Historical Weather Records & Monthly Climate for Thornton, CO
All-Time High
104°F
All-Time Low
-39°F
Max Daily Snow
14.4"
Max Wind Gust
62 mph
Monthly Climate Averages
Based on 30 years of historical data (1994 - 2023)
| Month | High (°F) | Low (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|
| January | 40° | 16° | 0.84" | 5.77" |
| February | 42° | 16° | 0.91" | 6.12" |
| March | 51° | 24° | 1.78" | 9.23" |
| April | 59° | 32° | 2.62" | 8.7" |
| May | 68° | 42° | 3.44" | 1.93" |
| June | 80° | 52° | 1.96" | 0 |
| July | 86° | 59° | 1.5" | 0 |
| August | 84° | 58° | 1.44" | 0 |
| September | 77° | 50° | 1.37" | 0.64" |
| October | 63° | 37° | 1.47" | 3.67" |
| November | 50° | 25° | 0.94" | 5.09" |
| December | 40° | 16° | 0.83" | 5.68" |
Historical Weather Extremes
Based on 80+ years of archive data (1940 - 2024)
🔥
Longest Heatwave
18 Days
2008
Consecutive days ≥ 90°F
🧊
Deepest Freeze
22 Days
1942
Consecutive days ≤ 32°F
🏜️
Longest Drought
36 Days
1965
Consecutive days w/o rain
☔
Wettest Month
7.55"
May 1957
Most rainfall in one month
⛄
Snowiest Month
22.87"
March 2003
Most snowfall in one month
More Historical Climate Data for Cities in
CO