Weather on August 21
Meridian, ID
55 Years of Data
Avg High
88°F
Avg Low
56°F
Warmest
2022
85°F avg
Coldest
1995
59°F avg
About This Date
August 21st in Meridian, ID typically brings warm summer weather, with average highs around 88°F and lows near 56°F — a 32°F daily swing. Over 55 years of records, the warmest August 21st was in 2022 (85°F average), while the coldest was 1995 (59°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of August 21st dates historically, with the wettest August 21st recording 0.94" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Meridian, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 61° | 76° | — | — |
| 2024 | 88° | 61° | 74° | — | — |
| 2023 | 87° | 66° | 77° | 0.94" | — |
| 2022warmest | 100° | 69° | 85° | — | — |
| 2021 | 77° | 57° | 67° | 0.13" | — |
| 2020 | 92° | 66° | 79° | — | — |
| 2019 | 97° | 66° | 81° | — | — |
| 2018 | 81° | 55° | 68° | — | — |
| 2017 | 88° | 56° | 72° | — | — |
| 2016 | 95° | 63° | 79° | — | — |
| 2015 | 88° | 59° | 73° | — | — |
| 2014 | 83° | 58° | 70° | — | — |
| 2013 | 92° | 62° | 77° | — | — |
| 2012 | 94° | 72° | 83° | — | — |
| 2011 | 99° | 63° | 81° | — | — |
| 2010 | 94° | 63° | 78° | — | — |
| 2009 | 97° | 67° | 82° | — | — |
| 2008 | 83° | 61° | 72° | — | — |
| 2007 | 80° | 55° | 68° | — | — |
| 2006 | 100° | 65° | 82° | — | — |
| 2005 | 101° | 66° | 83° | — | — |
| 2004 | 94° | 67° | 80° | 0.03" | — |
| 2003 | 89° | 66° | 78° | 0.03" | — |
| 2002 | 75° | 54° | 64° | — | — |
| 2001 | 89° | 55° | 72° | — | — |
| 2000 | 83° | 49° | 66° | — | — |
| 1999 | 90° | 66° | 78° | — | — |
| 1998 | 90° | 58° | 74° | — | — |
| 1997 | 93° | 60° | 77° | — | — |
| 1996 | 82° | 50° | 66° | — | — |
| 1995coldest | 93° | 24° | 59° | — | — |
| 1994 | 88° | 39° | 63° | — | — |
| 1993 | 80° | 47° | 63° | — | — |
| 1992 | 94° | 56° | 75° | — | — |
| 1991 | 98° | 65° | 81° | — | — |
| 1990 | 80° | 53° | 67° | 0.03" | — |
| 1989 | 83° | 59° | 71° | — | — |
| 1988 | 81° | 42° | 61° | — | — |
| 1987 | 87° | 49° | 68° | — | — |
| 1986 | 92° | 61° | 76° | 0.1" | — |
| 1985 | 81° | 51° | 66° | — | — |
| 1984 | 89° | 43° | 66° | — | — |
| 1983 | 80° | 59° | 70° | — | — |
| 1982 | 91° | 55° | 73° | — | — |
| 1981 | 85° | 50° | 67° | — | — |
| 1980 | 86° | 48° | 67° | — | — |
| 1979 | 80° | 57° | 69° | — | — |
| 1978 | 84° | 45° | 64° | — | — |
| 1977 | 89° | 66° | 78° | — | — |
| 1976 | 90° | 49° | 69° | — | — |
| 1975 | 75° | 49° | 62° | — | — |
| 1974 | 85° | 46° | 65° | — | — |
| 1973 | 87° | 57° | 72° | — | — |
| 1972 | 83° | 50° | 66° | — | — |
| 1971 | 89° | 50° | 70° | — | — |
55 years of data from KUNA