Weather on February 21
Boulder, CO
55 Years of Data
Avg High
49°F
Avg Low
24°F
Warmest
1982
60°F avg
Coldest
2018
12°F avg
About This Date
February 21st in Boulder, CO typically brings chilly winter weather, with average highs around 49°F and lows near 24°F — a 25°F daily swing. Over 56 years of records, the warmest February 21st was in 1982 (60°F average), while the coldest was 2018 (12°F) — a 48°F range across recorded history. Precipitation has occurred on 16% of recorded February 21st dates, with snow falling 13% of the time (heaviest snowfall: 6.4"). The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
Planning for February 21st in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 46° | 18° | 32° | — | — |
| 2025 | 43° | 21° | 32° | — | — |
| 2024 | 61° | 36° | 48° | — | — |
| 2023 | 63° | 32° | 47° | — | — |
| 2022 | 55° | 7° | 31° | — | — |
| 2021 | 43° | 27° | 35° | — | — |
| 2020 | 46° | 14° | 30° | — | — |
| 2019 | 34° | 14° | 24° | — | — |
| 2018coldest | 23° | 0° | 12° | — | — |
| 2017 | 70° | 33° | 51° | — | — |
| 2016 | 54° | 28° | 41° | — | — |
| 2015 | 43° | 22° | 32° | 1.12" | 6.4" |
| 2014 | 47° | 29° | 38° | — | — |
| 2013 | 30° | 14° | 22° | 0.99" | 4.3" |
| 2012 | 48° | 27° | 37° | — | — |
| 2011 | 47° | 16° | 31° | — | — |
| 2010 | 25° | 16° | 20° | 0.66" | 6" |
| 2009 | 49° | 11° | 30° | 0.05" | 0.8" |
| 2008 | 49° | 24° | 36° | — | — |
| 2007 | 62° | 35° | 49° | — | — |
| 2006 | 42° | 20° | 31° | — | — |
| 2005 | 57° | 35° | 46° | — | — |
| 2004 | 48° | 23° | 36° | — | — |
| 2003 | 49° | 28° | 38° | — | — |
| 2002 | 48° | 24° | 36° | — | — |
| 2001 | 52° | 29° | 40° | 0.03" | — |
| 2000 | 65° | 33° | 49° | — | — |
| 1999 | 45° | 18° | 31° | — | — |
| 1998 | 55° | 23° | 39° | — | — |
| 1997 | 38° | 19° | 28° | 0.03" | — |
| 1996 | 62° | 37° | 50° | — | — |
| 1995 | 69° | 34° | 51° | — | — |
| 1994 | 40° | 21° | 30° | 0.3" | 1.2" |
| 1993 | 52° | 32° | 42° | — | — |
| 1992 | 60° | 37° | 49° | — | — |
| 1991 | 61° | 37° | 49° | — | — |
| 1990 | 33° | 13° | 23° | — | — |
| 1989 | 45° | 20° | 32° | — | — |
| 1988 | 65° | 41° | 53° | — | — |
| 1987 | 41° | 12° | 27° | — | — |
| 1986 | 51° | 19° | 35° | — | — |
| 1985 | 44° | 32° | 38° | — | — |
| 1984 | 65° | 25° | 45° | — | — |
| 1983 | 52° | 21° | 36° | — | — |
| 1982warmest | 77° | 42° | 60° | — | — |
| 1981 | 47° | 24° | 35° | 0.13" | 1.5" |
| 1980 | 58° | 32° | 45° | — | — |
| 1979 | 45° | 23° | 34° | — | — |
| 1978 | 50° | 20° | 35° | — | — |
| 1977 | 68° | 39° | 54° | — | — |
| 1976 | 35° | 12° | 24° | — | — |
| 1975 | 38° | 20° | 29° | — | — |
| 1974 | 36° | 12° | 24° | — | — |
| 1973 | 47° | 19° | 33° | — | — |
| 1972 | 62° | 34° | 48° | — | — |
| 1971 | 27° | 13° | 20° | 0.56" | 4" |
56 years of data from BOULDER MUNI AP