Weather on May 20
Nampa, ID
55 Years of Data
Avg High
75°F
Avg Low
45°F
Warmest
2008
74°F avg
Coldest
1975
49°F avg
About This Date
May 20th in Nampa, ID typically brings pleasant spring weather, with average highs around 75°F and lows near 45°F — a 30°F daily swing. Over 45 years of records, the warmest May 20th was in 2008 (74°F average), while the coldest was 1975 (49°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of May 20th dates historically, with the wettest May 20th recording 0.91" of rain.
Planning for May 20th in Nampa, ID? Great weather for outdoor activities.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2015 | 74° | 46° | 60° | 0.13" | — |
| 2014 | 71° | 46° | 59° | — | — |
| 2013 | 72° | 45° | 58° | — | — |
| 2012 | 80° | 42° | 61° | — | — |
| 2011 | 75° | 48° | 62° | — | — |
| 2010 | 73° | 47° | 60° | 0.08" | — |
| 2009 | 84° | 44° | 64° | — | — |
| 2008warmest | 90° | 58° | 74° | — | — |
| 2007 | 92° | 54° | 73° | — | — |
| 2006 | 89° | 56° | 72° | 0.64" | — |
| 2005 | 72° | 49° | 60° | 0.15" | — |
| 2004 | 66° | 42° | 54° | — | — |
| 2003 | 66° | 40° | 53° | — | — |
| 2002 | 88° | 52° | 70° | — | — |
| 2001 | 81° | 44° | 62° | — | — |
| 2000 | 80° | 48° | 64° | — | — |
| 1999 | 76° | 46° | 61° | — | — |
| 1998 | 76° | 44° | 60° | — | — |
| 1997 | 83° | 54° | 68° | — | — |
| 1996 | 63° | 38° | 50° | — | — |
| 1995 | 75° | 39° | 57° | — | — |
| 1994 | 65° | 43° | 54° | 0.74" | — |
| 1993 | 89° | 55° | 72° | — | — |
| 1992 | 85° | 45° | 65° | 0.36" | — |
| 1991 | 64° | 40° | 52° | 0.03" | — |
| 1990 | 69° | 48° | 59° | — | — |
| 1989 | 65° | 35° | 50° | — | — |
| 1988 | 71° | 40° | 55° | — | — |
| 1987 | 66° | 40° | 53° | — | — |
| 1986 | 85° | 55° | 70° | — | — |
| 1985 | 84° | 49° | 66° | 0.64" | — |
| 1984 | 83° | 54° | 68° | — | — |
| 1983 | 71° | 42° | 57° | — | — |
| 1982 | 68° | 33° | 51° | — | — |
| 1981 | 62° | 47° | 54° | 0.91" | — |
| 1980 | 84° | 40° | 62° | — | — |
| 1979 | 78° | 45° | 61° | — | — |
| 1978 | 76° | 40° | 58° | — | — |
| 1977 | 70° | 34° | 52° | — | — |
| 1976 | 79° | 40° | 59° | — | — |
| 1975coldest | 65° | 34° | 49° | — | — |
| 1974 | 67° | 44° | 55° | — | — |
| 1973 | 71° | 50° | 61° | — | — |
| 1972 | 78° | 52° | 65° | 0.1" | — |
| 1971 | 65° | 36° | 50° | — | — |
45 years of data from NAMPA SUGAR FACTORY