Weather on December 22
Ontario, CA
55 Years of Data
Avg High
64°F
Avg Low
43°F
Warmest
1999
63°F avg
Coldest
1998
41°F avg
About This Date
December 22nd in Ontario, CA typically brings mild winter weather, with average highs around 64°F and lows near 43°F. Over 41 years of records, the warmest December 22nd was in 1999 (63°F average), while the coldest was 1998 (41°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 22nd dates historically, with the wettest December 22nd recording 4.67" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for December 22nd in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 50° | 63° | — | — |
| 2024 | 67° | 49° | 58° | — | — |
| 2023 | 64° | 52° | 58° | 0.91" | — |
| 2022 | 69° | 41° | 55° | — | — |
| 2021 | 67° | 45° | 56° | — | — |
| 2020 | 72° | 47° | 59° | — | — |
| 2019 | 68° | 48° | 58° | — | — |
| 2018 | 72° | 44° | 58° | — | — |
| 2017 | 65° | 35° | 50° | — | — |
| 2016 | 57° | 50° | 54° | 1.02" | — |
| 2015 | 58° | 50° | 54° | 1.04" | — |
| 2014 | 77° | 47° | 62° | — | — |
| 2013 | 69° | 40° | 54° | — | — |
| 2012 | 61° | 37° | 49° | — | — |
| 2011 | 58° | 38° | 48° | — | — |
| 2010 | 61° | 50° | 55° | 4.67" | — |
| 2009 | 59° | 43° | 51° | 0.38" | — |
| 2008 | 51° | 43° | 47° | 0.08" | — |
| 2007 | 64° | 37° | 51° | — | — |
| 2006 | 63° | 41° | 52° | — | — |
| 2005 | 76° | 51° | 63° | — | — |
| 2004 | 63° | 41° | 52° | — | — |
| 2003 | 73° | 41° | 57° | — | — |
| 2002 | 58° | 45° | 51° | — | — |
| 2001 | 58° | 41° | 49° | — | — |
| 2000 | 69° | 39° | 54° | — | — |
| 1999warmest | 68° | 57° | 63° | — | — |
| 1998coldest | 54° | 28° | 41° | — | — |
| 1983 | 57° | 46° | 52° | — | — |
| 1982 | 58° | 43° | 50° | 2.64" | — |
| 1981 | 65° | 36° | 50° | — | — |
| 1980 | 74° | 43° | 58° | — | — |
| 1979 | 58° | 37° | 47° | — | — |
| 1978 | 67° | 40° | 53° | — | — |
| 1977 | 64° | 48° | 56° | 0.25" | — |
| 1976 | 67° | 38° | 52° | — | — |
| 1975 | 64° | 40° | 52° | — | — |
| 1974 | 60° | 36° | 48° | — | — |
| 1973 | 57° | 40° | 48° | — | — |
| 1972 | 67° | 45° | 56° | — | — |
| 1971 | 56° | 45° | 50° | 2.9" | — |
41 years of data from ONTARIO INTL AP