Thornton, Colorado, USA
UpdatedThu, 20-Jan-2022 7:00am MST 


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July 2021 top shots: Monthly photo slideshow

Wednesday, July 28th, 2021 6:12pm MST
July 2,2021 - Absolutely gorgeous skies over Margaret Carpenter Park. (LE Worley)

July 2,2021 – Absolutely gorgeous skies over Margaret Carpenter Park. (LE Worley)

Colorado offers outdoor opportunities unlike any other state and while the summer heat settles in, photos of the amazing scenes across our state provide a view into why we love it here so much.

The weather this time of year has a pretty standard pattern of quickly warming temperatures followed by afternoon thunderstorms that can cool things down.  These storms sometimes provide a good bit of ‘excitement’ and are a prime photo subject.

  • Slideshow updated July 25, 2021

Recreationalists head outdoors and take advantage of urban, suburban and rural opportunities.  As they do, our abundant wildlife that is found just about anywhere comes into focus.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather and nature related imagery.   Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted.

To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

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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Denver sets new record high temperature for July 28

Wednesday, July 28th, 2021 5:11pm MST

Record High Temperature

Another high temperature record in the books for summer 2021.

As measured at Denver International Airport, the Mile High City’s temperature topped out at 100 degrees today. This easily bests the record high for the date of 98 degrees set 145 years ago in 1876.

Here in Thornton, we matched the 100 degree mark. This was our fifth 100+ degree day of the year in Thornton, more than any other year in the past 15 since Thornton Weather came online.

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Potentially record-setting heat on tap for Thornton’s Wednesday

Wednesday, July 28th, 2021 4:53am MST

The mercury just keeps on climbing. Today looks to be the hottest day of the week, one that may break a record.

Sunny skies with some haze will be above throughout the daytime hours. Conditions will be calm and dry. Temperatures will be hitting the upper 90s. Denver’s record high for the date is 98 degrees, set 145 years ago in 1876, and that mark may very well fall.

Tonight, skies will be mostly clear with lows in the mid-60s.

Looking forward, we will have a couple more days with hot temps then this weekend should see things cool down.

Keep an eye on the temperatures with our live weather gauges here.

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Tuesday to offer up sunny skies, hot temperatures

Tuesday, July 27th, 2021 4:53am MST

Not much change in our forecast for today versus what we have seen in recent days. We will have clearer skies and temps will again be above normal.

Sunny skies start us off and will continue throughout the day. Overall conditions will be calm and dry. High temperatures today will again reach the mid-90s, a good bit above the average high for the date of 90 degrees.

Tonight, lows will be in the mid-60s under mostly clear skies.

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Toasty temperatures for Monday, more of the same for the workweek

Monday, July 26th, 2021 5:07am MST

With a ridge building, we will once again find ourselves stuck with very warm, relatively dry conditions. There is, however, hope for relief this coming weekend.

For today, A few clouds will be around early then those will clear leading to sunny skies for the balance of the day. Highs today will be topping out in the mid-90s.

Tonight, it will be mostly clear above with lows in the low to mid-60s.

Looking ahead, that ridge will dominate things leading to continued hot weather through Friday. At that point, it appears the ridge will break down ushering in cooler temperatures and a better chance for precipitation. See the extended weather forecast for details.

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July 25 to July 31: This week in Denver weather history

Sunday, July 25th, 2021 5:08am MST

This Week in Denver Weather History

Colorado’s unofficial severe weather season is during the months of May and June.  However, as we look back in Denver weather history, we see that July can oftentimes hold its own.  Many occurrences of flooding, scorching heat, and even tornadoes have been recorded.  Most notably, this week marks the 24th anniversary of the Big Thompson Flood – Colorado’s deadliest weather disaster ever.


In 1934…a streak of 15 consecutive days of 90 degrees ranked 5th on the list of hot streaks.  The record of 24 consecutive days was established in the summer of 2008.


In 2008…a streak of 24 consecutive days of 90 degrees shattered the previous record of 18 consecutive days established in 1901 and 1874.   Ironically…no new single day record high temperatures were set in the month of July. In August however…a record of 104 degrees was set on the 1st…and another record of 103 degrees was set on the 2nd. In addition…a record low min of 70 degrees was set on August 2nd.


In 1987…a streak of 16 consecutive days of 90 degrees ranked 4th on the list of hot streaks.  The record of 24 consecutive days was established in the summer of 2008.


In 1965…heavy showers and thunderstorms doused metro Denver with significant rain each day.  Rainfall for the six days totaled 5.16 inches at Stapleton International Airport. Massive rainfall occurred on the 20th…21st…and 25th… Flooding streets and basements and causing streams to overflow.  The heaviest rainfall…2.05 inches…at Stapleton International Airport occurred on the 25th.


In 2003…maximum temperature of 100 degrees on the 24th was a record high for the date.  Low temperature of 73 degrees on the 25th was a record high minimum for the date.


In 1875…brief heavy rain and hail lasted only 5 minutes… But the 1/4 inch diameter hail covered the ground to a depth of 1/2 inch and made the streets look like there had been snowfall.  There was much crop damage…especially to corn…and some sheep were killed.  Precipitation totaled 0.51 inch in the city.

In 1896…a heavy thunderstorm produced sustained northwest winds to 45 mph with gusts to 50 mph and 1.02 inches of rain.

In 1965…a cloudburst dumped 1.99 inches of rain in 30 minutes at Stapleton International Airport.  The storm was accompanied by strong winds gusting to 70 mph.  The heavy rain flooded numerous streets in east Denver and Aurora. One inch diameter hail accompanied a cloudburst…9 miles southwest of Denver.  A funnel cloud was sighted 25 miles northwest of Denver.  In Aurora…there were unofficial reports of 2.30 inches of rain in 40 minutes and 3.30 inches of rain in 30 to 40 minutes.  Rainfall totaled 2.05 inches at Stapleton International Airport.  Rainfall of 2.42 inches for 24 hours on the 24th and 25th was the second greatest on record for July.

In 1977…a tornado touched down briefly in Aurora southeast of Cheery Creek Reservoir.  No damage was reported. A funnel cloud was sighted for 4 minutes by national weather service personnel 10 miles north of Stapleton International Airport near Henderson.

In 1991…heavy rain…up to half an inch in 10 minutes…caused flooding in Westminster…Northglenn…and north Denver where a section of railroad track was washed away.  At Stapleton International Airport…heavy thunderstorm rain totaled 1.85 inches and briefly reduced the visibility to 1/4 mile. Hail to 1/8 inch in diameter was also measured.  A tornado touched down briefly near Fort Lupton.  No damage was reported.

In 1998…heavy monsoonal thunderstorm rains caused flooding and flash flooding in eastern and southern sections of metro Denver…including Englewood and Aurora…when about 2 to 3 inches of rain inundated the area.  Both I-25 and I-70 were closed for 2 to 3 hours as several low lying areas became impassable due to the high waters.  The water was estimated to be 15 feet deep in one flooded underpass along I-25.  As a result…the freeway was closed from south of 6th avenue to university blvd.  Standing water forced the closure of I-70 at gun club road east of Denver.  In Englewood…U.S. Highway 285 was closed…when high water made it impassable.  Several cars were reportedly floating down the roadway near Sheridan Blvd.  In Aurora…the intersection at Yale Ave. And chambers rd. Was flooded by high water up to 4 feet deep when a spillway on the high line canal was breached.  Lightning also knocked out 11 transformers across metro Denver…causing several small fires and scattered power outages.  Flood and flash flooding also occurred north of Strasburg when as much as 2.51 inches of rain fell in an hour.  The deluge resulted in considerable flooding of local streets and County roads.  Torrential rainfall of 2 to 3 inches in less than an hour triggered a flash flood in Virginia Canyon.  County Road 279 between Idaho Springs and Central City was closed for two days to clear debris from mudslides.  Several cars in Idaho Springs were washed off the road…and numerous basements were flooded in town.  Thunderstorm rainfall totaled 2.69 inches at Denver International Airport.

In 2001…lightning struck two homes in Lafayette…damaging the roof and attic of one and shorting out the electrical system in another.  Hail to 1 3/4 inch in diameter was measured 7 miles north of Castle Rock with 3/4 inch hail 7 miles north of Sedalia.

In 2005…heavy thunderstorm rain in the vicinity of the overland wildfire burn scar triggered a mudslide in Jamestown.  Rocks the size of bowling balls…along with silt and mud slid down the mountain into the town.  No one was injured.  One parked car was buried by the debris.

In 2006…heavy thunderstorm rainfall caused flash flooding 1 mile north of the town of Westcreek in southwestern Douglas County.  Several maintenance roads were washed out by the floodwaters.

» Click here to read the rest of July 25 to July 31: This week in Denver weather history

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Thornton’s weekend to see the monsoon start to kick in, offer increased chance for storms

Friday, July 23rd, 2021 5:02am MST

A bit of a break from the heat for us this weekend, finally. We also will see some of that monsoon moisture that has been hitting the mountains work its way to lower elevations.

For Friday, it will be the hottest day of the week. Mostly sunny skies start us off and highs will be in the low-90s. This afternoon brings a decent chance for storms, particularly closer to evening. Overnight tonight, partly clear skies will be above with just a slight chance for a lingering shower.

Saturday will see cloud cover increase as moisture aloft increases as well. Highs will be in the upper 80s under partly clear skies. The afternoon will once again bring chances for thunderstorms. Saturday night into Sunday morning, skies will clear and any storm activity will end by midnight. Overnight lows will be in the low 60s.

The weekend closes out quite nicely. Look for mostly sunny skies Sunday with highs right near average for the date of 90 degrees. Some scattered thunderstorm activity can be expected in the afternoon. Have a great weekend!

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Thursday brings another day of above normal temps, just a slight chance for storms

Thursday, July 22nd, 2021 5:14am MST

No real change from recent weather today as we will continue to be quite warm. Unfortunately, thunderstorm chances are a bit slim but at least we should see less smoke.

Sunny to mostly sunny skies will be above this morning then a gradual increase in cloud cover follows this afternoon. Some isolated thunderstorm activity will be seen in the afternoon and evening although coverage will not be great. Highs today will again reach the mid-90s.

Tonight, any storm activity will end not long after dark then skies will be partly clear. Overnight lows will be in the mid-60s.

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Wednesday remains very warm, does finally offer a chance for thunderstorms

Wednesday, July 21st, 2021 5:03am MST

Today will continue our very warm, smoky weather. On the plus side, we do stand at least a chance for some thunderstorms.

Mostly sunny but hazy skies start us off this morning. The afternoon and evening will see cloud cover increase. High temperatures will again be topping out in the low to mid-90s. After noon, scattered thunderstorms are expected to develop, offering some relief from the heat and, hopefully, some moisture.

Tonight, a stray storm or two will still be possible until about midnight. After that, skies will begin to clear. Overnight lows will be in the mid-60s. Keep an eye out for those storms here.

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Tuesday temps remain hot, smoke will continue to intrude

Tuesday, July 20th, 2021 4:57am MST

Today’s weather forecast looks much like yesterday’s. Temperatures will be a good ways above normal and hazy skies from smoke will be above.

Mostly sunny skies will be above although they will be obscured by patchy wildfire smoke. Overall conditions remain dry. Highs will be topping out in the mid-90s.

Tonight, the smoke should ease some and mostly cloudy skies will be above. Lows will be in the mid-60s.

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