT 


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Denver ties record high temperature for April 3

Saturday, April 3rd, 2021 6:59pm MDT

Record High Temperature

A beautiful day along the Colorado Front Range and one that has entered the record books.

As measured at Denver International Airport, the official high temperature today in the Mile High City topped out at 78 degrees. This tied the record high for April 3 set in 1943.

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

Tomorrow looks to be a record-setter as well. The record high for April 4 is 76 degrees set in 1967 and years prior. With a forecast indicating highs near 80 degrees, that record will likely fall.

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Thornton’s Easter weekend to feature lots of sun, temps well above normal

Friday, April 2nd, 2021 5:01am MDT

Spring has sprung as we will enjoy our warmest weekend in months. Conditions will be calm and dry and mercury readings about 20 degrees above normal.

For Friday, overall mostly sunny skies will be above with some light AM clouds then clear skies by the mid-afternoon. High temperatures today will top out in the mid-70s. Tonight, lows will drop to around 40 degrees under mostly clear skies.

Saturday will offer up sunny skies with few clouds to be seen. Highs will reach the upper 70s. Saturday night into Sunday morning, it will be mostly clear with lows in the low 40s.

Easter Sunday will be the warmest day of the three-day period, possibly record-breaking. Mostly sunny skies will be above as we push toward the upper 70s, perhaps hitting 80 degrees.

Denver’s record high for April 3rd (Saturday) is 78 degrees and the record for April 4th (Sunday) is 76 degrees. It is quite possible those records will be tied, if not broken, especially Sunday. Get outside and enjoy that weather!

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Thursday brings the beginning of a longer term warm up for Thornton

Thursday, April 1st, 2021 5:05am MDT

It is no April Fools joke to say that we are set to begin a period of very pleasant weather conditions. Today starts an extended period of mild, dry weather that will last well into next week.

The day starts off with sunny skies and we can expect those to stick around all day. There might be a cloud or two but nothing that will be intrusive. High temperatures today will top out in the mid to upper 60s. Conditions will be calm and dry.

Tonight, mostly clear skies will be above with overnight lows in the mid-30s.

Today is nice but will actually be the coolest day out of the next five or so. Highs in the mid-70s lie in wait for Friday and Saturday and Sunday and Monday may bring our first 80 degree readings of the season. Enjoy!

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March 2021 top shots: Monthly photo slideshow

Thursday, April 1st, 2021 3:33am MDT
A beautiful evening in Thornton. (LE Worley)

A beautiful evening in Thornton. (LE Worley)

The month of March is the start of meteorological spring and while conditions do begin warming, winter weather is certainly out of the question.  From hot to cold, snow to rain, the conditions can be very conducive to great pictures as we see in our slideshow.

March in Denver typically means frequent and rapid weather changes. The days grow longer and we start enjoying more sunshine and sometimes summer-like weather. However, on occasion arctic air masses can still force their way south into Colorado dropping temperatures quickly and markedly.

With the active wildlife, increased outdoor activities by us humans, and of course the weather, March imagery contains a wide variety of subjects and extremes.

  • Slideshow updated March 29, 2021. 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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Thundersnow makes a surprise appearance

Wednesday, March 31st, 2021 11:02am MDT

Anyone else hear or see this last night? A lone storm cell popped up near DIA and put on a nice little show (we had graupel at Thornton Weather HQ). Thank you to Jessica Fey Photography for sending us this. Just awesome stuff!

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Thornton closes out March with clear skies, cool temperatures

Wednesday, March 31st, 2021 5:00am MDT

After what has been a cold, wet month, we wrap it up today with calm, dry conditions. Mercury readings will be on the cool side but mark the beginning of a nice warm up.

Sunny skies start us off and will be with us throughout today and tonight. Nary a cloud will be seen. Highs will top out right around the 50 degree mark. Overall conditions will be calm and dry.

Tonight, skies remain clear with overnight lows in the mid-20s.

Looking ahead, temperatures are going to continue to warm tomorrow and through the weekend. By Sunday, highs will be approaching close to the 80 degree mark.

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Snow early Tuesday then Thornton will dry out, remain chilly

Tuesday, March 30th, 2021 5:14am MDT

We are waking up to a light blanket of white today but that the snow won’t amount to much. It will be coming to an end later this morning and we will remain cold.

The day starts out with cloudy skies and light snow. The snow will be coming to an end by mid-morning and then the cloud cover will begin to break up a little bit. Additional accumulations will be minimal. High temperatures today will top out around the 40 degree mark.

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

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Monday to offer up mild temperatures but with a healthy dose of wind

Monday, March 29th, 2021 5:32am MDT

A bit of good and bad for Thornton’s weather today. While we will enjoy our warmest temperatures in weeks, we also will be subject to a good bit of wind.

The day starts off with sunny to mostly sunny skies and we will see similar throughout the daytime hours, a few more clouds in the PM. High temperatures today will climb to the low 70s. As for those winds, they will be gaining speed this morning and by early afternoon, gusts to 40mph or so will be possible.

Tonight, the wind will persist for much of the nighttime period but decreasing in speed. Overnight lows will drop to the low to mid-20s. A cold front arrives by late evening and with it we will have a chance for snow. Accumulations overnight, if any, will be light.

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March 28 to April 3: This week in Denver weather history

Sunday, March 28th, 2021 4:48am MDT

This Week in Denver Weather History

Looking at historical weather records can oftentimes provide insight into what weather we can expect over a given period of time.  As we saw this past week, while the calendar says spring, Old Man Winter can return very quickly.  Our look at this week in Denver weather history we see much of the same – major snowstorms and blizzards that impact travel and knock out power to residents.  Also, these spring snowstorms are often moisture-laden and their sheer weight can be damaging.


In 1951…heavy snowfall totaled 6.5 inches at Stapleton Airport where north winds gusted to 38 mph on the 27th and 41 mph on the 28th.

In 1972…heavy snowfall of 6.2 inches was measured at Stapleton International Airport…where northeast winds gusted to only 21 mph.

In 1980…a major blizzard struck the northeastern Colorado plains…closing both I-70 and I-76 to the east of Denver for a time.  Some areas received 1 to 2 feet of snow.  Drifts were 4 to 8 feet high.  The storm killed many young livestock.  At Stapleton International Airport…snowfall totaled 6.7 inches from the storm and north winds gusted to 29 mph.

In 2002…high winds developed in the foothills west of metro Denver.  Winds gusted to 81 mph near Fritz Peak…72 mph at Rollinsville…and 70 mph at Blackhawk.  West winds gusted to 51 mph on the 27th and to 45 mph on the 28th at Denver International Airport where the temperature warmed to a high of 69 degrees on the 28th.


In 1948…high winds raked Boulder.  A wind gust to 75 mph was recorded at Valmont.  Sustained winds in excess of 35 mph were estimated in Boulder.  Minor damage was reported.

In 1961…heavy snowfall totaled 9.5 inches at Stapleton Airport over the 3 day period.  Most of the snow…5.3 inches…fell on the 28th.  Winds were generally light and gusted to only 22 mph from the north.


In 1886…the lowest recorded temperature in March…11 degrees below zero…occurred.

In 1911…a thunderstorm produced snowfall of 0.4 inch…which was the only measurable snowfall of the month…making the month the second least snowiest March on record.

In 1962…a vigorous cold front produced strong winds across eastern Colorado.  North winds gusted to 46 mph at Stapleton Airport where visibility was briefly reduced to 3/4 mile in blowing dust.  A construction worker was injured in Aurora when he was struck by a windblown piece of plywood.


In 1891…rain changed to snow and totaled 9.7 inches in the city.  Northeast winds were sustained to 12 mph with gusts to 28 mph on the 28th.

In 1910…a strong cold front brought much wind…rain…and snow to the city.  Rain on the 28th changed to snow early on the 29th.  Snowfall totaled only 2.8 inches…but north winds were sustained to 50 mph on the 29th. Precipitation from the storm totaled 0.96 inch.

In 1994…moist upslope winds combined with an upper level system to dump 5 to 7 inches of snow along the eastern foothills and across metro Denver.  Snowfall totaled 6.3 inches at Stapleton International Airport where northeast winds gusted to 39 mph.  Thirteen inches of new snow were measured at the Eldora Ski Area west of Boulder.


In 1949…a major winter storm dumped 11.3 inches of snow over downtown Denver.  Snowfall totaled 10.4 inches at Stapleton Airport.  North to northeast winds were sustained to 17 mph.

In 1985…a slow moving snow storm moved across the state. Denver received only 4.0 inches of snowfall with amounts in the foothills totaling 1 to 2 feet.  Still…this was enough snow in Denver to cause flight delays of up to 6 hours at Stapleton International Airport on the night of the 29th. East winds gusted to 28 mph on the 28th.


In 1887…west winds sustained to 44 mph warmed the temperature to a high of 62 degrees.

In 1921…post-frontal northeast winds were sustained to 46 mph with gusts to 52 mph.

In 1925…southeast winds were sustained to 46 mph with gusts to 48 mph.  These were the strongest winds of the month that year.  The winds warmed the temperature to a high of 72 degrees.

In 1934…a construction worker was killed by lightning as he walked with a shovel on his shoulder along Cherry Creek in the city.  The thunderstorm produced light rain.

In 1967…a southwest wind gust to 52 mph was recorded at Stapleton International Airport.  The warm Chinook winds warmed the temperature to 79 degrees equaling the record for the date.

In 1979…a tornado touched down 4 miles southwest of Parker… But caused no reported damage.

In 1998…four children attending a birthday party in Denver were injured when an apparent dry microburst produced a sudden strong wind gust which blew an inflatable playhouse they were occupying into a neighbor’s yard.  The playhouse scraped the roof of the host’s two-story house…then landed in the adjoining yard.  The children were treated for minor head injuries and cuts.


In 1938…overnight heavy snowfall was 6.3 inches over downtown Denver.

In 1982…strong winds buffeted metro Denver…breaking windows and damaging roofs.  Wind gusts to 90 mph were recorded in Boulder and 51 mph at Stapleton Airport.  The strong winds flattened a condominium under construction in Lakewood.

In 1991…1 to 6 inches of snow fell across metro Denver with the heaviest snow confined to the foothills.  Six inches of snow was recorded at South Platte in the foothills southwest of Denver and 3 inches at Castle Rock.  Snowfall totaled only 0.7 inch at Stapleton International Airport where northeast winds gusted to 33 mph on the 29th.


In 1970…snowfall totaled 6.0 inches at Stapleton International Airport.  Heavy snow accumulation in Boulder on the 29th caused the collapse of a carport at an apartment building…damaging 11 automobiles.  Northeast winds gusted to 24 mph at Stapleton International Airport.


In 1895…rain changed to sleet…then snow…and totaled 8.0 inches in downtown Denver.  Strong post-frontal northeast winds were sustained to 48 mph with gusts to 61 mph. Temperatures hovered around 30 degrees all day.

In 1968…microburst winds associated with virga and brief light rain gusted to 46 mph at Stapleton International Airport.

In 1983…winds gusted to 82 mph at the National Center for Atmospheric Research in Boulder with peak gusts of 70 to 80 mph in the foothills.  Minor damage occurred at a construction site and to some homes in Boulder.  West winds gusted to 39 mph at Stapleton International Airport.

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

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Thornton’s weekend starts out cool and unsettled, then finally warms up

Friday, March 26th, 2021 4:54am MDT

A bit of a mixed bag of weather for us. Our third weak storm system of the week impacts us today but then we start to see things dry out and Sunday brings some real warmth.

For today, the passing system is not very strong so its effects will be limited. Mostly cloudy skies will be above with highs in the upper 40s. Light rain / sprinkles will be possible throughout the daytime hours. Early this AM and then this evening there may be some snow mixed in but no accumulations. Tonight, any showers will end by midnight and skies will be partly to mostly cloudy. Overnight lows will be in the mid to upper 20s.

Saturday finally sees things dry out but we will remain on the cool side. Highs will be in the lower 50s under mostly sunny skies. Saturday night, mostly clear skies will be above with overnight lows around 30 degrees.

Sunday finally sees us experience a bit of a warm up. Highs will be in the low to mid-60s under sunny skies. Overall conditions will be calm and warm.

Have a great weekend!

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