Weather on April 18
Boise, ID
55 Years of Data
Avg High
62°F
Avg Low
39°F
Warmest
1994
70°F avg
Coldest
1972
38°F avg
About This Date
April 18th in Boise, ID typically brings mild spring weather, with average highs around 62°F and lows near 39°F. Over 55 years of records, the warmest April 18th was in 1994 (70°F average), while the coldest was 1972 (38°F) — a 32°F range across recorded history. Precipitation has occurred on 31% of recorded April 18th dates, with snow falling 2% of the time. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for April 18th in Boise, ID? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 35° | 48° | — | — |
| 2024 | 58° | 31° | 45° | — | — |
| 2023 | 47° | 30° | 39° | 0.41" | 0.9" |
| 2022 | 72° | 40° | 56° | — | — |
| 2021 | 75° | 40° | 57° | — | — |
| 2020 | 69° | 35° | 52° | — | — |
| 2019 | 73° | 42° | 58° | — | — |
| 2018 | 63° | 36° | 49° | — | — |
| 2017 | 61° | 44° | 52° | 1.3" | — |
| 2016 | 73° | 46° | 60° | — | — |
| 2015 | 73° | 42° | 58° | — | — |
| 2014 | 62° | 46° | 54° | 0.03" | — |
| 2013 | 57° | 25° | 41° | — | — |
| 2012 | 63° | 46° | 54° | 0.13" | — |
| 2011 | 55° | 37° | 46° | 0.33" | — |
| 2010 | 74° | 43° | 58° | — | — |
| 2009 | 65° | 40° | 52° | — | — |
| 2008 | 67° | 40° | 53° | — | — |
| 2007 | 47° | 38° | 42° | 0.03" | — |
| 2006 | 54° | 29° | 41° | — | — |
| 2005 | 55° | 33° | 44° | 0.05" | — |
| 2004 | 60° | 36° | 48° | — | — |
| 2003 | 56° | 35° | 45° | — | — |
| 2002 | 48° | 32° | 40° | — | — |
| 2001 | 71° | 41° | 56° | — | — |
| 2000 | 66° | 48° | 57° | 0.41" | — |
| 1999 | 77° | 47° | 62° | — | — |
| 1998 | 60° | 35° | 48° | — | — |
| 1997 | 70° | 52° | 61° | 0.18" | — |
| 1996 | 51° | 35° | 43° | 0.46" | — |
| 1995 | 57° | 40° | 48° | — | — |
| 1994warmest | 89° | 51° | 70° | — | — |
| 1993 | 53° | 39° | 46° | 0.1" | — |
| 1992 | 59° | 41° | 50° | — | — |
| 1991 | 58° | 39° | 48° | — | — |
| 1990 | 70° | 49° | 59° | — | — |
| 1989 | 83° | 51° | 67° | — | — |
| 1988 | 65° | 36° | 50° | — | — |
| 1987 | 52° | 37° | 44° | 0.08" | — |
| 1986 | 56° | 30° | 43° | — | — |
| 1985 | 63° | 36° | 49° | 0.43" | — |
| 1984 | 54° | 42° | 48° | — | — |
| 1983 | 68° | 47° | 57° | — | — |
| 1982 | 48° | 31° | 39° | — | — |
| 1981 | 73° | 43° | 58° | 0.05" | — |
| 1980 | 78° | 44° | 61° | — | — |
| 1979 | 50° | 33° | 42° | 0.2" | — |
| 1978 | 65° | 37° | 51° | — | — |
| 1977 | 57° | 23° | 40° | — | — |
| 1976 | 53° | 35° | 44° | 0.05" | — |
| 1975 | 59° | 35° | 47° | — | — |
| 1974 | 69° | 49° | 59° | — | — |
| 1973 | 49° | 31° | 40° | — | — |
| 1972coldest | 49° | 27° | 38° | — | — |
| 1971 | 59° | 40° | 49° | 0.03" | — |
55 years of data from BOISE AIR TERMINAL