Weather on October 18
Boise, ID
55 Years of Data
Avg High
65°F
Avg Low
39°F
Warmest
2003
66°F avg
Coldest
1984
33°F avg
About This Date
October 18th in Boise, ID typically brings mild fall weather, with average highs around 65°F and lows near 39°F — a 26°F daily swing. Over 55 years of records, the warmest October 18th was in 2003 (66°F average), while the coldest was 1984 (33°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 16% of October 18th dates historically, with the wettest October 18th recording 1.4" of rain. 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 October 18th in Boise, ID? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 36° | 49° | — | — |
| 2024 | 56° | 34° | 45° | — | — |
| 2023 | 75° | 48° | 62° | — | — |
| 2022 | 77° | 46° | 62° | — | — |
| 2021 | 63° | 47° | 55° | — | — |
| 2020 | 71° | 44° | 58° | — | — |
| 2019 | 60° | 38° | 49° | 0.03" | — |
| 2018 | 67° | 42° | 54° | — | — |
| 2017 | 76° | 38° | 57° | — | — |
| 2016 | 53° | 44° | 49° | 0.97" | — |
| 2015 | 66° | 54° | 60° | 0.23" | — |
| 2014 | 71° | 42° | 57° | — | — |
| 2013 | 62° | 32° | 47° | — | — |
| 2012 | 65° | 37° | 51° | — | — |
| 2011 | 67° | 41° | 54° | — | — |
| 2010 | 67° | 38° | 52° | — | — |
| 2009 | 71° | 49° | 60° | 0.23" | — |
| 2008 | 74° | 47° | 60° | — | — |
| 2007 | 51° | 35° | 43° | 0.03" | — |
| 2006 | 57° | 34° | 45° | — | — |
| 2005 | 73° | 44° | 59° | — | — |
| 2004 | 54° | 44° | 49° | — | — |
| 2003warmest | 82° | 50° | 66° | — | — |
| 2002 | 69° | 40° | 54° | — | — |
| 2001 | 60° | 32° | 46° | — | — |
| 2000 | 69° | 46° | 58° | — | — |
| 1999 | 64° | 33° | 49° | — | — |
| 1998 | 63° | 35° | 49° | — | — |
| 1997 | 68° | 42° | 55° | — | — |
| 1996 | 65° | 43° | 54° | 0.05" | — |
| 1995 | 60° | 34° | 47° | 0.1" | — |
| 1994 | 63° | 37° | 50° | — | — |
| 1993 | 58° | 31° | 44° | — | — |
| 1992 | 69° | 42° | 56° | — | — |
| 1991 | 61° | 27° | 44° | — | — |
| 1990 | 58° | 43° | 50° | 0.38" | — |
| 1989 | 73° | 41° | 57° | — | — |
| 1988 | 75° | 43° | 59° | — | — |
| 1987 | 63° | 31° | 47° | — | — |
| 1986 | 60° | 39° | 50° | — | — |
| 1985 | 71° | 40° | 55° | — | — |
| 1984coldest | 45° | 22° | 33° | — | — |
| 1983 | 60° | 37° | 49° | — | — |
| 1982 | 52° | 29° | 40° | — | — |
| 1981 | 69° | 38° | 53° | — | — |
| 1980 | 63° | 33° | 48° | — | — |
| 1979 | 55° | 44° | 50° | 1.4" | — |
| 1978 | 73° | 40° | 56° | — | — |
| 1977 | 76° | 47° | 61° | — | — |
| 1976 | 56° | 27° | 41° | — | — |
| 1975 | 66° | 44° | 55° | — | — |
| 1974 | 75° | 41° | 58° | — | — |
| 1973 | 77° | 46° | 62° | — | — |
| 1972 | 67° | 43° | 55° | — | — |
| 1971 | 52° | 27° | 39° | — | — |
55 years of data from BOISE AIR TERMINAL