Weather on December 17
Pomona, CA
55 Years of Data
Avg High
67°F
Avg Low
43°F
Warmest
2013
69°F avg
Coldest
2008
44°F avg
About This Date
December 17th in Pomona, CA typically brings mild winter weather, with average highs around 67°F and lows near 43°F. Over 52 years of records, the warmest December 17th was in 2013 (69°F average), while the coldest was 2008 (44°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 10% of December 17th dates historically, with the wettest December 17th recording 2.41" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Pomona, CA? Great weather for outdoor activities.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 52° | 62° | — | — |
| 2024 | 75° | 46° | 61° | — | — |
| 2023 | 76° | 51° | 63° | — | — |
| 2022 | 62° | 35° | 49° | — | — |
| 2021 | 62° | 39° | 51° | — | — |
| 2020 | 59° | 43° | 51° | — | — |
| 2019 | 65° | 37° | 51° | — | — |
| 2018 | 62° | 48° | 55° | — | — |
| 2017 | 69° | 46° | 58° | — | — |
| 2016 | 55° | 35° | 45° | — | — |
| 2015 | 65° | 37° | 51° | — | — |
| 2014 | 59° | 43° | 51° | — | — |
| 2013warmest | 82° | 55° | 69° | — | — |
| 2012 | 61° | 46° | 53° | — | — |
| 2011 | 61° | 48° | 54° | 0.03" | — |
| 2010 | 54° | 48° | 51° | 0.94" | — |
| 2009 | 73° | 42° | 58° | — | — |
| 2008coldest | 48° | 40° | 44° | 2.41" | — |
| 2007 | 59° | 37° | 48° | — | — |
| 2006 | 54° | 36° | 45° | — | — |
| 2005 | 59° | 36° | 47° | — | — |
| 2004 | 74° | 44° | 59° | — | — |
| 2003 | 71° | 39° | 55° | — | — |
| 2002 | 60° | 49° | 54° | — | — |
| 2001 | 63° | 34° | 48° | — | — |
| 2000 | 79° | 46° | 62° | — | — |
| 1999 | 79° | 49° | 64° | — | — |
| 1998 | 80° | 53° | 67° | — | — |
| 1994 | 75° | 37° | 56° | — | — |
| 1993 | 66° | 40° | 53° | — | — |
| 1992 | 65° | 36° | 50° | — | — |
| 1991 | 67° | 46° | 56° | — | — |
| 1990 | 62° | 32° | 47° | — | — |
| 1989 | 67° | 40° | 53° | — | — |
| 1988 | 58° | 40° | 49° | 0.25" | — |
| 1987 | 50° | 43° | 46° | 1.98" | — |
| 1986 | 72° | 40° | 56° | — | — |
| 1985 | 84° | 41° | 63° | — | — |
| 1984 | 57° | 34° | 45° | — | — |
| 1983 | 60° | 52° | 56° | — | — |
| 1982 | 73° | 39° | 56° | — | — |
| 1981 | 81° | 46° | 63° | — | — |
| 1980 | 79° | 51° | 65° | — | — |
| 1979 | 86° | 42° | 64° | — | — |
| 1978 | 55° | 47° | 51° | — | — |
| 1977 | 68° | 49° | 58° | — | — |
| 1976 | 79° | 42° | 60° | — | — |
| 1975 | 67° | 35° | 51° | — | — |
| 1974 | 79° | 46° | 62° | — | — |
| 1973 | 78° | 45° | 61° | — | — |
| 1972 | 70° | 47° | 58° | — | — |
| 1971 | 65° | 34° | 49° | — | — |
52 years of data from POMONA/FAIRPLEX