Yet another month in the books with mercury readings well above average and precipitation lighter than average. In fact, November 2025 goes into the books as the warmest and second driest November in Thornton of the past 19 years.
During the month there was a complete lack of notable weather events – beyond the warmth and dryness. It wasn’t until the third week of the month that we saw any precipitation and then it was a minimal amount of rain.
On the 28th, we finally received our first snowfall of the season, but it was a meager amount (0.6 inches). It also was the second latest first seasonal snowfall ever recorded in Denver.
Overall, Thornton’s November 2025 average temperature was 45.8 degrees. This is far above our 19-year running average temperature for November of 39.9 degrees. It also makes the month the warmest November recorded over that same period.
For Denver, as recorded at Denver International Airport, it was similarly mild. The average temperature was 45.1 degrees. This was 5.7 degrees above the city’s long-term average.
Precipitation was pitiful for the month. Thornton recorded a mere 0.05 inches during the month. This is far below our running average for November of 0.52 inches.
The Mile High City recorded 0.09 inches of precipitation in their bucket. This is far below Denver’s long-term average for November of 0.64 inches.
As previously stated, snow was virtually non-existent during the month. The 28th offered the first snow of the season in Thornton and only totaled 0.6 inches. The month’s total fell far short of our 19-year average of 5.9 inches.
Denver recorded only 0.2 inches of the white stuff at DIA. This was far below the 7.3 inch average for November in the Mile High City.
Click here to view Thornton’s complete November 2025 climate summary report.
