Weather on January 21
Vacaville, CA
55 Years of Data
Avg High
58°F
Avg Low
38°F
Warmest
1981
55°F avg
Coldest
1985
39°F avg
About This Date
January 21st in Vacaville, CA typically brings cool winter weather, with average highs around 58°F and lows near 38°F. Over 56 years of records, the warmest January 21st was in 1981 (55°F average), while the coldest was 1985 (39°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 34% of January 21st dates historically, with the wettest January 21st recording 2.51" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for January 21st in Vacaville, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 51° | 42° | 47° | — | — |
| 2025 | 60° | 28° | 44° | — | — |
| 2024 | 59° | 52° | 55° | 1.93" | — |
| 2023 | 56° | 29° | 43° | — | — |
| 2022 | 66° | 37° | 52° | — | — |
| 2021 | 64° | 29° | 47° | — | — |
| 2020 | 58° | 40° | 49° | 0.13" | — |
| 2019 | 62° | 44° | 53° | — | — |
| 2018 | 56° | 30° | 43° | — | — |
| 2017 | 56° | 46° | 51° | 1.3" | — |
| 2016 | 60° | 46° | 53° | — | — |
| 2015 | 60° | 38° | 49° | — | — |
| 2014 | 73° | 27° | 50° | — | — |
| 2013 | 61° | 27° | 44° | — | — |
| 2012 | 57° | 37° | 47° | 0.36" | — |
| 2011 | 65° | 34° | 49° | — | — |
| 2010 | 47° | 42° | 44° | 2.51" | — |
| 2009 | 61° | 45° | 53° | 0.38" | — |
| 2008 | 46° | 34° | 40° | 1.3" | — |
| 2007 | 64° | 45° | 54° | — | — |
| 2006 | 55° | 46° | 51° | 0.03" | — |
| 2005 | 45° | 41° | 43° | 0.03" | — |
| 2004 | 64° | 34° | 49° | — | — |
| 2003 | 49° | 44° | 46° | 1.02" | — |
| 2002 | 55° | 28° | 42° | — | — |
| 2001 | 59° | 33° | 46° | — | — |
| 2000 | 59° | 42° | 51° | — | — |
| 1999 | 60° | 44° | 52° | — | — |
| 1998 | 55° | 36° | 45° | — | — |
| 1997 | 55° | 42° | 49° | 1.07" | — |
| 1996 | 57° | 42° | 50° | 1.09" | — |
| 1995 | 51° | 44° | 48° | 0.51" | — |
| 1994 | 64° | 39° | 52° | — | — |
| 1993 | 58° | 38° | 48° | 0.18" | — |
| 1992 | 48° | 35° | 42° | — | — |
| 1991 | 64° | — | — | — | — |
| 1990 | 57° | 29° | 43° | — | — |
| 1989 | 60° | 34° | 47° | — | — |
| 1988 | 72° | 35° | 53° | — | — |
| 1987 | 56° | 29° | 42° | — | — |
| 1986 | 56° | 39° | 47° | — | — |
| 1985coldest | 42° | 36° | 39° | — | — |
| 1984 | 59° | 42° | 51° | — | — |
| 1983 | 48° | 38° | 43° | 0.13" | — |
| 1982 | 51° | 31° | 41° | 0.05" | — |
| 1981warmest | 60° | 50° | 55° | 0.18" | — |
| 1980 | 61° | 31° | 46° | — | — |
| 1979 | 60° | 37° | 49° | — | — |
| 1978 | 56° | 40° | 48° | — | — |
| 1977 | 52° | 39° | 45° | 0.05" | — |
| 1976 | 70° | 29° | 49° | — | — |
| 1975 | 58° | 35° | 46° | — | — |
| 1974 | 57° | 42° | 50° | — | — |
| 1973 | 51° | 33° | 42° | 1.27" | — |
| 1972 | 55° | 45° | 50° | — | — |
| 1971 | 65° | 33° | 49° | — | — |
56 years of data from VACAVILLE/NUT TREE AP ASOS