Weather on December 9
Pomona, CA
55 Years of Data
Avg High
68°F
Avg Low
43°F
Warmest
1975
68°F avg
Coldest
1972
41°F avg
About This Date
December 9th in Pomona, CA typically brings mild winter weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 52 years of records, the warmest December 9th was in 1975 (68°F average), while the coldest was 1972 (41°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 6% of December 9th dates historically, with the wettest December 9th recording 1.07" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Pomona, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 52° | 66° | — | — |
| 2024 | 67° | 40° | 53° | — | — |
| 2023 | 69° | 43° | 56° | — | — |
| 2022 | 60° | 37° | 49° | — | — |
| 2021 | 51° | 47° | 49° | — | — |
| 2020 | 74° | 46° | 60° | — | — |
| 2019 | 63° | 45° | 54° | — | — |
| 2018 | 68° | 46° | 57° | — | — |
| 2017 | 80° | 51° | 66° | — | — |
| 2016 | 64° | 45° | 54° | — | — |
| 2015 | 78° | 54° | 66° | — | — |
| 2014 | 79° | 49° | 64° | — | — |
| 2013 | 57° | 32° | 45° | — | — |
| 2012 | 69° | 42° | 56° | — | — |
| 2011 | 69° | 40° | 54° | — | — |
| 2010 | 70° | 44° | 57° | — | — |
| 2009 | 56° | 33° | 44° | — | — |
| 2008 | 65° | 44° | 54° | — | — |
| 2007 | 61° | 42° | 51° | — | — |
| 2006 | 83° | 52° | 67° | 0.76" | — |
| 2005 | 73° | 47° | 60° | 1.07" | — |
| 2004 | 67° | 46° | 56° | — | — |
| 2003 | 69° | 40° | 54° | — | — |
| 2002 | 70° | 46° | 58° | — | — |
| 2001 | 51° | 50° | 51° | — | — |
| 2000 | 62° | 49° | 55° | — | — |
| 1999 | 63° | 42° | 52° | — | — |
| 1998 | 62° | 39° | 51° | — | — |
| 1994 | 70° | 34° | 52° | — | — |
| 1993 | 69° | 44° | 57° | — | — |
| 1992 | 64° | 45° | 54° | — | — |
| 1991 | 65° | 53° | 59° | — | — |
| 1990 | 82° | 45° | 63° | — | — |
| 1989 | 76° | 45° | 60° | — | — |
| 1988 | 75° | 42° | 59° | — | — |
| 1987 | 69° | 41° | 55° | — | — |
| 1986 | 67° | 41° | 54° | — | — |
| 1985 | 65° | 34° | 49° | — | — |
| 1984 | 70° | 44° | 57° | — | — |
| 1983 | 61° | 42° | 51° | 0.84" | — |
| 1982 | 65° | 49° | 57° | — | — |
| 1981 | 80° | 49° | 64° | — | — |
| 1980 | 67° | 37° | 52° | — | — |
| 1979 | 75° | 46° | 61° | — | — |
| 1978 | 61° | 30° | 45° | — | — |
| 1977 | 66° | 43° | 54° | — | — |
| 1976 | 78° | 38° | 58° | — | — |
| 1975warmest | 84° | 51° | 68° | — | — |
| 1974 | 71° | 36° | 53° | — | — |
| 1973 | 83° | 49° | 66° | — | — |
| 1972coldest | 51° | 31° | 41° | — | — |
| 1971 | 58° | 34° | 46° | — | — |
52 years of data from POMONA/FAIRPLEX