Weather on July 31
Boise, ID
55 Years of Data
Avg High
94°F
Avg Low
62°F
Warmest
2022
90°F avg
Coldest
1975
61°F avg
About This Date
July 31st in Boise, ID typically brings hot summer weather, with average highs around 94°F and lows near 62°F — a 32°F daily swing. Over 55 years of records, the warmest July 31st was in 2022 (90°F average), while the coldest was 1975 (61°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 11% of July 31st dates historically, with the wettest July 31st recording 2.11" of rain. The last decade has been 6.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.3°F warmer on this date compared to 20-30 years ago.
Planning for July 31st in Boise, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 71° | 83° | — | — |
| 2024 | 96° | 64° | 80° | — | — |
| 2023 | 96° | 62° | 79° | — | — |
| 2022warmest | 106° | 74° | 90° | — | — |
| 2021 | 96° | 69° | 83° | 2.11" | — |
| 2020 | 104° | 71° | 88° | — | — |
| 2019 | 98° | 64° | 81° | — | — |
| 2018 | 98° | 76° | 87° | — | — |
| 2017 | 100° | 64° | 82° | — | — |
| 2016 | 92° | 62° | 77° | — | — |
| 2015 | 99° | 64° | 81° | — | — |
| 2014 | 97° | 68° | 82° | — | — |
| 2013 | 95° | 65° | 80° | — | — |
| 2012 | 98° | 61° | 79° | — | — |
| 2011 | 100° | 72° | 86° | 0.03" | — |
| 2010 | 95° | 68° | 82° | — | — |
| 2009 | 97° | 66° | 81° | — | — |
| 2008 | 98° | 62° | 80° | — | — |
| 2007 | 98° | 64° | 81° | — | — |
| 2006 | 84° | 54° | 69° | — | — |
| 2005 | 100° | 68° | 84° | — | — |
| 2004 | 99° | 64° | 81° | — | — |
| 2003 | 101° | 67° | 84° | — | — |
| 2002 | 84° | 61° | 72° | — | — |
| 2001 | 77° | 49° | 63° | — | — |
| 2000 | 101° | 71° | 86° | — | — |
| 1999 | 93° | 56° | 74° | — | — |
| 1998 | 86° | 60° | 73° | 0.2" | — |
| 1997 | 91° | 58° | 74° | 0.1" | — |
| 1996 | 94° | 59° | 76° | — | — |
| 1995 | 90° | 48° | 69° | — | — |
| 1994 | 100° | 67° | 83° | — | — |
| 1993 | 85° | 49° | 67° | — | — |
| 1992 | 106° | 62° | 84° | — | — |
| 1991 | 102° | 60° | 81° | — | — |
| 1990 | 92° | 60° | 76° | — | — |
| 1989 | 98° | 60° | 79° | — | — |
| 1988 | 95° | 61° | 78° | — | — |
| 1987 | 80° | 59° | 70° | — | — |
| 1986 | 89° | 49° | 69° | — | — |
| 1985 | 89° | 56° | 72° | 0.05" | — |
| 1984 | 88° | 58° | 73° | — | — |
| 1983 | 90° | 70° | 80° | — | — |
| 1982 | 95° | 59° | 77° | — | — |
| 1981 | 91° | 49° | 70° | — | — |
| 1980 | 93° | 62° | 78° | — | — |
| 1979 | 95° | 57° | 76° | — | — |
| 1978 | 95° | 56° | 75° | — | — |
| 1977 | 93° | 57° | 75° | — | — |
| 1976 | 92° | 64° | 78° | 1.98" | — |
| 1975coldest | 77° | 44° | 61° | — | — |
| 1974 | 97° | 61° | 79° | — | — |
| 1973 | 99° | 63° | 81° | — | — |
| 1972 | 97° | 68° | 82° | — | — |
| 1971 | 100° | 65° | 82° | — | — |
55 years of data from BOISE AIR TERMINAL