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.
