Weather on March 20
Sunnyvale, CA
55 Years of Data
Avg High
66°F
Avg Low
48°F
Warmest
2026
73°F avg
Coldest
1975
47°F avg
About This Date
March 20th in Sunnyvale, CA typically brings mild spring weather, with average highs around 66°F and lows near 48°F. Over 56 years of records, the warmest March 20th was in 2026 (73°F average), while the coldest was 1975 (47°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 27% of March 20th dates historically, with the wettest March 20th recording 2.29" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for March 20th in Sunnyvale, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 86° | 61° | 73° | — | — |
| 2025 | 61° | 48° | 55° | — | — |
| 2024 | 71° | 46° | 59° | — | — |
| 2023 | 61° | 49° | 55° | — | — |
| 2022 | 68° | 44° | 56° | — | — |
| 2021 | 60° | 38° | 49° | — | — |
| 2020 | 65° | 41° | 53° | — | — |
| 2019 | 63° | 48° | 55° | 0.46" | — |
| 2018 | 58° | 53° | 55° | 0.23" | — |
| 2017 | 63° | 55° | 59° | 0.53" | — |
| 2016 | 73° | 52° | 62° | — | — |
| 2015 | 70° | 49° | 59° | — | — |
| 2014 | 73° | 51° | 62° | — | — |
| 2013 | 69° | 52° | 60° | 0.13" | — |
| 2012 | 66° | 51° | 59° | — | — |
| 2011 | 56° | 46° | 51° | 1.19" | — |
| 2010 | 68° | 46° | 57° | — | — |
| 2009 | 63° | 50° | 56° | — | — |
| 2008 | 61° | 43° | 52° | — | — |
| 2007 | 60° | 48° | 54° | 0.3" | — |
| 2006 | 53° | 43° | 48° | 2.29" | — |
| 2005 | 63° | 51° | 57° | 0.23" | — |
| 2004 | 82° | 48° | 65° | — | — |
| 2003 | 63° | 49° | 56° | — | — |
| 2002 | 71° | 45° | 58° | — | — |
| 2001 | 78° | 56° | 67° | — | — |
| 2000 | 67° | 47° | 57° | — | — |
| 1999 | 58° | 43° | 50° | 0.03" | — |
| 1998 | 66° | 55° | 61° | — | — |
| 1997 | 79° | 54° | 66° | — | — |
| 1996 | 73° | 47° | 60° | — | — |
| 1995 | 59° | 52° | 55° | 1.04" | — |
| 1994 | 65° | 44° | 54° | — | — |
| 1993 | 71° | 48° | 60° | — | — |
| 1992 | 69° | 55° | 62° | 0.94" | — |
| 1991 | 56° | 47° | 51° | 0.74" | — |
| 1990 | 74° | 49° | 61° | — | — |
| 1989 | 74° | 50° | 62° | — | — |
| 1988 | 72° | 49° | 60° | — | — |
| 1987 | 62° | 39° | 51° | — | — |
| 1986 | 72° | 47° | 59° | — | — |
| 1985 | 65° | 47° | 56° | — | — |
| 1984 | 72° | 54° | 63° | — | — |
| 1983 | 58° | 48° | 53° | 1.5" | — |
| 1982 | 61° | 39° | 50° | — | — |
| 1981 | 55° | 41° | 48° | 0.94" | — |
| 1980 | 61° | 47° | 54° | — | — |
| 1979 | 63° | 44° | 53° | — | — |
| 1978 | 70° | 54° | 62° | — | — |
| 1977 | 65° | 45° | 55° | — | — |
| 1976 | 68° | 48° | 58° | — | — |
| 1975coldest | 55° | 40° | 47° | — | — |
| 1974 | 65° | 46° | 55° | — | — |
| 1973 | 57° | 45° | 51° | 0.15" | — |
| 1972 | 60° | 47° | 53° | — | — |
| 1971 | 72° | 44° | 58° | — | — |
56 years of data from MOFFETT FED AIRFIELD