Weather on March 31
Pomona, CA
55 Years of Data
Avg High
72°F
Avg Low
46°F
Warmest
2011
76°F avg
Coldest
1999
47°F avg
About This Date
March 31st in Pomona, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 46°F — a 26°F daily swing. Over 53 years of records, the warmest March 31st was in 2011 (76°F average), while the coldest was 1999 (47°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 6% of March 31st dates historically, with the wettest March 31st recording 1.68" of rain. The last decade has been 4.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.1°F cooler on this date compared to 20-30 years ago.
Planning for March 31st in Pomona, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 65° | 55° | 60° | — | — |
| 2025 | 64° | 49° | 56° | — | — |
| 2024 | 55° | 43° | 49° | — | — |
| 2023 | 63° | 37° | 50° | — | — |
| 2022 | 60° | 52° | 56° | — | — |
| 2021 | 84° | 52° | 68° | — | — |
| 2020 | 75° | 49° | 62° | — | — |
| 2019 | 81° | 50° | 65° | — | — |
| 2018 | 78° | 53° | 66° | — | — |
| 2017 | 68° | 43° | 55° | — | — |
| 2016 | 69° | 42° | 56° | — | — |
| 2015 | 77° | 51° | 64° | — | — |
| 2014 | 70° | 44° | 57° | — | — |
| 2013 | 70° | 46° | 58° | — | — |
| 2012 | 62° | 48° | 55° | 0.43" | — |
| 2011warmest | 95° | 57° | 76° | — | — |
| 2010 | 60° | 42° | 51° | — | — |
| 2009 | 75° | 45° | 60° | — | — |
| 2008 | 66° | 43° | 54° | — | — |
| 2007 | 82° | 57° | 70° | — | — |
| 2006 | 56° | 48° | 52° | 0.3" | — |
| 2005 | 81° | 47° | 64° | — | — |
| 2004 | 84° | 50° | 67° | — | — |
| 2003 | 87° | 54° | 70° | — | — |
| 2002 | 70° | 48° | 59° | — | — |
| 2001 | 75° | 55° | 65° | — | — |
| 2000 | 75° | 57° | 66° | — | — |
| 1999coldest | 52° | 43° | 47° | — | — |
| 1995 | 79° | 43° | 61° | — | — |
| 1994 | 76° | 50° | 63° | — | — |
| 1993 | 75° | 44° | 60° | — | — |
| 1992 | 62° | 44° | 53° | — | — |
| 1991 | 73° | 48° | 61° | — | — |
| 1990 | 70° | 41° | 55° | — | — |
| 1989 | 92° | 45° | 68° | — | — |
| 1988 | 76° | 40° | 58° | — | — |
| 1987 | 89° | 40° | 64° | — | — |
| 1986 | 75° | 53° | 64° | — | — |
| 1985 | 82° | 41° | 62° | — | — |
| 1984 | 64° | 40° | 52° | — | — |
| 1983 | 77° | 46° | 62° | — | — |
| 1982 | 67° | 39° | 53° | — | — |
| 1981 | 73° | 44° | 59° | — | — |
| 1980 | 66° | 48° | 57° | — | — |
| 1979 | 73° | 41° | 57° | — | — |
| 1978 | 65° | 52° | 58° | 1.68" | — |
| 1977 | 60° | 36° | 48° | — | — |
| 1976 | 79° | 48° | 63° | — | — |
| 1975 | 73° | 37° | 55° | — | — |
| 1974 | 61° | 46° | 53° | — | — |
| 1973 | 60° | 40° | 50° | — | — |
| 1972 | 75° | 43° | 59° | — | — |
| 1971 | 72° | 49° | 60° | — | — |
53 years of data from POMONA/FAIRPLEX