Weather on March 18
Boise, ID
55 Years of Data
About This Date
March 18th in Boise, ID typically brings cool spring weather, with average highs around 56°F and lows near 34°F. Over 56 years of records, the warmest March 18th was in 2026 (61°F average), while the coldest was 2002 (30°F) — a 31°F range across recorded history. Precipitation has occurred on 23% of recorded March 18th dates, with snow falling 4% of the time. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Boise, ID? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 80° | 42° | 61° | — | — |
| 2025 | 46° | 29° | 38° | — | — |
| 2024 | 70° | 39° | 54° | — | — |
| 2023 | 54° | 29° | 42° | — | — |
| 2022 | 60° | 35° | 48° | — | — |
| 2021 | 69° | 41° | 55° | — | — |
| 2020 | 49° | 36° | 42° | — | — |
| 2019 | 63° | 35° | 49° | — | — |
| 2018 | 51° | 35° | 43° | — | — |
| 2017 | 63° | 52° | 57° | — | — |
| 2016 | 53° | 28° | 41° | — | — |
| 2015 | 59° | 38° | 48° | — | — |
| 2014 | 48° | 26° | 37° | — | — |
| 2013 | 51° | 25° | 38° | — | — |
| 2012 | 41° | 34° | 37° | 0.43" | 0.4" |
| 2011 | 56° | 36° | 46° | — | — |
| 2010 | 55° | 33° | 44° | — | — |
| 2009 | 60° | 34° | 47° | — | — |
| 2008 | 53° | 39° | 46° | 0.41" | — |
| 2007 | 67° | 39° | 53° | — | — |
| 2006 | 49° | 32° | 40° | — | — |
| 2005 | 54° | 29° | 41° | — | — |
| 2004 | 72° | 46° | 59° | — | — |
| 2003 | 56° | 33° | 44° | — | — |
| 2002coldest | 40° | 20° | 30° | — | — |
| 2001 | 55° | 39° | 47° | — | — |
| 2000 | 54° | 30° | 42° | 0.15" | — |
| 1999 | 68° | 36° | 52° | — | — |
| 1998 | 53° | 25° | 39° | — | — |
| 1997 | 73° | 45° | 59° | — | — |
| 1996 | 57° | 30° | 44° | — | — |
| 1995 | 54° | 42° | 48° | 0.97" | — |
| 1994 | 62° | 41° | 52° | — | — |
| 1993 | 57° | 44° | 51° | 0.38" | — |
| 1992 | 57° | 28° | 43° | — | — |
| 1991 | 63° | 42° | 52° | — | — |
| 1990 | 69° | 39° | 54° | — | — |
| 1989 | 57° | 40° | 48° | 0.66" | — |
| 1988 | 62° | 29° | 45° | — | — |
| 1987 | 45° | 30° | 37° | 1.17" | — |
| 1986 | 51° | 31° | 41° | — | — |
| 1985 | 57° | 33° | 45° | — | — |
| 1984 | 50° | 26° | 38° | — | — |
| 1983 | 46° | 33° | 40° | 0.25" | — |
| 1982 | 49° | 31° | 40° | 0.81" | — |
| 1981 | 52° | 24° | 38° | — | — |
| 1980 | 49° | 33° | 41° | 0.74" | — |
| 1979 | 55° | 29° | 42° | — | — |
| 1978 | 68° | 37° | 53° | — | — |
| 1977 | 45° | 20° | 32° | 0.08" | 0.2" |
| 1976 | 59° | 39° | 49° | — | — |
| 1975 | 57° | 41° | 49° | 0.23" | — |
| 1974 | 53° | 32° | 43° | — | — |
| 1973 | 50° | 23° | 37° | — | — |
| 1972 | 57° | 44° | 51° | 1.4" | — |
| 1971 | 46° | 22° | 34° | — | — |
Boise, ID Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Boise, ID Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Boise, ID Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Boise, ID
Boise, ID has no months that meet our "pleasant" threshold — every season has tradeoffs.