
Heading into the last few days of the month, Thornton had seen a March with very warm temperatures and little moisture, so much so that the month was likely going to be in the warmest and driest. Then, in the last few days of the month, Mother Nature opened the spigot and finally delivered some much-needed precipitation, saving the month from at least one of those marks.
We started out the month with three mild days and temperatures well above normal. We then cooled down and the seventh was chilly with a high of only 33 degrees. Two the first seven days did also bring some light precipitation.
After that, we settled in for a long haul of dry weather with 21 days straight of no precipitation. Temperatures during those three weeks were largely above average with many days seeing highs of 65 degrees or warmer and a few 70+ degree readings.
Late in the day of the 28th, things began to change, at least for precipitation. The 29th brought over an inch of rain and more came on the 30th. Were it not for that, the month would have been one of the driest Marches on record. We did also receive our one and only snowfall during that period although it was quite minimal.
Temperatures never did really chill out and the month came in with average readings far above normal for March.
Overall, March 2025 came in with an average temperature of 47.2 degrees in Thornton. This was well above Thornton’s running 18-year average for March of 42.3 degrees. It put the month into the books as the third warmest March during that period. Temperatures ranged from a high of 79.4 degrees on the 28th down to a low of 20.0 degrees on the 8th.
For Denver, as recorded at Denver International Airport, the month saw an average temperature of 45.8 degrees. This too was well above the Mile High City’s long-term March average of 41.6 degrees. The airport saw a maximum temperature of 77 degrees on the 28th and its coldest reading of 17 degrees on the 5th.
In terms of precipitation, Thornton ended the month with 1.56 inches in the bucket. As noted, the vast majority of that fell in the final days of the month. This allowed the month to come in with a total above the 1.31-inch average for March.
Out at the airport, Denver recorded 1.26 inches of precipitation. This was a good bit above the city’s 0.86 inches average for March.
March normally is one of our snowiest months but that was certainly not the case in 2025. Thornton saw a mere 0.80 inches of the white stuff. This was far below the 10.7 inch average for March over the past 18 years. It was our third least-snowiest March during the period.
Denver fared slightly better than us with 2.0 inches of snow recorded. This was far below the Mile High City’s long-term average for March of 11.4 inches.
Click here to view Thornton’s complete March 2025 climate summary report.
