Weather on October 31
Boise, ID
55 Years of Data
Avg High
55°F
Avg Low
35°F
Warmest
2008
62°F avg
Coldest
2002
23°F avg
About This Date
October 31st in Boise, ID typically brings cool fall weather, with average highs around 55°F and lows near 35°F. Over 55 years of records, the warmest October 31st was in 2008 (62°F average), while the coldest was 2002 (23°F) — a 39°F range across recorded history. Precipitation has occurred on 22% of recorded October 31st dates, with snow falling 2% of the time. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Boise, ID? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 33° | 46° | — | — |
| 2024 | 51° | 39° | 45° | 0.1" | — |
| 2023 | 56° | 29° | 43° | — | — |
| 2022 | 69° | 38° | 53° | — | — |
| 2021 | 56° | 40° | 48° | — | — |
| 2020 | 58° | 31° | 45° | — | — |
| 2019 | 43° | 21° | 32° | — | — |
| 2018 | 49° | 37° | 43° | 0.03" | — |
| 2017 | 57° | 29° | 43° | — | — |
| 2016 | 56° | 43° | 49° | 0.03" | — |
| 2015 | 64° | 48° | 56° | — | — |
| 2014 | 65° | 47° | 56° | — | — |
| 2013 | 54° | 34° | 44° | 0.05" | — |
| 2012 | 74° | 49° | 61° | — | — |
| 2011 | 58° | 37° | 47° | 0.08" | — |
| 2010 | 60° | 48° | 54° | 0.28" | — |
| 2009 | 62° | 37° | 50° | — | — |
| 2008warmest | 72° | 52° | 62° | — | — |
| 2007 | 59° | 33° | 46° | — | — |
| 2006 | 43° | 18° | 30° | — | — |
| 2005 | 60° | 40° | 50° | 0.03" | — |
| 2004 | 48° | 31° | 39° | — | — |
| 2003 | 42° | 23° | 33° | — | — |
| 2002coldest | 34° | 13° | 23° | — | — |
| 2001 | 61° | 43° | 52° | — | — |
| 2000 | 52° | 33° | 42° | — | — |
| 1999 | 60° | 33° | 47° | — | — |
| 1998 | 59° | 31° | 45° | — | — |
| 1997 | 60° | 38° | 49° | — | — |
| 1996 | 54° | 34° | 44° | — | — |
| 1995 | 48° | 25° | 36° | — | — |
| 1994 | 57° | 35° | 46° | — | — |
| 1993 | 54° | 33° | 43° | — | — |
| 1992 | 56° | 38° | 47° | 0.66" | — |
| 1991 | 38° | 22° | 30° | — | — |
| 1990 | 62° | 41° | 52° | 0.15" | — |
| 1989 | 52° | 26° | 39° | — | — |
| 1988 | 73° | 39° | 56° | — | — |
| 1987 | 69° | 51° | 60° | — | — |
| 1986 | 55° | 34° | 44° | — | — |
| 1985 | 49° | 27° | 38° | — | — |
| 1984 | 43° | 24° | 33° | — | — |
| 1983 | 67° | 48° | 57° | 0.05" | — |
| 1982 | 52° | 30° | 41° | — | — |
| 1981 | 61° | 37° | 49° | — | — |
| 1980 | 62° | 28° | 45° | — | — |
| 1979 | 48° | 31° | 39° | — | — |
| 1978 | 55° | 21° | 38° | — | — |
| 1977 | 51° | 37° | 44° | — | — |
| 1976 | 55° | 36° | 45° | — | — |
| 1975 | 52° | 32° | 42° | — | — |
| 1974 | 50° | 46° | 48° | — | — |
| 1973 | 59° | 45° | 52° | 0.36" | — |
| 1972 | 47° | 20° | 33° | — | — |
| 1971 | 42° | 30° | 36° | 0.3" | 1" |
55 years of data from BOISE AIR TERMINAL