Weather on October 21
Pomona, CA
55 Years of Data
Avg High
79°F
Avg Low
54°F
Warmest
2003
83°F avg
Coldest
1972
56°F avg
About This Date
October 21st in Pomona, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 54°F — a 25°F daily swing. Over 52 years of records, the warmest October 21st was in 2003 (83°F average), while the coldest was 1972 (56°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 10% of October 21st dates historically, with the wettest October 21st recording 0.58" of rain. The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Pomona, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 58° | 73° | — | — |
| 2024 | 85° | 58° | 71° | — | — |
| 2023 | 85° | 60° | 72° | — | — |
| 2022 | 79° | 59° | 69° | — | — |
| 2021 | 80° | 51° | 66° | — | — |
| 2020 | 75° | 52° | 63° | — | — |
| 2019 | 90° | 60° | 75° | — | — |
| 2018 | 79° | 58° | 68° | — | — |
| 2017 | 77° | 51° | 64° | — | — |
| 2016 | 92° | 61° | 76° | — | — |
| 2015 | 83° | 55° | 69° | — | — |
| 2014 | 80° | 53° | 67° | — | — |
| 2013 | 82° | 52° | 67° | — | — |
| 2012 | 68° | 58° | 63° | — | — |
| 2011 | 75° | 57° | 66° | — | — |
| 2010 | 61° | 58° | 59° | 0.58" | — |
| 2009 | 74° | 53° | 63° | — | — |
| 2008 | 89° | 53° | 71° | — | — |
| 2007 | 83° | 52° | 67° | — | — |
| 2006 | 90° | 57° | 73° | — | — |
| 2005 | 76° | 56° | 66° | — | — |
| 2004 | 67° | 49° | 58° | — | — |
| 2003warmest | 104° | 62° | 83° | — | — |
| 2002 | 74° | 51° | 62° | — | — |
| 2001 | 73° | 53° | 63° | — | — |
| 2000 | 65° | 54° | 59° | — | — |
| 1999 | 96° | 44° | 70° | — | — |
| 1998 | 78° | 55° | 67° | — | — |
| 1994 | 80° | 45° | 62° | — | — |
| 1993 | 87° | 56° | 71° | — | — |
| 1992 | 66° | 59° | 63° | — | — |
| 1991 | 73° | 62° | 68° | 0.2" | — |
| 1990 | 88° | 45° | 66° | — | — |
| 1989 | 70° | 55° | 62° | — | — |
| 1988 | 81° | 61° | 71° | — | — |
| 1987 | 77° | 50° | 64° | — | — |
| 1986 | 85° | 50° | 67° | — | — |
| 1985 | 67° | 57° | 62° | — | — |
| 1984 | 73° | 45° | 59° | — | — |
| 1983 | 87° | 54° | 70° | — | — |
| 1982 | 82° | 53° | 68° | — | — |
| 1981 | 81° | 51° | 66° | — | — |
| 1980 | 89° | 57° | 73° | — | — |
| 1979 | 66° | 47° | 56° | 0.2" | — |
| 1978 | 74° | 56° | 65° | 0.13" | — |
| 1977 | 66° | 55° | 61° | — | — |
| 1976 | 78° | 61° | 69° | 0.08" | — |
| 1975 | 74° | 50° | 62° | — | — |
| 1974 | 72° | 55° | 63° | — | — |
| 1973 | 80° | 55° | 68° | — | — |
| 1972coldest | 63° | 49° | 56° | — | — |
| 1971 | 83° | 44° | 63° | — | — |
52 years of data from POMONA/FAIRPLEX