Weather on May 21
Meridian, ID
55 Years of Data
Avg High
72°F
Avg Low
45°F
Warmest
2023
77°F avg
Coldest
2010
47°F avg
About This Date
May 21st in Meridian, ID typically brings pleasant spring weather, with average highs around 72°F and lows near 45°F — a 27°F daily swing. Over 55 years of records, the warmest May 21st was in 2023 (77°F average), while the coldest was 2010 (47°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 27% of May 21st dates historically, with the wettest May 21st recording 2.03" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Meridian, ID? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 40° | 55° | — | — |
| 2024 | 69° | 39° | 54° | — | — |
| 2023warmest | 91° | 62° | 77° | 0.08" | — |
| 2022 | 68° | 42° | 55° | — | — |
| 2021 | 55° | 42° | 49° | 0.08" | — |
| 2020 | 60° | 46° | 53° | 0.28" | — |
| 2019 | 60° | 45° | 52° | 1.7" | — |
| 2018 | 78° | 54° | 66° | — | — |
| 2017 | 75° | 49° | 62° | — | — |
| 2016 | 58° | 46° | 52° | 0.13" | — |
| 2015 | 73° | 52° | 62° | 0.08" | — |
| 2014 | 76° | 50° | 63° | 0.15" | — |
| 2013 | 85° | 52° | 68° | — | — |
| 2012 | 87° | 63° | 75° | — | — |
| 2011 | 74° | 48° | 61° | — | — |
| 2010coldest | 58° | 37° | 47° | 0.03" | — |
| 2009 | 78° | 42° | 60° | — | — |
| 2008 | 59° | 42° | 51° | — | — |
| 2007 | 57° | 43° | 50° | 0.03" | — |
| 2006 | 82° | 55° | 69° | 0.18" | — |
| 2005 | 68° | 41° | 55° | — | — |
| 2004 | 68° | 51° | 60° | 0.1" | — |
| 2003 | 76° | 48° | 62° | — | — |
| 2002 | 59° | 44° | 52° | 0.03" | — |
| 2001 | 74° | 37° | 55° | — | — |
| 2000 | 87° | 53° | 70° | — | — |
| 1999 | 76° | 48° | 62° | — | — |
| 1998 | 56° | 42° | 49° | 2.03" | — |
| 1997 | 81° | 44° | 62° | — | — |
| 1996 | 66° | — | — | — | — |
| 1995 | 75° | 48° | 62° | — | — |
| 1994 | 72° | 46° | 59° | — | — |
| 1993 | 80° | 56° | 68° | — | — |
| 1992 | 68° | 43° | 55° | — | — |
| 1991 | 75° | 42° | 59° | — | — |
| 1990 | 72° | 51° | 61° | — | — |
| 1989 | 76° | 43° | 59° | — | — |
| 1988 | 86° | 39° | 63° | — | — |
| 1987 | 68° | 35° | 52° | — | — |
| 1986 | 70° | 45° | 57° | — | — |
| 1985 | 75° | 47° | 61° | 0.08" | — |
| 1984 | 64° | 43° | 53° | — | — |
| 1983 | 73° | 40° | 56° | — | — |
| 1982 | 80° | 41° | 61° | — | — |
| 1981 | 65° | 49° | 57° | — | — |
| 1980 | 90° | 55° | 72° | — | — |
| 1979 | 81° | 45° | 63° | — | — |
| 1978 | 83° | 44° | 63° | — | — |
| 1977 | 75° | 40° | 57° | — | — |
| 1976 | 74° | 32° | 53° | — | — |
| 1975 | 66° | 44° | 55° | — | — |
| 1974 | 69° | 29° | 49° | — | — |
| 1973 | 69° | 33° | 51° | — | — |
| 1972 | 65° | 41° | 53° | 0.64" | — |
| 1971 | 67° | 40° | 53° | — | — |
55 years of data from KUNA