Weather on August 21
Nampa, ID
55 Years of Data
Avg High
90°F
Avg Low
55°F
Warmest
1977
84°F avg
Coldest
1980
62°F avg
About This Date
August 21st in Nampa, ID typically brings hot summer weather, with average highs around 90°F and lows near 55°F — a 35°F daily swing. Over 44 years of records, the warmest August 21st was in 1977 (84°F average), while the coldest was 1980 (62°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 7% of August 21st dates historically, with the wettest August 21st recording 0.74" of rain.
Planning for August 21st in Nampa, ID? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2014 | 85° | 58° | 71° | — | — |
| 2013 | 92° | 63° | 77° | — | — |
| 2012 | 94° | 61° | 77° | — | — |
| 2011 | 93° | 58° | 75° | — | — |
| 2010 | 94° | 54° | 74° | — | — |
| 2009 | 100° | 57° | 79° | — | — |
| 2008 | 90° | 60° | 75° | — | — |
| 2007 | 84° | 52° | 68° | 0.03" | — |
| 2006 | 95° | 51° | 73° | — | — |
| 2005 | 97° | 59° | 78° | — | — |
| 2004 | 93° | 62° | 78° | — | — |
| 2003 | 92° | 57° | 74° | — | — |
| 2002 | 82° | 55° | 69° | — | — |
| 2001 | 92° | 53° | 72° | — | — |
| 2000 | 80° | 51° | 66° | — | — |
| 1999 | 98° | 62° | 80° | — | — |
| 1998 | 96° | 52° | 74° | — | — |
| 1997 | 97° | 56° | 76° | — | — |
| 1996 | 86° | 54° | 70° | — | — |
| 1995 | 94° | 45° | 69° | — | — |
| 1994 | 92° | 52° | 72° | — | — |
| 1993 | 88° | 57° | 72° | — | — |
| 1992 | 95° | 56° | 75° | — | — |
| 1991 | 97° | 67° | 82° | — | — |
| 1990 | 74° | 52° | 63° | 0.74" | — |
| 1989 | 84° | 51° | 68° | — | — |
| 1988 | 83° | 49° | 66° | — | — |
| 1987 | 88° | 53° | 70° | — | — |
| 1986 | 93° | 59° | 76° | 0.1" | — |
| 1985 | 84° | 47° | 65° | — | — |
| 1984 | 85° | 51° | 68° | — | — |
| 1983 | 83° | 60° | 71° | — | — |
| 1982 | 98° | 60° | 79° | — | — |
| 1981 | 88° | 50° | 69° | — | — |
| 1980coldest | 83° | 42° | 62° | — | — |
| 1979 | 76° | 53° | 64° | — | — |
| 1978 | 84° | 48° | 66° | — | — |
| 1977warmest | 96° | 72° | 84° | — | — |
| 1976 | 95° | 54° | 74° | — | — |
| 1975 | 80° | 51° | 66° | — | — |
| 1974 | 88° | 45° | 66° | — | — |
| 1973 | 94° | 61° | 77° | — | — |
| 1972 | 93° | 54° | 73° | — | — |
| 1971 | 96° | 59° | 78° | — | — |
44 years of data from NAMPA SUGAR FACTORY