Weather on October 20
Boise, ID
55 Years of Data
Avg High
65°F
Avg Low
40°F
Warmest
2003
70°F avg
Coldest
1990
35°F avg
About This Date
October 20th in Boise, ID typically brings mild fall weather, with average highs around 65°F and lows near 40°F — a 25°F daily swing. Over 55 years of records, the warmest October 20th was in 2003 (70°F average), while the coldest was 1990 (35°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 20th dates historically, with the wettest October 20th recording 0.74" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Boise, ID? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 56° | 35° | 45° | — | — |
| 2024 | 71° | 43° | 57° | — | — |
| 2023 | 80° | 52° | 66° | — | — |
| 2022 | 76° | 46° | 61° | — | — |
| 2021 | 68° | 54° | 61° | — | — |
| 2020 | 62° | 45° | 53° | — | — |
| 2019 | 50° | 35° | 43° | — | — |
| 2018 | 72° | 43° | 57° | — | — |
| 2017 | 63° | 39° | 51° | 0.53" | — |
| 2016 | 66° | 43° | 54° | — | — |
| 2015 | 67° | 46° | 56° | 0.05" | — |
| 2014 | 77° | 47° | 62° | 0.05" | — |
| 2013 | 69° | 34° | 51° | — | — |
| 2012 | 64° | 44° | 54° | 0.08" | — |
| 2011 | 67° | 44° | 55° | — | — |
| 2010 | 73° | 42° | 58° | — | — |
| 2009 | 61° | 40° | 50° | — | — |
| 2008 | 71° | 49° | 60° | — | — |
| 2007 | 52° | 39° | 45° | — | — |
| 2006 | 60° | 36° | 48° | — | — |
| 2005 | 66° | 43° | 54° | — | — |
| 2004 | 58° | 43° | 50° | — | — |
| 2003warmest | 84° | 55° | 70° | — | — |
| 2002 | 67° | 41° | 54° | — | — |
| 2001 | 62° | 39° | 51° | — | — |
| 2000 | 72° | 50° | 61° | 0.74" | — |
| 1999 | 67° | 40° | 53° | — | — |
| 1998 | 63° | 36° | 49° | — | — |
| 1997 | 62° | 35° | 49° | — | — |
| 1996 | 47° | 23° | 35° | — | — |
| 1995 | 62° | 32° | 47° | — | — |
| 1994 | 64° | 36° | 50° | — | — |
| 1993 | 62° | 31° | 46° | — | — |
| 1992 | 79° | 43° | 61° | — | — |
| 1991 | 66° | 33° | 50° | — | — |
| 1990coldest | 51° | 20° | 35° | — | — |
| 1989 | 73° | 43° | 58° | — | — |
| 1988 | 68° | 38° | 53° | — | — |
| 1987 | 67° | 37° | 52° | — | — |
| 1986 | 67° | 43° | 55° | — | — |
| 1985 | 72° | 49° | 60° | — | — |
| 1984 | 47° | 28° | 37° | — | — |
| 1983 | 64° | 40° | 52° | — | — |
| 1982 | 61° | 29° | 45° | — | — |
| 1981 | 65° | 36° | 50° | — | — |
| 1980 | 68° | 37° | 53° | — | — |
| 1979 | 55° | 37° | 46° | — | — |
| 1978 | 73° | 49° | 61° | — | — |
| 1977 | 67° | 37° | 52° | — | — |
| 1976 | 62° | 29° | 45° | — | — |
| 1975 | 70° | 46° | 58° | — | — |
| 1974 | 66° | 43° | 54° | 0.03" | — |
| 1973 | 60° | 50° | 55° | 0.46" | — |
| 1972 | 67° | 45° | 56° | — | — |
| 1971 | 55° | 39° | 47° | — | — |
55 years of data from BOISE AIR TERMINAL