Weather on April 20
Pomona, CA
55 Years of Data
Avg High
75°F
Avg Low
48°F
Warmest
2009
76°F avg
Coldest
1972
49°F avg
About This Date
April 20th in Pomona, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 48°F — a 27°F daily swing. Over 53 years of records, the warmest April 20th was in 2009 (76°F average), while the coldest was 1972 (49°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 20th dates historically, with the wettest April 20th recording 3.63" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for April 20th in Pomona, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 47° | 62° | — | — |
| 2024 | 71° | 48° | 60° | — | — |
| 2023 | 81° | 45° | 63° | — | — |
| 2022 | 67° | 46° | 56° | — | — |
| 2021 | 74° | 52° | 63° | — | — |
| 2020 | 60° | 49° | 54° | — | — |
| 2019 | 65° | 51° | 58° | — | — |
| 2018 | 75° | 43° | 59° | — | — |
| 2017 | 77° | 49° | 63° | — | — |
| 2016 | 86° | 56° | 71° | — | — |
| 2015 | 74° | 44° | 59° | — | — |
| 2014 | 82° | 51° | 67° | — | — |
| 2013 | 88° | 51° | 69° | — | — |
| 2012 | 96° | 55° | 76° | — | — |
| 2011 | 68° | 57° | 63° | — | — |
| 2010 | 63° | 44° | 53° | — | — |
| 2009warmest | 98° | 54° | 76° | — | — |
| 2008 | 67° | 49° | 58° | — | — |
| 2007 | 53° | 47° | 50° | 1.68" | — |
| 2006 | 84° | 49° | 66° | — | — |
| 2005 | 73° | 45° | 59° | — | — |
| 2004 | 73° | 47° | 60° | — | — |
| 2003 | 78° | 47° | 62° | — | — |
| 2002 | 67° | 43° | 55° | — | — |
| 2001 | 60° | 47° | 53° | 0.3" | — |
| 2000 | 79° | 47° | 63° | — | — |
| 1999 | 76° | 50° | 63° | — | — |
| 1998 | 91° | 46° | 69° | — | — |
| 1995 | 69° | 44° | 57° | — | — |
| 1994 | 82° | 51° | 67° | — | — |
| 1993 | 88° | 58° | 73° | — | — |
| 1992 | 78° | 47° | 62° | — | — |
| 1991 | 70° | 47° | 58° | — | — |
| 1990 | 81° | 56° | 68° | — | — |
| 1989 | 84° | 50° | 67° | — | — |
| 1988 | 53° | 49° | 51° | 3.63" | — |
| 1987 | 97° | 43° | 70° | — | — |
| 1986 | 90° | 46° | 68° | — | — |
| 1985 | 62° | 54° | 58° | — | — |
| 1984 | 72° | 43° | 57° | — | — |
| 1983 | 64° | 51° | 58° | 2.36" | — |
| 1982 | 89° | 51° | 70° | — | — |
| 1981 | 72° | 44° | 58° | — | — |
| 1980 | 80° | 46° | 63° | — | — |
| 1979 | 78° | 44° | 61° | — | — |
| 1978 | 75° | 45° | 60° | — | — |
| 1977 | 81° | 43° | 62° | — | — |
| 1976 | 80° | 51° | 66° | — | — |
| 1975 | 69° | 44° | 57° | — | — |
| 1974 | 68° | 42° | 55° | — | — |
| 1973 | 67° | 38° | 52° | — | — |
| 1972coldest | 58° | 40° | 49° | 0.25" | — |
| 1971 | 61° | 46° | 53° | — | — |
53 years of data from POMONA/FAIRPLEX