Weather on February 18
Boise, ID
55 Years of Data
Avg High
46°F
Avg Low
29°F
Warmest
1996
49°F avg
Coldest
2006
17°F avg
About This Date
February 18th in Boise, ID typically brings chilly winter weather, with average highs around 46°F and lows near 29°F. Over 56 years of records, the warmest February 18th was in 1996 (49°F average), while the coldest was 2006 (17°F) — a 32°F range across recorded history. Precipitation has occurred on 43% of recorded February 18th dates, with snow falling 18% of the time (heaviest snowfall: 1.6"). The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for February 18th in Boise, ID? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 37° | 25° | 31° | 0.13" | 1" |
| 2025 | 46° | 31° | 39° | — | — |
| 2024 | 45° | 33° | 39° | 0.46" | 0.2" |
| 2023 | 39° | 23° | 31° | — | — |
| 2022 | 54° | 26° | 40° | — | — |
| 2021 | 37° | 20° | 29° | 0.1" | 1" |
| 2020 | 41° | 23° | 32° | — | — |
| 2019 | 35° | 21° | 28° | — | — |
| 2018 | 47° | 24° | 36° | — | 0.1" |
| 2017 | 50° | 40° | 45° | 0.66" | — |
| 2016 | 56° | 41° | 48° | 0.33" | — |
| 2015 | 56° | 30° | 43° | — | — |
| 2014 | 51° | 36° | 43° | — | — |
| 2013 | 47° | 26° | 36° | — | — |
| 2012 | 47° | 27° | 37° | 0.03" | — |
| 2011 | 44° | 35° | 40° | 0.41" | 1" |
| 2010 | 46° | 33° | 40° | — | — |
| 2009 | 50° | 29° | 39° | — | — |
| 2008 | 40° | 25° | 32° | — | — |
| 2007 | 50° | 32° | 41° | 0.08" | — |
| 2006coldest | 24° | 11° | 17° | — | — |
| 2005 | 42° | 23° | 33° | — | — |
| 2004 | 52° | 38° | 45° | 0.33" | — |
| 2003 | 46° | 32° | 39° | 0.1" | 0.2" |
| 2002 | 51° | 23° | 37° | — | — |
| 2001 | 53° | 33° | 43° | — | — |
| 2000 | 45° | 21° | 33° | — | — |
| 1999 | 42° | 30° | 36° | 0.3" | 0.1" |
| 1998 | 49° | 27° | 38° | — | — |
| 1997 | 49° | 25° | 37° | — | — |
| 1996warmest | 58° | 40° | 49° | 0.36" | — |
| 1995 | 57° | 37° | 47° | — | — |
| 1994 | 43° | 30° | 36° | 0.03" | — |
| 1993 | 31° | 19° | 25° | 0.15" | 0.6" |
| 1992 | 51° | 34° | 42° | — | — |
| 1991 | 43° | 24° | 33° | — | — |
| 1990 | 37° | 14° | 26° | — | — |
| 1989 | 41° | 34° | 37° | 0.23" | — |
| 1988 | 47° | 28° | 37° | 0.03" | 0.1" |
| 1987 | 44° | 26° | 35° | — | — |
| 1986 | 57° | 38° | 47° | 0.56" | — |
| 1985 | 32° | 21° | 27° | — | — |
| 1984 | 39° | 19° | 29° | — | — |
| 1983 | 54° | 40° | 47° | 0.1" | — |
| 1982 | 46° | 30° | 38° | 0.13" | — |
| 1981 | 51° | 38° | 44° | 0.25" | — |
| 1980 | 51° | 44° | 48° | 0.28" | — |
| 1979 | 46° | 36° | 41° | 0.08" | — |
| 1978 | 35° | 26° | 31° | — | — |
| 1977 | 57° | 28° | 43° | — | — |
| 1976 | 43° | 31° | 37° | — | — |
| 1975 | 40° | 20° | 30° | — | — |
| 1974 | 43° | 33° | 38° | 0.61" | 1.6" |
| 1973 | 45° | 29° | 37° | — | — |
| 1972 | 57° | 37° | 47° | — | — |
| 1971 | 48° | 30° | 39° | 0.46" | — |
56 years of data from BOISE AIR TERMINAL