Weather on December 6
Ontario, CA
55 Years of Data
Avg High
68°F
Avg Low
43°F
Warmest
1979
68°F avg
Coldest
1978
40°F avg
About This Date
December 6th in Ontario, CA typically brings mild winter weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 41 years of records, the warmest December 6th was in 1979 (68°F average), while the coldest was 1978 (40°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 12% of December 6th dates historically, with the wettest December 6th recording 4.01" of rain. The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for December 6th 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 | 72° | 41° | 56° | — | — |
| 2024 | 82° | 46° | 64° | — | — |
| 2023 | 78° | 51° | 65° | — | — |
| 2022 | 59° | 45° | 52° | — | — |
| 2021 | 74° | 42° | 58° | — | — |
| 2020 | 77° | 39° | 58° | — | — |
| 2019 | 69° | 49° | 59° | 0.33" | — |
| 2018 | 54° | 49° | 51° | 4.01" | — |
| 2017 | 79° | 50° | 64° | — | — |
| 2016 | 61° | 49° | 55° | — | — |
| 2015 | 77° | 44° | 61° | — | — |
| 2014 | 71° | 53° | 62° | — | — |
| 2013 | 56° | 43° | 49° | — | — |
| 2012 | 66° | 53° | 60° | — | — |
| 2011 | 62° | 32° | 47° | — | — |
| 2010 | 67° | 47° | 57° | 0.84" | — |
| 2009 | 55° | 45° | 50° | — | — |
| 2008 | 77° | 43° | 60° | — | — |
| 2007 | 65° | 48° | 56° | 0.28" | — |
| 2006 | 79° | 38° | 58° | — | — |
| 2005 | 73° | 36° | 54° | — | — |
| 2004 | 54° | 38° | 46° | — | — |
| 2003 | 71° | 42° | 57° | — | — |
| 2002 | 71° | 44° | 58° | — | — |
| 2001 | 71° | 41° | 56° | — | — |
| 2000 | 72° | 52° | 62° | — | — |
| 1999 | 69° | 36° | 52° | — | — |
| 1998 | 56° | 36° | 46° | 0.56" | — |
| 1983 | 66° | 31° | 48° | — | — |
| 1982 | 72° | 43° | 57° | — | — |
| 1981 | 73° | 41° | 57° | — | — |
| 1980 | 58° | 46° | 52° | — | — |
| 1979warmest | 83° | 53° | 68° | — | — |
| 1978coldest | 50° | 31° | 40° | — | — |
| 1977 | 80° | 51° | 66° | — | — |
| 1976 | 70° | 43° | 56° | — | — |
| 1975 | 74° | 40° | 57° | — | — |
| 1974 | 66° | 38° | 52° | — | — |
| 1973 | 72° | 40° | 56° | — | — |
| 1972 | 51° | 32° | 42° | — | — |
| 1971 | 61° | 36° | 48° | — | — |
41 years of data from ONTARIO INTL AP