Weather on November 21
Boise, ID
55 Years of Data
Avg High
46°F
Avg Low
29°F
Warmest
1974
55°F avg
Coldest
1985
11°F avg
About This Date
November 21st in Boise, ID typically brings chilly fall weather, with average highs around 46°F and lows near 29°F. Over 55 years of records, the warmest November 21st was in 1974 (55°F average), while the coldest was 1985 (11°F) — a 44°F range across recorded history. Precipitation has occurred on 38% of recorded November 21st dates, with snow falling 15% of the time (heaviest snowfall: 3.4"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for November 21st in Boise, ID? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 51° | 36° | 43° | — | — |
| 2024 | 54° | 45° | 49° | 0.69" | — |
| 2023 | 48° | 31° | 40° | — | — |
| 2022 | 38° | 18° | 28° | — | — |
| 2021 | 47° | 29° | 38° | — | — |
| 2020 | 42° | 24° | 33° | — | — |
| 2019 | 48° | 25° | 37° | — | — |
| 2018 | 43° | 24° | 34° | — | — |
| 2017 | 57° | 42° | 50° | 0.13" | — |
| 2016 | 50° | 30° | 40° | — | — |
| 2015 | 41° | 25° | 33° | — | — |
| 2014 | 41° | 23° | 32° | 0.2" | — |
| 2013 | 40° | 24° | 32° | — | — |
| 2012 | 59° | 32° | 46° | 0.08" | — |
| 2011 | 46° | 28° | 37° | — | — |
| 2010 | 33° | 30° | 32° | 0.3" | 1" |
| 2009 | 46° | 30° | 38° | — | — |
| 2008 | 48° | 31° | 39° | — | — |
| 2007 | 38° | 22° | 30° | — | — |
| 2006 | 67° | 42° | 54° | 0.15" | — |
| 2005 | 48° | 27° | 37° | — | — |
| 2004 | 40° | 20° | 30° | — | — |
| 2003 | 39° | 23° | 31° | — | — |
| 2002 | 59° | 39° | 49° | — | — |
| 2001 | 54° | 42° | 48° | 0.66" | — |
| 2000 | 38° | 19° | 28° | — | — |
| 1999 | 41° | 28° | 35° | 0.23" | 0.9" |
| 1998 | 58° | 41° | 49° | 0.1" | — |
| 1997 | 46° | 31° | 38° | 0.1" | — |
| 1996 | 48° | 36° | 42° | — | — |
| 1995 | 51° | 36° | 43° | — | — |
| 1994 | 29° | 7° | 18° | — | — |
| 1993 | 54° | 14° | 34° | — | — |
| 1992 | 40° | 25° | 32° | 0.38" | 0.3" |
| 1991 | 43° | 27° | 35° | 0.13" | 0.2" |
| 1990 | 44° | 32° | 38° | 0.28" | 0.1" |
| 1989 | 47° | 28° | 37° | — | — |
| 1988 | 46° | 33° | 40° | 0.46" | — |
| 1987 | 50° | 28° | 39° | — | — |
| 1986 | 50° | 28° | 39° | 0.36" | — |
| 1985coldest | 24° | -2° | 11° | — | — |
| 1984 | 42° | 36° | 39° | 0.18" | — |
| 1983 | 45° | 22° | 33° | — | — |
| 1982 | 38° | 24° | 31° | 0.23" | 1.4" |
| 1981 | 56° | 44° | 50° | 0.81" | — |
| 1980 | 49° | 24° | 36° | 0.48" | — |
| 1979 | 41° | 20° | 30° | — | — |
| 1978 | 47° | 29° | 38° | — | — |
| 1977 | 33° | 23° | 28° | 0.81" | 3.4" |
| 1976 | 48° | 30° | 39° | — | — |
| 1975 | 42° | 19° | 31° | — | — |
| 1974warmest | 65° | 46° | 55° | — | — |
| 1973 | 37° | 32° | 35° | 0.3" | 1.7" |
| 1972 | 46° | 28° | 37° | — | — |
| 1971 | 46° | 39° | 43° | — | — |
55 years of data from BOISE AIR TERMINAL