Weather on December 29
Ontario, CA
55 Years of Data
Avg High
64°F
Avg Low
42°F
Warmest
1980
67°F avg
Coldest
1971
39°F avg
About This Date
December 29th in Ontario, CA typically brings mild winter weather, with average highs around 64°F and lows near 42°F. Over 41 years of records, the warmest December 29th was in 1980 (67°F average), while the coldest was 1971 (39°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 29th dates historically, with the wettest December 29th recording 3.1" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 29th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 42° | 57° | — | — |
| 2024 | 69° | 43° | 56° | — | — |
| 2023 | 69° | 48° | 59° | — | — |
| 2022 | 56° | 52° | 54° | 0.03" | — |
| 2021 | 51° | 41° | 46° | 0.51" | — |
| 2020 | 61° | 38° | 49° | — | — |
| 2019 | 59° | 38° | 48° | — | — |
| 2018 | 61° | 33° | 47° | — | — |
| 2017 | 84° | 47° | 65° | — | — |
| 2016 | 79° | 41° | 60° | — | — |
| 2015 | 59° | 32° | 46° | — | — |
| 2014 | 61° | 36° | 48° | — | — |
| 2013 | 75° | 46° | 61° | — | — |
| 2012 | 53° | 38° | 45° | 0.25" | — |
| 2011 | 76° | 41° | 58° | — | — |
| 2010 | 52° | 42° | 47° | 1.57" | — |
| 2009 | 62° | 44° | 53° | — | — |
| 2008 | 73° | 40° | 56° | — | — |
| 2007 | 54° | 42° | 48° | — | — |
| 2006 | 68° | 39° | 54° | — | — |
| 2005 | 64° | 50° | 57° | — | — |
| 2004 | 57° | 48° | 53° | 3.1" | — |
| 2003 | 57° | 36° | 46° | — | — |
| 2002 | 57° | 43° | 50° | 0.05" | — |
| 2001 | 57° | 50° | 54° | 0.23" | — |
| 2000 | 79° | 42° | 60° | — | — |
| 1999 | 72° | 44° | 58° | — | — |
| 1998 | 78° | 43° | 60° | — | — |
| 1983 | 65° | 51° | 58° | — | — |
| 1982 | 57° | 42° | 50° | — | — |
| 1981 | 61° | 35° | 48° | — | — |
| 1980warmest | 85° | 49° | 67° | — | — |
| 1979 | 65° | 40° | 52° | — | — |
| 1978 | 60° | 41° | 51° | — | — |
| 1977 | 60° | 53° | 57° | 0.05" | — |
| 1976 | 61° | 35° | 48° | — | — |
| 1975 | 71° | 47° | 59° | — | — |
| 1974 | 55° | 37° | 46° | 1.42" | — |
| 1973 | 64° | 45° | 54° | — | — |
| 1972 | 56° | 31° | 43° | — | — |
| 1971coldest | 49° | 30° | 39° | — | — |
41 years of data from ONTARIO INTL AP