Weather on March 20
Boise, ID
55 Years of Data
Avg High
58°F
Avg Low
35°F
Warmest
2026
66°F avg
Coldest
1974
34°F avg
About This Date
March 20th in Boise, ID typically brings cool spring weather, with average highs around 58°F and lows near 35°F. Over 56 years of records, the warmest March 20th was in 2026 (66°F average), while the coldest was 1974 (34°F) — a 32°F range across recorded history. Precipitation has occurred on 25% of recorded March 20th dates, with snow falling 5% of the time. 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 March 20th in Boise, ID? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 83° | 49° | 66° | — | — |
| 2025 | 51° | 40° | 45° | 0.05" | — |
| 2024 | 72° | 41° | 56° | — | — |
| 2023 | 48° | 33° | 41° | 0.74" | 0.5" |
| 2022 | 48° | 31° | 40° | — | — |
| 2021 | 54° | 37° | 45° | — | — |
| 2020 | 59° | 40° | 49° | — | — |
| 2019 | 68° | 32° | 50° | — | — |
| 2018 | 52° | 40° | 46° | — | — |
| 2017 | 64° | 48° | 56° | — | — |
| 2016 | 70° | 38° | 54° | 0.25" | — |
| 2015 | 72° | 38° | 55° | — | — |
| 2014 | 49° | 32° | 40° | — | — |
| 2013 | 59° | 40° | 49° | 0.81" | — |
| 2012 | 47° | 33° | 40° | 0.1" | 0.2" |
| 2011 | 57° | 35° | 46° | — | — |
| 2010 | 61° | 35° | 48° | — | — |
| 2009 | 72° | 38° | 55° | — | — |
| 2008 | 50° | 31° | 40° | — | — |
| 2007 | 59° | 42° | 51° | — | — |
| 2006 | 54° | 28° | 41° | 0.03" | — |
| 2005 | 53° | 43° | 48° | 0.15" | — |
| 2004 | 66° | 31° | 48° | — | — |
| 2003 | 57° | 39° | 48° | — | — |
| 2002 | 63° | 40° | 51° | — | — |
| 2001 | 60° | 41° | 51° | — | — |
| 2000 | 50° | 26° | 38° | — | — |
| 1999 | 70° | 43° | 56° | — | — |
| 1998 | 65° | 33° | 49° | — | — |
| 1997 | 58° | 46° | 52° | 0.15" | — |
| 1996 | 63° | 37° | 50° | — | — |
| 1995 | 61° | 42° | 51° | 0.3" | — |
| 1994 | 56° | 23° | 39° | — | — |
| 1993 | 55° | 37° | 46° | 0.13" | — |
| 1992 | 63° | 34° | 48° | — | — |
| 1991 | 55° | 29° | 42° | — | — |
| 1990 | 64° | 34° | 49° | — | — |
| 1989 | 52° | 25° | 38° | — | — |
| 1988 | 70° | 39° | 54° | — | — |
| 1987 | 48° | 22° | 35° | — | — |
| 1986 | 65° | 33° | 49° | — | — |
| 1985 | 58° | 30° | 44° | — | — |
| 1984 | 64° | 39° | 52° | — | — |
| 1983 | 51° | 25° | 38° | — | — |
| 1982 | 45° | 27° | 36° | — | — |
| 1981 | 43° | 38° | 40° | 4.06" | — |
| 1980 | 57° | 34° | 45° | 0.99" | — |
| 1979 | 56° | 35° | 45° | — | — |
| 1978 | 67° | 34° | 50° | — | — |
| 1977 | 49° | 22° | 35° | — | — |
| 1976 | 45° | 24° | 34° | 0.05" | 0.2" |
| 1975 | 46° | 33° | 40° | — | — |
| 1974coldest | 43° | 26° | 34° | — | — |
| 1973 | 57° | 43° | 50° | 0.08" | — |
| 1972 | 59° | 34° | 46° | — | — |
| 1971 | 56° | 27° | 41° | — | — |
56 years of data from BOISE AIR TERMINAL