Weather on December 14
Rancho Cucamonga, CA
55 Years of Data
Avg High
66°F
Avg Low
42°F
Warmest
2025
64°F avg
Coldest
1971
44°F avg
About This Date
December 14th in Rancho Cucamonga, CA typically brings mild winter weather, with average highs around 66°F and lows near 42°F. Over 41 years of records, the warmest December 14th was in 2025 (64°F average), while the coldest was 1971 (44°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 17% of December 14th dates historically, with the wettest December 14th recording 5.18" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for December 14th in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 77° | 50° | 64° | — | — |
| 2024 | 67° | 44° | 55° | — | — |
| 2023 | 74° | 42° | 58° | — | — |
| 2022 | 60° | 37° | 49° | — | — |
| 2021 | 56° | 40° | 48° | 5.18" | — |
| 2020 | 64° | 46° | 55° | — | — |
| 2019 | 60° | 51° | 56° | 0.08" | — |
| 2018 | 67° | 46° | 56° | — | — |
| 2017 | 82° | 43° | 62° | — | — |
| 2016 | 72° | 49° | 60° | — | — |
| 2015 | 59° | 40° | 49° | — | — |
| 2014 | 63° | 42° | 52° | — | — |
| 2013 | 75° | 42° | 59° | — | — |
| 2012 | 55° | 43° | 49° | 0.13" | — |
| 2011 | 58° | 38° | 48° | — | — |
| 2010 | 70° | 47° | 58° | — | — |
| 2009 | 61° | 47° | 54° | — | — |
| 2008 | 54° | 36° | 45° | 0.03" | — |
| 2007 | 62° | 35° | 49° | — | — |
| 2006 | 78° | 48° | 63° | — | — |
| 2005 | 66° | 40° | 53° | — | — |
| 2004 | 77° | 45° | 61° | — | — |
| 2003 | 57° | 35° | 46° | 0.03" | — |
| 2002 | 65° | 48° | 56° | — | — |
| 2001 | 48° | 39° | 44° | 0.76" | — |
| 2000 | 57° | 45° | 51° | — | — |
| 1999 | 67° | 37° | 52° | — | — |
| 1998 | 62° | 38° | 50° | — | — |
| 1983 | 73° | 38° | 55° | — | — |
| 1982 | 73° | 40° | 56° | — | — |
| 1981 | 75° | 41° | 58° | — | — |
| 1980 | 75° | 44° | 60° | — | — |
| 1979 | 74° | 43° | 58° | — | — |
| 1978 | 73° | 40° | 56° | — | — |
| 1977 | 76° | 46° | 61° | — | — |
| 1976 | 73° | 45° | 59° | — | — |
| 1975 | 54° | 34° | 44° | 0.1" | — |
| 1974 | 67° | 41° | 54° | — | — |
| 1973 | 58° | 47° | 52° | — | — |
| 1972 | 58° | 31° | 44° | — | — |
| 1971coldest | 55° | 32° | 44° | — | — |
41 years of data from ONTARIO INTL AP