Weather on October 15
Boise, ID
55 Years of Data
Avg High
66°F
Avg Low
41°F
Warmest
1991
69°F avg
Coldest
1971
37°F avg
About This Date
October 15th in Boise, ID typically brings mild fall weather, with average highs around 66°F and lows near 41°F — a 25°F daily swing. Over 55 years of records, the warmest October 15th was in 1991 (69°F average), while the coldest was 1971 (37°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 15th dates historically, with the wettest October 15th recording 0.84" of rain. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for October 15th in Boise, ID? Great weather for outdoor activities.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 40° | 50° | — | — |
| 2024 | 81° | 48° | 64° | — | — |
| 2023 | 81° | 53° | 67° | — | — |
| 2022 | 78° | 48° | 63° | — | — |
| 2021 | 65° | 40° | 52° | — | — |
| 2020 | 59° | 36° | 47° | — | — |
| 2019 | 74° | 40° | 57° | — | — |
| 2018 | 57° | 32° | 45° | — | — |
| 2017 | 61° | 34° | 47° | — | — |
| 2016 | 68° | 51° | 60° | 0.18" | — |
| 2015 | 81° | 50° | 65° | — | — |
| 2014 | 71° | 47° | 59° | — | — |
| 2013 | 59° | 36° | 47° | — | — |
| 2012 | 74° | 55° | 64° | 0.3" | — |
| 2011 | 73° | 50° | 62° | — | — |
| 2010 | 71° | 52° | 61° | — | — |
| 2009 | 66° | 50° | 58° | 0.08" | — |
| 2008 | 61° | 41° | 51° | — | — |
| 2007 | 76° | 44° | 60° | — | — |
| 2006 | 63° | 46° | 54° | 0.84" | — |
| 2005 | 75° | 48° | 62° | — | — |
| 2004 | 74° | 45° | 59° | — | — |
| 2003 | 63° | 36° | 49° | — | — |
| 2002 | 65° | 40° | 52° | — | — |
| 2001 | 68° | 41° | 55° | — | — |
| 2000 | 66° | 46° | 56° | — | — |
| 1999 | 53° | 34° | 43° | — | — |
| 1998 | 55° | 36° | 45° | — | — |
| 1997 | 73° | 42° | 58° | — | — |
| 1996 | 58° | 37° | 47° | — | — |
| 1995 | 71° | 38° | 54° | — | — |
| 1994 | 54° | 29° | 41° | — | — |
| 1993 | 63° | 44° | 53° | 0.15" | — |
| 1992 | 55° | 21° | 38° | — | — |
| 1991warmest | 87° | 50° | 69° | — | — |
| 1990 | 67° | 45° | 56° | — | — |
| 1989 | 56° | 33° | 44° | — | — |
| 1988 | 73° | 49° | 61° | — | — |
| 1987 | 60° | 33° | 47° | — | — |
| 1986 | 68° | 41° | 55° | — | — |
| 1985 | 69° | 35° | 52° | — | — |
| 1984 | 49° | 25° | 37° | — | — |
| 1983 | 58° | 33° | 45° | — | — |
| 1982 | 75° | 47° | 61° | — | — |
| 1981 | 57° | 34° | 45° | — | — |
| 1980 | 53° | 35° | 44° | — | — |
| 1979 | 62° | 44° | 53° | 0.41" | — |
| 1978 | 75° | 42° | 59° | — | — |
| 1977 | 77° | 48° | 63° | — | — |
| 1976 | 69° | 36° | 52° | — | — |
| 1975 | 62° | 40° | 51° | — | — |
| 1974 | 69° | 39° | 54° | — | — |
| 1973 | 78° | 49° | 63° | — | — |
| 1972 | 62° | 47° | 54° | 0.18" | — |
| 1971coldest | 50° | 25° | 37° | — | — |
55 years of data from BOISE AIR TERMINAL