Weather on May 21
Chico, CA
55 Years of Data
Avg High
81°F
Avg Low
53°F
Warmest
2017
81°F avg
Coldest
2002
52°F avg
About This Date
May 21st in Chico, CA typically brings warm spring weather, with average highs around 81°F and lows near 53°F — a 28°F daily swing. Over 55 years of records, the warmest May 21st was in 2017 (81°F average), while the coldest was 2002 (52°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 21st dates historically, with the wettest May 21st recording 1.6" of rain. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Chico, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 64° | 74° | — | — |
| 2024 | 79° | 61° | 70° | — | — |
| 2023 | 84° | 60° | 72° | — | — |
| 2022 | 82° | 62° | 72° | — | — |
| 2021 | 69° | 45° | 57° | — | — |
| 2020 | 76° | 58° | 67° | — | — |
| 2019 | 68° | 43° | 55° | 0.13" | — |
| 2018 | 75° | 51° | 63° | — | — |
| 2017warmest | 91° | 71° | 81° | — | — |
| 2016 | 62° | 46° | 54° | — | — |
| 2015 | 80° | 54° | 67° | — | — |
| 2014 | 82° | 55° | 69° | — | — |
| 2013 | 80° | 52° | 66° | — | — |
| 2012 | 96° | 48° | 72° | — | — |
| 2011 | 80° | 57° | 69° | — | — |
| 2010 | 77° | 45° | 61° | — | — |
| 2009 | 89° | 51° | 70° | — | — |
| 2008 | 85° | 64° | 74° | — | — |
| 2007 | 86° | 54° | 70° | — | — |
| 2006 | 73° | 58° | 65° | — | — |
| 2005 | 86° | 48° | 67° | — | — |
| 2004 | 81° | 53° | 67° | — | — |
| 2003 | 93° | 55° | 74° | — | — |
| 2002coldest | 58° | 46° | 52° | 1.6" | — |
| 2001 | 98° | 57° | 78° | — | — |
| 2000 | 98° | 61° | 79° | — | — |
| 1999 | 87° | 55° | 71° | — | — |
| 1998 | 73° | 51° | 62° | — | — |
| 1997 | 82° | 55° | 69° | — | — |
| 1996 | 75° | 50° | 63° | 0.43" | — |
| 1995 | 85° | 51° | 68° | — | — |
| 1994 | 74° | 50° | 62° | — | — |
| 1993 | 78° | 51° | 65° | — | — |
| 1992 | 82° | 57° | 70° | — | — |
| 1991 | 78° | 48° | 63° | — | — |
| 1990 | 63° | 55° | 59° | 0.05" | — |
| 1989 | 81° | 61° | 71° | — | — |
| 1988 | 93° | 54° | 73° | — | — |
| 1987 | 81° | 46° | 63° | — | — |
| 1986 | 75° | 50° | 63° | — | — |
| 1985 | 86° | 50° | 68° | — | — |
| 1984 | 90° | 51° | 70° | — | — |
| 1983 | 95° | 58° | 76° | — | — |
| 1982 | 87° | 52° | 69° | — | — |
| 1981 | 72° | 52° | 62° | — | — |
| 1980 | 89° | 52° | 70° | — | — |
| 1979 | 80° | 54° | 67° | — | — |
| 1978 | 91° | 55° | 73° | — | — |
| 1977 | 83° | 54° | 68° | — | — |
| 1976 | 87° | 56° | 71° | — | — |
| 1975 | 71° | 51° | 61° | — | — |
| 1974 | 73° | 45° | 59° | — | — |
| 1973 | 75° | 53° | 64° | — | — |
| 1972 | 68° | 47° | 57° | 1.35" | — |
| 1971 | 80° | 51° | 66° | — | — |
55 years of data from CHICO UNIV FARM