Weather on February 21
Boise, ID
55 Years of Data
Avg High
47°F
Avg Low
29°F
Warmest
2000
50°F avg
Coldest
1984
26°F avg
About This Date
February 21st in Boise, ID typically brings chilly winter weather, with average highs around 47°F and lows near 29°F. Over 56 years of records, the warmest February 21st was in 2000 (50°F average), while the coldest was 1984 (26°F) — a 24°F range across recorded history. Precipitation has occurred on 32% of recorded February 21st dates, with snow falling 16% of the time (heaviest snowfall: 1.9"). 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 Boise, ID? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 49° | 31° | 40° | — | — |
| 2025 | 47° | 26° | 37° | — | — |
| 2024 | 53° | 34° | 43° | — | — |
| 2023 | 51° | 27° | 39° | — | — |
| 2022 | 40° | 24° | 32° | — | — |
| 2021 | 44° | 24° | 34° | — | — |
| 2020 | 45° | 23° | 34° | — | — |
| 2019 | 33° | 20° | 27° | 0.18" | 1.2" |
| 2018 | 37° | 22° | 30° | — | — |
| 2017 | 56° | 39° | 47° | — | — |
| 2016 | 52° | 33° | 42° | — | — |
| 2015 | 49° | 27° | 38° | — | — |
| 2014 | 50° | 31° | 41° | — | — |
| 2013 | 43° | 20° | 31° | — | — |
| 2012 | 47° | 34° | 40° | 0.64" | — |
| 2011 | 41° | 25° | 33° | — | — |
| 2010 | 40° | 26° | 33° | — | — |
| 2009 | 52° | 29° | 40° | — | — |
| 2008 | 46° | 29° | 37° | — | — |
| 2007 | 40° | 32° | 36° | 0.13" | 0.7" |
| 2006 | 37° | 23° | 30° | — | — |
| 2005 | 42° | 31° | 36° | — | — |
| 2004 | 43° | 24° | 33° | — | — |
| 2003 | 53° | 42° | 48° | — | — |
| 2002 | 51° | 33° | 42° | — | — |
| 2001 | 49° | 37° | 43° | 0.23" | — |
| 2000warmest | 61° | 40° | 50° | — | — |
| 1999 | 45° | 32° | 38° | 0.28" | 0.4" |
| 1998 | 51° | 36° | 43° | 0.74" | — |
| 1997 | 45° | 23° | 34° | — | — |
| 1996 | 58° | 34° | 46° | — | — |
| 1995 | 60° | 35° | 48° | — | — |
| 1994 | 43° | 28° | 35° | 0.1" | 0.3" |
| 1993 | 37° | 24° | 31° | 0.28" | 1.9" |
| 1992 | 48° | 37° | 43° | 0.18" | — |
| 1991 | 63° | 35° | 49° | — | — |
| 1990 | 45° | 27° | 36° | 0.1" | 0.4" |
| 1989 | 44° | 26° | 35° | — | — |
| 1988 | 60° | 30° | 45° | — | — |
| 1987 | 45° | 25° | 35° | — | — |
| 1986 | 48° | 34° | 41° | 0.25" | — |
| 1985 | 40° | 20° | 30° | — | — |
| 1984coldest | 34° | 18° | 26° | 0.38" | 1.5" |
| 1983 | 55° | 40° | 47° | 0.05" | — |
| 1982 | 58° | 37° | 47° | 0.2" | — |
| 1981 | 49° | 25° | 37° | — | — |
| 1980 | 42° | 34° | 38° | 0.15" | 0.4" |
| 1979 | 46° | 31° | 38° | 0.05" | — |
| 1978 | 48° | 32° | 40° | — | — |
| 1977 | 50° | 32° | 41° | 0.28" | — |
| 1976 | 44° | 26° | 35° | — | — |
| 1975 | 35° | 21° | 28° | — | — |
| 1974 | 49° | 34° | 41° | 0.15" | 0.4" |
| 1973 | 47° | 28° | 37° | — | — |
| 1972 | 55° | 32° | 44° | — | — |
| 1971 | 47° | 29° | 38° | — | — |
56 years of data from BOISE AIR TERMINAL