Thornton, Colorado, USA
UpdatedThu, 07-Jul-2022 2:40am MDT 


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Tuesday in Thornton to warm up, give a bit of a chance for showers

Tuesday, May 3rd, 2022 5:17am MDT

Somewhat of a typical day for this time of year. We will enjoy temps near normal, a good bit of sun and then a chance for showers.

The day does start off with a good bit of cloud cover. That will ease through the morning and afternoon will bring mostly sunny skies. High temperatures will top out in the mid-60s, near the average high for the date of 66 degrees. The afternoon offers just a slight chance for a sprinkle of rain.

This evening, an approaching system will make itself felt with winds picking up and clouds increasing. We will have a better chance for rain after 6:00pm and through the night although it doesn’t look like precipitation will amount to much. Overnight lows will be in the upper 30s.

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Thornton receives much-needed rain, a few showers, cooler temps for Monday

Monday, May 2nd, 2022 5:13am MDT

Whoohoo! Our rain dance finally worked!

As of 4:00am, Thornton had received 0.14 inches of wonderful rain since midnight. That isn’t much, in fact it is less than you usually put on your lawn in a single watering, but it is very welcome.

For today, some sprinkles / scattered showers will be seen this morning with things tapering off after about 10:00am, ending entirely around noon. We will have a pretty solid layer of clouds for much of the day with some sun peeking out in the afternoon. Temperatures today will be cool with highs in the mid to upper 40s.

Tonight, lows will drop to freezing, perhaps a bit below, under mostly cloudy skies.

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Thornton’s weekend starts with wind, high fire danger then will settle down, perhaps offer rain

Friday, April 29th, 2022 4:46am MDT

A little bit of bad and good in the three-day outlook. We start off with a good bit of wind and elevated fire danger but then will settle down and finally close things out with (fingers crossed) some rain.

Friday looks to be the most concerning day of the forecast. We will have mostly sunny skies and highs in the mid-60s. However, winds are going to be picking up this morning and becoming quite strong. This will lead to elevated fire danger and as such a Red Flag Warning will be in effect. Tonight, winds will ease but remain quite breezy. Overnight lows will be in the mid to upper 30s under mostly clear skies.

Saturday is going to offer up lots of blue sky above. Temperatures will warm to the mid to upper 60s. Winds will be breezy but not near as bad as today. Saturday night, mostly clear skies will be above with lows in the mid-30s. Winds will calm down after dark.

Sunday will be the warmest day of the period with highs in the lows 70s under mostly sunny skies. The afternoon brings a bit of a chance for a shower but then, in the evening and overnight Sunday night into Monday morning, we have a good chance for showers.

Have a great weekend!

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Thursday in Thornton to offer up a good bit of sun, very mild temperatures

Thursday, April 28th, 2022 4:23am MDT

A fine looking day ahead for us. Expect to enjoy largely calm conditions, a few clouds and temperatures well above normal.

Mostly sunny skies will be above throughout the day although with varying levels of clouds. Conditions will be calm and dry with some breezy winds expected in the afternoon and evening. High temperatures today are going to push close to the 80 degree mark.

Tonight, partly cloudy skies will be overhead with lows dipping to the mid-40s.

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April 24 to April 30: This week in Denver weather history

Wednesday, April 27th, 2022 5:04pm MDT

This Week in Denver Weather History

Weather in Colorado is always interesting but springtime can bring the entire gamut of conditions. Looking back at this week in Denver weather history we see just how varied this time of year – from flooding rains to heavy snowfall to severe thunderstorms it can and has all happened.

From the National Weather Service:


In 2010…a potent spring storm brought heavy… Wet snow to areas in and near the Front Range Foothills and widespread rainfall across the adjacent plains. In the Front Range Foothills and North-Central Mountains east of the Continental Divide…storm totals ranged from 15 to 30 inches. Storm totals included: 29.5 inches…3 miles southeast of Pinecliffe; 27 inches…8 miles northeast of Four Corners; 23 inches at Willow Creek; 22.5 inches… 13 miles northwest of Golden; 21 inches at Never Summer; 17 inches at Eldorado Springs; 16.5 inches…3 miles west of Jamestown. Denver International Airport reported just a trace of snowfall…but measured 2.01 inches of rainfall for the duration of the storm. In addition…a peak wind gust to 54 mph from the northwest was observed at the airport on the 23rd


In 1883…snowfall totaled 7.6 inches in downtown Denver.

In 1904…a thunderstorm produced hail during the late evening of the 23rd. Apparent post-frontal rain changed to snow during the early morning of the 24th…but totaled only 2.0 inches. Precipitation consisting of rain…melted hail…and snow totaled 0.60 inch. Northeast winds were sustained to 41 mph with gusts as high as 52 mph on the 24th.

In 1905…rain changed to snow and totaled 8.0 inches. Much of the snow melted as it fell with only 2.5 inches measured on the ground. Precipitation totaled 1.88 inches. Northeast winds were sustained to 20 mph on the 23rd.

In 1942…the South Platte River reached flood conditions in the city. As many as 15 thousand residents were warned to evacuate their homes temporarily. Two lives were lost in the city. Four bridges were washed out by the flood waters and other bridges were endangered. The damage was generally limited to bridges that were in poor condition. However…the flood waters did not overflow their channel banks within the city limits.

In 1980…heavy rain began in the eastern foothills on the night of the 23rd and turned to heavy wet snow on the 24th. Up to a foot and a half of snow fell in the foothills west of Denver. At Stapleton International Airport precipitation totaled 1.58 inches…but only 3.7 inches of snow fell from the storm. East winds gusted to 24 mph.

In 1997…locations in and near the foothills received the greatest snow of the year as a winter-like storm system moved into metro Denver. East to southeast winds at speeds of 15 to 35 mph were common with even stronger gusts above 9 thousand feet. Snow fell at a rate of 2 to 3 inches an hour as deep upslope combined with a moist and unstable air mass. The snow began in the foothills above 7500 feet during the evening of the 23rd. By sunrise the snow level had dropped to 5000 feet. The hardest hit areas extended from I-25 into the foothills. Snowfall totals in the foothills ranged from 1 1/2 to over 3 1/2 feet. In the city…snowfall ranged from 8 to 18 inches. Some snowfall amounts included: 36 inches at Coal Creek Canyon; 31 inches at Nederland and Wondervu; 20 to 24 inches near Blackhawk… At Echo Lake…and North Turkey Creek Canyon; 15 to 19 inches at Boulder…central city…conifer…Evergreen…Georgetown… And Louisville; 8 to 14 inches in Arvada…Broomfield… Westminster…Wheat Ridge…Castle Rock…and Ken Caryl Ranch. Only 2.3 inches of snow fell at the site of the former Stapleton International Airport on the 24th. East winds gusted to 36 mph at Denver International Airport on the 24th.

In 2003…a strong and deep northerly flow circulating around a closed upper low pressure center allowed heavy snow to fall in the mountains and eastern foothills. Snowfall totaled 14 inches in Idaho Springs. Rain was mixed with snow and thunder across metro Denver. Snowfall was only 0.9 inch overnight at the site of the former Stapleton International Airport. Precipitation totaled 1.34 inches at Denver International Airport…where northwest winds gusted to 55 mph on the 23rd.

In 2007…a storm system intensified over southeast Colorado… Allowing for heavy snow and rain to develop over much of north-central and northeast Colorado. Severe thunderstorms preceded the storm system on the 23rd…affecting the urban corridor. Nickel size hail was reported in Boulder and a small landspout touched down near Byers. On the 24th…heavy snow fell in the foothills west of Denver and Boulder…where storm totals ranged from 1 to 2 feet. Heavy snow also occurred along the palmer divide…with storm totals of 10 to 16 inches. Elsewhere…a steady moderate to heavy rainfall was reported. Denver International Airport measured 2.09 inches of rainfall…which shattered the previous 24-hr record of 1.29 inches for the 24th of April. The heavy wet snow caused several power outages. In some instances it took several days to restore power. Several road closures were reported…including interstates 25 and 70. A jackknifed semi-trailer backed up traffic for nearly 20 miles…on southbound I-25…between Denver and Colorado springs. In addition…a 50-ton Boulder blocked the southbound lane of State Highway 285…near Parmalee Gulch. Crews had to use explosives to break up the Boulder and clear the debris. Stranded buses and impassable roadways also forced several school closures.


In 1935…heavy wet snow fell across metro Denver. The storm started as rain on the 23rd and changed to snow early on the morning of the 24th. There was continuous precipitation for a period of 48 hours. Snowfall totaled 19.0 inches over the city and 20.0 inches at Denver municipal airport. However… Due to warm temperatures in the 30’s…much of the snow melted as it fell and did not seriously disrupt traffic. The greatest snow accumulation on the ground downtown was 12 inches…but it quickly melted. The highest sustained wind speed recorded during the storm was 28 mph from the north on the 23rd. The storm contained 3.16 inches of moisture.


In 1959…wind gusts to 60 mph recorded in downtown Boulder caused very limited minor damage. West winds gusted to 38 mph at Stapleton Airport.

In 1986…a wind gust to 60 mph was clocked at Golden Gate Canyon.

In 1989…1 3/4 inch diameter hail was reported in Lafayette. Boulder and Louisville reported 3/4 inch hail.
24-25 in 1890…rain changed to snow and totaled 7.0 inches in downtown Denver.

In 1931…heavy snowfall totaled 9.3 inches over downtown Denver. Winds were light during the storm.

In 1996…the second wind storm in less than a week developed east of the continental divide and spread over metro Denver. High winds gusted from 60 to 90 mph. Several power lines and poles were downed. Some of the stronger wind gusts included: 91 mph atop squaw mountain west of Denver…90 mph atop Table Mesa near Boulder…85 mph in Golden Gate Canyon…and 82 mph at Wondervu. Northwest winds gusted to 41 mph at Denver International Airport on the 25th.


In 1924…post-frontal rain changed to snow…which became heavy and totaled 10.2 inches over downtown Denver. The greatest amount of snow on the ground was 6.0 inches on the 25th due to melting. North winds were sustained to 38 mph with gusts to 42 mph on the 24th.


In 1902…northeast winds were sustained to 42 mph with gusts to 48 mph.

In 1908…north winds were sustained to 40 mph behind an apparent cold front. Snowfall was 0.5 inch.

In 1928…rain changed to snow…which became heavy and totaled 7.4 inches in downtown Denver. Due to melting…the maximum snow depth on the ground was 4.0 inches at 6:00 pm. This was the last snow of the season. Southeast winds were sustained to 19 mph with gusts to 20 mph.

In 1976…a south wind gust to 54 mph was recorded at Stapleton International Airport. The high winds toppled a 70-foot high cottonwood tree onto the rear of house and a neighboring residence in central Denver.

In 1989…lightning caused heavy damage to a radio transmitter in Parker…knocking a Denver area radio station off the air for 3 hours.

In 1994…weather spotters reported dime-size hail at the intersection of U.S. Highway 287 and c470 in Jefferson County. Marble-size hail covered the ground near Golden to a depth of 1 inch. Pea-size hail was reported covering the ground to a depth of 3 inches in Arvada.

In 2016…a severe thunderstorm produced hail up to one inch in diameter near Castle Rock.

» Click here to read the rest of April 24 to April 30: This week in Denver weather history

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Mild temperatures, just a slight chance for a shower Wednesday

Wednesday, April 27th, 2022 5:05am MDT

Thornton will once again enjoy temperatures well above normal today. A weak disturbance is going to increase the cloud cover though and we have a bit of a chance for a shower.

We start off with some sun but then cloud cover will build with the majority of the day seeing mostly cloudy skies. Those clouds won’t do much to inhibit temperatures as highs will top out in the mid-70s.

Mid to late afternoon will see winds become a bit breezy and there will be just the slightest chance for a shower. Unfortunately, it appears the showers will likely be high-based and evaporate before hitting the ground though.

Tonight, cloud cover will ease some and conditions will be calm. Overnight lows will be in the low to mid-40s.

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April 2022 top shots: Monthly photo slideshow

Wednesday, April 27th, 2022 3:11am MDT
April blooms and a bee in Thornton. (LE Worley)

April blooms and a bee in Thornton. (LE Worley)

April can be a tricky month weather-wise with everything from mild temperatures to snow to severe weather being possible.  The good thing about that is that it provides plenty of chances for great photos!

April marks a transition between winter and summer for most of the country but for Denver it is especially true as we can see a stunning variety of weather.

The proverbial April showers are certainly a possibility for Denver. Snow? Tornadoes? Thunderstorms? You bet – all can happen!

Throw in our usual wildlife plus the wide variety of birds that return to the Centennial State for the spring and summer and there is a lot going on.

  • Slideshow updated April 25, 2022. 
  • 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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Temperatures warm up in Thornton, conditions remain dry

Tuesday, April 26th, 2022 4:58am MDT

We will enjoy a mild day today with mercury readings well above normal. There will be some cloud cover and it will continue to be dry.

The day starts off with sunny skies but then moisture aloft will increase leading to some cloud cover from mid-morning forward. Winds will be light and out of the south. High temperatures will be topping out in the mid-70s.

Tonight, lows will dip to the mid-40s under partly cloudy skies.

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Cool temperatures, calm conditions start Thornton’s workweek

Monday, April 25th, 2022 4:57am MDT

Not too bad of a way to start the workweek. Temperatures will be near normal today with some of that Colorado blue above and overall calm conditions.

We start out with a good bit of cloud cover but then will see that ease. Overall, mostly sunny skies will be the rule today. Winds will be relatively light, conditions dry. High temps will top out near the 60 degree mark.

Tonight, skies will be mostly clear with overnight lows close to the freezing mark.

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Denver breaks high temperature record for April 22

Friday, April 22nd, 2022 5:44pm MDT

Record High Temperature

We knew it was going to be extraordinarily warm and blustery today, particularly for April. The numbers bear it out as Denver set a record high temperature for the date, one that also tied for the second warmest April reading on record.

As measured at Denver International Airport, the Mile High City topped out at 89 degrees. That bests the previous record high for April 22nd of 88 degrees set in 1989. The reading was also the second warmest April temperature recorded in Denver history coming in second to a 90 degree reading on April 30, 1992.

Here in Thornton we were just a hair cooler with a high of 88 degrees.

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