Weather on March 20
Pomona, CA
55 Years of Data
Avg High
71°F
Avg Low
47°F
Warmest
2026
79°F avg
Coldest
1999
49°F avg
About This Date
March 20th in Pomona, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 47°F. Over 52 years of records, the warmest March 20th was in 2026 (79°F average), while the coldest was 1999 (49°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 13% of March 20th dates historically, with the wettest March 20th recording 2.69" of rain. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for March 20th in Pomona, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 94° | 64° | 79° | — | — |
| 2025 | 72° | 48° | 60° | — | — |
| 2024 | 73° | 49° | 61° | — | — |
| 2023 | 56° | 47° | 51° | — | — |
| 2022 | 70° | 48° | 59° | — | — |
| 2021 | 64° | 44° | 54° | — | — |
| 2020 | 60° | 43° | 51° | — | — |
| 2019 | 61° | 46° | 53° | — | — |
| 2018 | 73° | 48° | 61° | — | — |
| 2017 | 70° | 48° | 59° | — | — |
| 2016 | 75° | 49° | 62° | — | — |
| 2015 | 82° | 49° | 65° | — | — |
| 2014 | 78° | 49° | 63° | — | — |
| 2013 | 69° | 49° | 59° | — | — |
| 2012 | 72° | 39° | 55° | — | — |
| 2011 | 54° | 46° | 50° | — | — |
| 2010 | 84° | 49° | 66° | — | — |
| 2009 | 73° | 51° | 62° | — | — |
| 2008 | 71° | 45° | 58° | — | — |
| 2007 | 63° | 49° | 56° | — | — |
| 2006 | 59° | 42° | 51° | 1.98" | — |
| 2005 | 67° | 47° | 57° | — | — |
| 2004 | 80° | 54° | 67° | — | — |
| 2003 | 80° | 46° | 63° | — | — |
| 2002 | 81° | 43° | 62° | — | — |
| 2001 | 87° | 56° | 71° | — | — |
| 2000 | 65° | 46° | 55° | — | — |
| 1999coldest | 58° | 41° | 49° | — | — |
| 1994 | 70° | 55° | 62° | 0.23" | — |
| 1993 | 77° | 50° | 64° | — | — |
| 1992 | 55° | 45° | 50° | 1.65" | — |
| 1991 | 56° | 46° | 51° | 2.69" | — |
| 1990 | 87° | 58° | 72° | — | — |
| 1989 | 85° | 48° | 66° | — | — |
| 1988 | 90° | 48° | 69° | — | — |
| 1987 | 67° | 38° | 52° | — | — |
| 1986 | 85° | 47° | 66° | — | — |
| 1985 | 75° | 39° | 57° | — | — |
| 1984 | 84° | 46° | 65° | — | — |
| 1983 | 63° | 44° | 53° | 1.52" | — |
| 1982 | 70° | 34° | 52° | — | — |
| 1981 | 62° | 45° | 53° | — | — |
| 1980 | 71° | 44° | 58° | — | — |
| 1979 | 60° | 44° | 52° | 0.2" | — |
| 1978 | 74° | 50° | 62° | — | — |
| 1977 | 69° | 46° | 58° | — | — |
| 1976 | 68° | 39° | 54° | — | — |
| 1975 | 75° | 44° | 60° | — | — |
| 1974 | 60° | 47° | 53° | — | — |
| 1973 | 66° | 46° | 56° | 2.21" | — |
| 1972 | 70° | 53° | 61° | — | — |
| 1971 | 79° | 39° | 59° | — | — |
52 years of data from POMONA/FAIRPLEX