Weather on August 11
Boise, ID
55 Years of Data
Avg High
92°F
Avg Low
61°F
Warmest
2018
88°F avg
Coldest
1985
59°F avg
About This Date
August 11th in Boise, ID typically brings hot summer weather, with average highs around 92°F and lows near 61°F — a 31°F daily swing. Over 55 years of records, the warmest August 11th was in 2018 (88°F average), while the coldest was 1985 (59°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 5% of August 11th dates historically, with the wettest August 11th recording 0.66" 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 August 11th in Boise, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 62° | 79° | — | — |
| 2024 | 97° | 65° | 81° | — | — |
| 2023 | 96° | 62° | 79° | — | — |
| 2022 | 100° | 71° | 86° | — | — |
| 2021 | 98° | 62° | 80° | — | — |
| 2020 | 97° | 62° | 79° | — | — |
| 2019 | 78° | 58° | 68° | — | — |
| 2018warmest | 104° | 71° | 88° | — | — |
| 2017 | 97° | 68° | 82° | — | — |
| 2016 | 87° | 57° | 72° | — | — |
| 2015 | 102° | 66° | 84° | — | — |
| 2014 | 102° | 72° | 87° | — | — |
| 2013 | 90° | 68° | 79° | — | — |
| 2012 | 94° | 60° | 77° | — | — |
| 2011 | 87° | 58° | 72° | — | — |
| 2010 | 71° | 55° | 63° | 0.3" | — |
| 2009 | 97° | 66° | 81° | — | — |
| 2008 | 84° | 55° | 70° | — | — |
| 2007 | 95° | 56° | 75° | — | — |
| 2006 | 87° | 56° | 71° | — | — |
| 2005 | 91° | 57° | 74° | — | — |
| 2004 | 97° | 63° | 80° | — | — |
| 2003 | 95° | 65° | 80° | — | — |
| 2002 | 90° | 59° | 74° | — | — |
| 2001 | 97° | 68° | 82° | — | — |
| 2000 | 87° | 62° | 75° | — | — |
| 1999 | 74° | 59° | 66° | 0.66" | — |
| 1998 | 97° | 64° | 80° | — | — |
| 1997 | 80° | 59° | 70° | 0.13" | — |
| 1996 | 102° | 72° | 87° | — | — |
| 1995 | 79° | 50° | 64° | — | — |
| 1994 | 96° | 68° | 82° | — | — |
| 1993 | 86° | 56° | 71° | — | — |
| 1992 | 98° | 57° | 78° | — | — |
| 1991 | 91° | 48° | 70° | — | — |
| 1990 | 94° | 60° | 77° | — | — |
| 1989 | 95° | 62° | 79° | — | — |
| 1988 | 98° | 64° | 81° | — | — |
| 1987 | 84° | 53° | 69° | — | — |
| 1986 | 92° | 69° | 80° | — | — |
| 1985coldest | 74° | 45° | 59° | — | — |
| 1984 | 96° | 75° | 86° | — | — |
| 1983 | 86° | 60° | 73° | — | — |
| 1982 | 81° | 51° | 66° | — | — |
| 1981 | 96° | 62° | 79° | — | — |
| 1980 | 96° | 64° | 80° | — | — |
| 1979 | 94° | 65° | 79° | — | — |
| 1978 | 95° | 52° | 73° | — | — |
| 1977 | 94° | 60° | 77° | — | — |
| 1976 | 90° | 57° | 73° | — | — |
| 1975 | 91° | 52° | 71° | — | — |
| 1974 | 89° | 52° | 70° | — | — |
| 1973 | 92° | 55° | 73° | — | — |
| 1972 | 102° | 65° | 83° | — | — |
| 1971 | 97° | 60° | 78° | — | — |
55 years of data from BOISE AIR TERMINAL