Category Archives: Thornton Weather

November 2025 top shots: Monthly photo slideshow

November 11, 2025 - A beautiful sunset on the Front Range. (David Canfield)
November 11, 2025 – A beautiful sunset on the Front Range. (David Canfield)

Typically November is a quiet weather month with plenty of nice, fall days but it can also turn wet with healthy doses of snow and moisture.  The wide variety of conditions can create picturesque scenes ranging from blue skies and snow-capped mountains to a wintry wonderland in the metro area.

November is the second snowiest month of the year so winter conditions are not unusual.  Typically though, these bouts of cold are short-lived and normal daytime conditions are pleasant.

Outdoor activities continue to be quite popular during the month.  The cooling temperatures do oftentimes lead to an increase in wildlife activity.

All of the above help lead to a month in which a wide variety of scenes, flora and fauna can be captured.

  • Slideshow updated November 29, 2025
  • 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!

October 2025 weather recap: Much warmer, much drier than normal

Thornton, Colorado's October 2025 Temperature Summary. (ThorntonWeather.com)
Thornton, Colorado’s October 2025 Temperature Summary. (ThorntonWeather.com)

Thornton’s first full month of fall for the year yielded lots of dry mild days. While that made for some pleasant conditions, it was exceedingly warm and dry.

The month started out with mercury readings in the 80s for the first four days then we cooled down. Three days with readings closer to normal followed as did some nice rain.

We then strung together more than two weeks of largely above average temperatures and very minimal precipitation. The final five days did cool down some and bring a little bit more rain.

Thornton’s overall average temperature for the month came in at 52.9 degrees. This was well above our running 19-year average for the month of 50.1 degrees. Temperatures ranged from a high of 87.8 degrees on the 3rd down to a low of 22.6 degrees on the morning of the 29th.

Out at DIA where Denver’s official measurements are taken, it was a bit warmer. The Mile High City saw an average temperature for the month of 53.5 degrees, well above their long term average for October of 51.1 degrees.

In terms of precipitation, it was lacking a good bit. Thornton recorded 0.56 inches in its rain bucket, the vast majority of it (0.50”) coming on the 5th and 6th. This was much less than our running October average of 0.94 inches.

At the airport, Denver was even drier. They saw a mere 0.14 inches in the bucket, far less than the Mile High City’s October average of 0.99 inches.

No snow was recorded in Thornton or in Denver. This already puts us at a deficit to start the snow season. On average, Thornton receives 3.6 inches in October.

Click here to view Thornton’s complete October 2025 climate summary report.

Thornton, Colorado's October 2025 Precipitation Summary. (ThorntonWeather.com)
Thornton, Colorado’s October 2025 Precipitation Summary. (ThorntonWeather.com)

Denver sets two high temperature records on November 2nd

Record High Temperature

It was ridiculously warm today, certainly something we would expect to see in early October, not November. The mercury readings resulted in Denver setting two records.

The high temperature, as measured at Denver International Airport, reached 83 degrees. This sets a new high temperature record for the date, besting the old record of 78 degrees set in 1931.

Also, the 83 degree reading sets a record high temperature for the month of November. The previous warmest November reading was 81 degrees on November 27, 2017.

Here in Thornton, we also topped out at 83 degrees. This was the warmest November 2nd and the warmest November reading overall in the 19 years this station has been in operation.

80 degree readings in November are a rarity. In fact, today’s is only the fifth in Denver since record keeping began in 1872.

83 – 11/02/2025
80 – 11/06/2021
81 – 11/27/2017
80 – 11/16/2016
80 – 11/08/2006

November 2025 preview: The transition to winter begins

November

The weather during the month of November in Denver metro area can offer just about anything.  While it is normally a quiet month, it can be prone to extremes.

November has historically been one of Denver’s snowiest months and major snowstorms are not entirely uncommon.  However conditions can also be quite dry.

Temperatures during the month continue to cool as we get closer to winter and by the end of the month the low temperatures routinely dip to 20 degrees or below.  At times it can in fact bring conditions more like what we see in January.

Get all the details on November’s weather and what we can expect in our complete preview here.

Time to “fall back” as Daylight Saving Time ends Sunday, November 2

Daylight Saving Time
The United States returns to Standard Time at 2:00am Sunday as Daylight Saving Time comes to an end.

The biannual ritual of changing our clocks to adjust for Daylight Saving Time occurs this weekend, providing yet another signal of the changing of seasons.  The United States will ‘fall back’ one hour at 2:00am Sunday morning as we return to Standard Time.

The ritual of changing our clocks twice a year can be met with some resistance as some people struggle to adjust their body’s internal clock.  Others actually like the return to standard time as they get to enjoy an extra hour of sleep.

The time change definitely has big effects on the dawning of daylight and how early it gets dark in the evening.

Sunrise on Saturday occurs at 7:29am but on Sunday it will be at 6:30am. Similarly, sunset will occur at 5:57pm on Saturday but on Sunday the sun will disappear over the horizon at 4:56pm.

For many this means that when they get home from work it will now be dark and outdoor activities will be significantly curtailed as a result.

Arizona and Hawaii are the only states that do not observe Daylight Saving Time and remain on Standard Time year round.  The U.S. territories of Puerto Rico, American Samoa, Guam, Northern Mariana Islands, and the United States Virgin Islands also do not observe the event.

It won’t be all that long though before Daylight Saving Time returns.  On March 8, 2026 we will ‘spring forward.’

Daylight Saving Time Schedule

The mandated beginning and end of Daylight Saving Time has changed in the United States over the years.

The most recent schedule was set by the Energy Policy Act of 2005 and took effect in 2007.  We now ‘spring forward’ to begin Daylight Saving Time on the second Sunday in March and ‘fall back’ with the return to Standard Time on the first Sunday in November.

Daylight Savings Time Dates

Year DST Begins 2 a.m.
(Second Sunday in March)
DST Ends 2 a.m.
(First Sunday in November)
2025 9 March 2025 2 November 2025
2026 8 March 2026 1 November 2026
2027 14 March 2027 7 November 2027
2028 12 March 2028 5 November 2028
2029 11 March 2029 4 November 2029

October 2025 top shots: Monthly photo slideshow

October 9, 2025 - A beautiful fall scene. (Bill Hutchinson)
October 9, 2025 – A beautiful fall scene. (Bill Hutchinson)

October in Thornton can bring a wide variety of weather conditions, perfect for the photographer in all of us.

The month brings the changing of the colors at Colorado’s lower elevations and it is also is typically when we see our first freeze and first snow.

Couple those facts with our usual widely varying landscapes and wildlife and we have a month that is sure to bring in plenty of photo opportunities.

  • Slideshow updated October 26, 2025
  • 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!

ThorntonWeather.com enters its 20th year of operation

ThorntonWeather.com enters its 20th year of operation. (AI image generated with CoPilot)
ThorntonWeather.com enters its 20th year of operation. (AI image generated with CoPilot)

From a random anniversary gift to becoming Colorado’s longest running independent source for weather news and data. Crazy, eh?

It was 19 years ago on October 25, 2006, that ThorntonWeather.com went live and the first bits of live weather data from our weather station were fed to the Internet.

My wife had gotten me a home weather station for our anniversary a few months earlier. It was fun to be able to see what the weather conditions were right where we lived in Thornton – not DIA or downtown Denver where conditions can be dramatically different.

It didn’t take long though and I soon desired more. I wanted to be able to monitor that weather station from anywhere and thus, with the help of the home weather station community, created the first version of the website.

  • Did you know ThorntonWeather.com is a completely non-profit venture run by a Thornton resident?  We are self-funded but do occasionally receive help from members of the community, something which allows us to keep things up and running. Learn more about how you can help here.

Word soon got out among residents of the north Denver metro area and traffic to the site boomed. Stories in print media helped spread the word.

We are proud to have become a valuable resource for the community providing real time weather data, forecasts, historical climate information, satellite imagery, webcams and so much more.

We’re just ‘weather geeks’ that love the weather and love our community.  Running ThorntonWeather.com can be a bit expensive and it is time consuming to maintain and operate it but it is worth it.

We’d like to thank all of our visitors for your support in the past and we look forward to continuing to be the best, truly local source for Thornton weather.

Throwback Thursday: Images of the June 15, 1988, tornado outbreak in Denver.

June 15, 1988 - Tornadoes strike Denver, Colorado. (ThorntonWeather.com)
June 15, 1988 – Tornadoes strike Denver, Colorado. (ThorntonWeather.com)

This was a fun find! I was going through old family photos and came across these images of a famous – and destructive – Denver weather event.

At that time, I was staying with my sister at her house on Fox Street near 96th Ave in Thornton. The weather was clearly getting spicy and where she lived provided clear views to the south and southeast.

We were amazed to watch multiple twisters strike in and around the city, me grabbing pictures with my old 35mm Canon AE-1 Program.

The National Weather Service history for the event describes “several” tornadoes. The most powerful was an F3 that struck in south Denver and was on the ground for 25 minutes. That twister alone damaged 85 buildings and many vehicles. Miraculously, no serious injuries or deaths were reported.

Below see more pictures I took that day and you can read the official account from the NWS and watch some archived news stories from the day.

From the National Weather Service:

In 1988…several tornadoes developed across metro Denver. One tornado touched down just northeast of the rocky mountain arsenal. The twister moved very slowly and did no damage…except to demolish a small electrical substation… Even though it was on the ground for nearly 30 minutes. Later…another tornado was sighted east of Brighton about 2 miles north of Barr Lake. An f2 tornado cut a swath through northeast Denver. The main path went through a thickly wooded area for about 6 blocks and uprooted about 500 city owned trees…many of them large elms 75 to 100 years old. Hundreds of privately owned trees were also sucked from the ground by the slow moving twister…which was filmed by a news team in a helicopter as it uprooted trees. The replacement cost to the city owned trees was estimated at 1.5 million dollars. The twister did little damage to buildings. Some homes suffered roof and chimney damage…a gas main was ruptured…and some cars were damaged by falling trees. The uprooted trees also caused curb and sidewalk damage and cut some electrical wires. The funnel cloud passed close to Stapleton International Airport. Aircraft operations were shut down…and the tower was evacuated. The tornado was on the ground for almost 25 minutes. An f3 tornado cut an erratic path through south Denver for about 25 minutes…causing extensive damage in at least 3 areas. The twister damaged about 85 buildings… 20 severely; the total loss was estimated at 5 to 10 million dollars. Many cars were severely damaged; at least 15 vehicles were overturned. One trailer was lifted onto the top of a building that had just been unroofed; numerous antique cars inside the building were damaged. A Ford Bronco was blown over a church…and landed 100 yards away. A metal storage shed was deposited far above the ground in some power lines. The tornado uprooted many trees on a golf course. No one was seriously hurt…although seven people suffered minor injuries from flying debris. A golfer was thrown 40 feet…but was not hurt; a man clinging to a telephone pole was unscathed…but lost both shoes…a sock…and buttons off his shirt. A woman holding a baby was sucked through a broken convenience store window… But was unhurt. A dog…tethered to the ground by its leash… Was suspended in the air by the twister. Uprooted trees crushed cars and damaged curbs and sidewalks. People in downtown Denver could see three tornadoes occurring simultaneously. Hail as large as 1 3/8 inches in diameter fell in extreme southeast Aurora.

September 2025 Weather Recap: Temps near normal, precipitation well above average

Thornton, Colorado's September 2025 temperature summary. (ThorntonWeather.com)
Thornton, Colorado’s September 2025 temperature summary. (ThorntonWeather.com)

Thornton was finally able to break out of the hot, dry weather pattern of recent months and see things get a bit more normal. September historically is one of our most pleasant months and 2025 largely held true to that.

We did start out pretty mild and precipitation was meager for the first half of the month. Finally, on the 13th, we began to see things cool down and then on the 16th got a nice shot of rain (0.61”).

The rest of the month offered mild but comfortable temperatures. A strong trough on the 23rd cooled us considerably with that day offering high temperatures nearly 20 degrees below normal. It also brought a very healthy shot of rain (1.21″).

In the end, the average temperature for the month of September ended up very close to average. Thornton’s average for the month was 64.6 degrees. This was just a hair higher than our 19 year running average for the month of 64.3 degrees. Our maximum temperature for the month was 92 degrees and came on the 10th. Our coolest reading of 42.3 degrees was on the 25th.

For Denver, at Denver International Airport where the Mile High City’s official measurements are taken, temperatures were on par with ours. They reported an average for the month of 64.7 degrees. This was close to their long term average for September of 64.8 degrees.

In terms of precipitation, Thornton saw a notable 2.09 inches for the month. This was far above our 19-year running average of 1.51 inches for September. This was the fourth wettest September over that period.

The Mile High City was quite a bit drier with 1.35 inches recorded in their rain bucket. It was, however, above their long term average for the month of 1.09 inches.

No snow was recorded in Thornton or Denver for the month.

Click here to view Thornton’s complete September 2025 climate summary report.

Thornton, Colorado's September 2025 precipitation summary. (ThorntonWeather.com)
Thornton, Colorado’s September 2025 precipitation summary. (ThorntonWeather.com)