Weather on September 2
Boise, ID
55 Years of Data
Avg High
85°F
Avg Low
55°F
Warmest
2025
83°F avg
Coldest
2000
56°F avg
About This Date
September 2nd in Boise, ID typically brings warm fall weather, with average highs around 85°F and lows near 55°F — a 30°F daily swing. Over 55 years of records, the warmest September 2nd was in 2025 (83°F average), while the coldest was 2000 (56°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of September 2nd dates historically. The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
Planning for September 2nd in Boise, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 100° | 66° | 83° | — | — |
| 2024 | 98° | 67° | 82° | — | — |
| 2023 | 82° | 65° | 73° | 0.03" | — |
| 2022 | 101° | 63° | 82° | — | — |
| 2021 | 80° | 47° | 63° | — | — |
| 2020 | 95° | 60° | 78° | — | — |
| 2019 | 94° | 62° | 78° | — | — |
| 2018 | 85° | 54° | 69° | — | — |
| 2017 | 97° | 66° | 81° | — | — |
| 2016 | 70° | 55° | 62° | — | — |
| 2015 | 86° | 61° | 73° | — | — |
| 2014 | 89° | 55° | 72° | — | — |
| 2013 | 88° | 65° | 76° | — | — |
| 2012 | 86° | 51° | 69° | — | — |
| 2011 | 81° | 50° | 65° | — | — |
| 2010 | 84° | 51° | 68° | — | — |
| 2009 | 95° | 66° | 81° | — | — |
| 2008 | 75° | 49° | 62° | — | — |
| 2007 | 97° | 64° | 80° | — | — |
| 2006 | 88° | 54° | 71° | — | — |
| 2005 | 94° | 62° | 78° | — | — |
| 2004 | 69° | 50° | 60° | — | — |
| 2003 | 92° | 61° | 76° | — | — |
| 2002 | 88° | 54° | 71° | — | — |
| 2001 | 92° | 56° | 74° | — | — |
| 2000coldest | 65° | 47° | 56° | 0.38" | — |
| 1999 | 74° | 42° | 58° | — | — |
| 1998 | 99° | 66° | 82° | — | — |
| 1997 | 86° | 65° | 75° | 0.03" | — |
| 1996 | 81° | 48° | 64° | — | — |
| 1995 | 93° | 56° | 74° | — | — |
| 1994 | 87° | 53° | 70° | — | — |
| 1993 | 87° | 51° | 69° | — | — |
| 1992 | 88° | 56° | 72° | — | — |
| 1991 | 83° | 49° | 66° | — | — |
| 1990 | 88° | 54° | 71° | — | — |
| 1989 | 71° | 52° | 61° | — | — |
| 1988 | 95° | 56° | 75° | — | — |
| 1987 | 92° | 69° | 80° | — | — |
| 1986 | 81° | 47° | 64° | — | — |
| 1985 | 68° | 49° | 58° | 0.03" | — |
| 1984 | 83° | 49° | 66° | — | — |
| 1983 | 76° | 49° | 62° | — | — |
| 1982 | 90° | 55° | 72° | — | — |
| 1981 | 75° | 45° | 60° | — | — |
| 1980 | 69° | 50° | 60° | — | — |
| 1979 | 88° | 56° | 72° | — | — |
| 1978 | 93° | 64° | 79° | — | — |
| 1977 | 89° | 55° | 72° | — | — |
| 1976 | 87° | 53° | 70° | — | — |
| 1975 | 75° | 43° | 59° | — | — |
| 1974 | 84° | 53° | 69° | — | — |
| 1973 | 76° | 43° | 59° | — | — |
| 1972 | 85° | 54° | 69° | — | — |
| 1971 | 71° | 50° | 61° | — | — |
55 years of data from BOISE AIR TERMINAL