Weather on March 21
Modesto, CA
55 Years of Data
Avg High
69°F
Avg Low
47°F
Warmest
2026
71°F avg
Coldest
1973
45°F avg
About This Date
March 21st in Modesto, CA typically brings mild spring weather, with average highs around 69°F and lows near 47°F. Over 56 years of records, the warmest March 21st was in 2026 (71°F average), while the coldest was 1973 (45°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 32% of March 21st dates historically, with the wettest March 21st recording 1.63" of rain. The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Modesto, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 83° | 59° | 71° | — | — |
| 2025 | 67° | 46° | 56° | — | — |
| 2024 | 72° | 49° | 60° | — | — |
| 2023 | 60° | 46° | 53° | 1.63" | — |
| 2022 | 78° | 45° | 61° | — | — |
| 2021 | 65° | 43° | 54° | — | — |
| 2020 | 64° | 45° | 54° | 0.28" | — |
| 2019 | 65° | 44° | 54° | — | — |
| 2018 | 66° | 53° | 60° | 0.69" | — |
| 2017 | 73° | 53° | 63° | 0.46" | — |
| 2016 | 70° | 49° | 59° | 0.71" | — |
| 2015 | 77° | 51° | 64° | — | — |
| 2014 | 77° | 48° | 63° | — | — |
| 2013 | 67° | 45° | 56° | — | — |
| 2012 | 71° | 43° | 57° | — | — |
| 2011 | 56° | 43° | 49° | 0.18" | — |
| 2010 | 71° | 47° | 59° | — | — |
| 2009 | 66° | 48° | 57° | 0.41" | — |
| 2008 | 70° | 43° | 56° | — | — |
| 2007 | 71° | 49° | 60° | 0.03" | — |
| 2006 | 61° | 41° | 51° | 0.05" | — |
| 2005 | 64° | 45° | 54° | 0.43" | — |
| 2004 | 80° | 54° | 67° | — | — |
| 2003 | 70° | 47° | 58° | — | — |
| 2002 | 75° | 47° | 61° | — | — |
| 2001 | 77° | 55° | 66° | — | — |
| 2000 | 71° | 43° | 57° | — | — |
| 1999 | 65° | 43° | 54° | — | — |
| 1998 | 75° | 53° | 64° | 0.03" | — |
| 1997 | 76° | 59° | 67° | — | — |
| 1996 | 77° | 50° | 64° | — | — |
| 1995 | 61° | 46° | 53° | 0.23" | — |
| 1994 | 67° | 47° | 57° | — | — |
| 1993 | 74° | 50° | 62° | — | — |
| 1992 | 69° | 52° | 60° | — | — |
| 1991 | 58° | 43° | 50° | — | — |
| 1990 | 79° | 52° | 65° | — | — |
| 1989 | 78° | 46° | 62° | — | — |
| 1988 | 74° | 49° | 61° | — | — |
| 1987 | 58° | 40° | 49° | 1.3" | — |
| 1986 | 76° | 49° | 62° | — | — |
| 1985 | 64° | 46° | 55° | — | — |
| 1984 | 69° | 49° | 59° | — | — |
| 1983 | 62° | 43° | 52° | 0.03" | — |
| 1982 | 65° | 39° | 52° | — | — |
| 1981 | 66° | 48° | 57° | 0.48" | — |
| 1980 | 64° | 38° | 51° | — | — |
| 1979 | 65° | 45° | 55° | — | — |
| 1978 | 73° | 58° | 65° | 1.27" | — |
| 1977 | 75° | 42° | 59° | — | — |
| 1976 | 75° | 40° | 57° | — | — |
| 1975 | 55° | 38° | 46° | 0.84" | — |
| 1974 | 66° | 49° | 57° | — | — |
| 1973coldest | 49° | 41° | 45° | 1.32" | — |
| 1972 | 75° | 48° | 62° | — | — |
| 1971 | 76° | 42° | 59° | — | — |
56 years of data from MODESTO AP