Weather on June 18
Boise, ID
55 Years of Data
Avg High
81°F
Avg Low
53°F
Warmest
1974
86°F avg
Coldest
1973
51°F avg
About This Date
June 18th in Boise, ID typically brings warm summer weather, with average highs around 81°F and lows near 53°F — a 28°F daily swing. Over 55 years of records, the warmest June 18th was in 1974 (86°F average), while the coldest was 1973 (51°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 20% of June 18th dates historically, with the wettest June 18th recording 0.64" 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 June 18th in Boise, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 59° | 76° | — | — |
| 2024 | 73° | 42° | 58° | — | — |
| 2023 | 74° | 53° | 63° | 0.13" | — |
| 2022 | 75° | 51° | 63° | — | — |
| 2021 | 97° | 58° | 77° | — | — |
| 2020 | 75° | 48° | 62° | — | — |
| 2019 | 87° | 58° | 72° | — | — |
| 2018 | 74° | 55° | 64° | 0.03" | — |
| 2017 | 85° | 55° | 70° | — | — |
| 2016 | 82° | 55° | 69° | — | — |
| 2015 | 94° | 60° | 77° | — | — |
| 2014 | 65° | 48° | 56° | 0.23" | — |
| 2013 | 88° | 57° | 72° | — | — |
| 2012 | 75° | 54° | 64° | — | — |
| 2011 | 69° | 56° | 62° | 0.36" | — |
| 2010 | 82° | 46° | 64° | — | — |
| 2009 | 78° | 54° | 66° | — | — |
| 2008 | 84° | 54° | 69° | — | — |
| 2007 | 81° | 50° | 65° | — | — |
| 2006 | 87° | 52° | 69° | — | — |
| 2005 | 70° | 51° | 60° | 0.25" | — |
| 2004 | 87° | 54° | 70° | — | — |
| 2003 | 101° | 69° | 85° | — | — |
| 2002 | 72° | 53° | 62° | 0.38" | — |
| 2001 | 75° | 44° | 60° | — | — |
| 2000 | 90° | 56° | 73° | — | — |
| 1999 | 93° | 66° | 80° | — | — |
| 1998 | 83° | 59° | 71° | — | — |
| 1997 | 80° | 57° | 69° | — | — |
| 1996 | 64° | 38° | 51° | — | — |
| 1995 | 66° | 50° | 58° | 0.64" | — |
| 1994 | 81° | 49° | 65° | — | — |
| 1993 | 84° | 52° | 68° | — | — |
| 1992 | 86° | 58° | 72° | 0.33" | — |
| 1991 | 90° | 44° | 67° | — | — |
| 1990 | 80° | 53° | 67° | — | — |
| 1989 | 89° | 51° | 70° | — | — |
| 1988 | 93° | 57° | 75° | — | — |
| 1987 | 71° | 50° | 61° | — | — |
| 1986 | 82° | 58° | 70° | — | — |
| 1985 | 95° | 55° | 75° | — | — |
| 1984 | 82° | 49° | 65° | — | — |
| 1983 | 68° | 47° | 57° | — | — |
| 1982 | 88° | 58° | 73° | — | — |
| 1981 | 78° | 47° | 62° | — | — |
| 1980 | 86° | 54° | 70° | — | — |
| 1979 | 61° | 46° | 53° | 0.23" | — |
| 1978 | 71° | 49° | 60° | 0.08" | — |
| 1977 | 88° | 57° | 72° | — | — |
| 1976 | 83° | 49° | 66° | — | — |
| 1975 | 60° | 48° | 54° | 0.05" | — |
| 1974warmest | 103° | 70° | 86° | — | — |
| 1973coldest | 66° | 36° | 51° | — | — |
| 1972 | 73° | 49° | 61° | — | — |
| 1971 | 75° | 50° | 63° | — | — |
55 years of data from BOISE AIR TERMINAL