Weather on December 13
Ontario, CA
55 Years of Data
Avg High
65°F
Avg Low
42°F
Warmest
2010
64°F avg
Coldest
1975
43°F avg
About This Date
December 13th in Ontario, CA typically brings mild winter weather, with average highs around 65°F and lows near 42°F. Over 41 years of records, the warmest December 13th was in 2010 (64°F average), while the coldest was 1975 (43°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 12% of December 13th dates historically, with the wettest December 13th recording 1.47" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for December 13th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 49° | 62° | — | — |
| 2024 | 62° | 45° | 53° | — | — |
| 2023 | 71° | 45° | 58° | — | — |
| 2022 | 56° | 37° | 46° | — | — |
| 2021 | 55° | 41° | 48° | 0.03" | — |
| 2020 | 68° | 40° | 54° | — | — |
| 2019 | 74° | 50° | 62° | — | — |
| 2018 | 76° | 44° | 60° | — | — |
| 2017 | 83° | 46° | 64° | — | — |
| 2016 | 66° | 54° | 60° | — | — |
| 2015 | 65° | 36° | 50° | 0.56" | — |
| 2014 | 61° | 45° | 53° | — | — |
| 2013 | 66° | 40° | 53° | — | — |
| 2012 | 56° | 45° | 50° | 1.47" | — |
| 2011 | 57° | 41° | 49° | — | — |
| 2010warmest | 80° | 49° | 64° | — | — |
| 2009 | 59° | 50° | 55° | 0.25" | — |
| 2008 | 58° | 42° | 50° | — | — |
| 2007 | 62° | 39° | 51° | — | — |
| 2006 | 73° | 45° | 59° | — | — |
| 2005 | 65° | 42° | 53° | — | — |
| 2004 | 69° | 49° | 59° | — | — |
| 2003 | 63° | 39° | 51° | — | — |
| 2002 | 66° | 44° | 55° | — | — |
| 2001 | 62° | 37° | 50° | — | — |
| 2000 | 59° | 37° | 48° | — | — |
| 1999 | 62° | 38° | 50° | — | — |
| 1998 | 80° | 41° | 61° | — | — |
| 1983 | 60° | 39° | 50° | — | — |
| 1982 | 70° | 44° | 57° | — | — |
| 1981 | 59° | 49° | 54° | — | — |
| 1980 | 69° | 38° | 53° | — | — |
| 1979 | 73° | 39° | 56° | — | — |
| 1978 | 73° | 41° | 57° | — | — |
| 1977 | 75° | 42° | 59° | — | — |
| 1976 | 74° | 42° | 58° | — | — |
| 1975coldest | 50° | 36° | 43° | — | — |
| 1974 | 65° | 40° | 52° | — | — |
| 1973 | 57° | 39° | 48° | — | — |
| 1972 | 54° | 34° | 44° | — | — |
| 1971 | 53° | 39° | 46° | 0.86" | — |
41 years of data from ONTARIO INTL AP