Weather on December 8
Rancho Cucamonga, CA
55 Years of Data
Avg High
68°F
Avg Low
44°F
Warmest
2020
68°F avg
Coldest
1978
39°F avg
About This Date
December 8th in Rancho Cucamonga, CA typically brings mild winter weather, with average highs around 68°F and lows near 44°F. Over 41 years of records, the warmest December 8th was in 2020 (68°F average), while the coldest was 1978 (39°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 10% of December 8th dates historically, with the wettest December 8th recording 0.61" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for December 8th in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 47° | 65° | — | — |
| 2024 | 73° | 45° | 59° | — | — |
| 2023 | 66° | 44° | 55° | — | — |
| 2022 | 62° | 40° | 51° | — | — |
| 2021 | 66° | 45° | 55° | — | — |
| 2020warmest | 81° | 56° | 68° | — | — |
| 2019 | 63° | 53° | 58° | 0.18" | — |
| 2018 | 71° | 43° | 57° | — | — |
| 2017 | 83° | 50° | 66° | — | — |
| 2016 | 66° | 45° | 55° | — | — |
| 2015 | 83° | 48° | 65° | — | — |
| 2014 | 78° | 51° | 65° | — | — |
| 2013 | 54° | 36° | 45° | — | — |
| 2012 | 69° | 43° | 56° | — | — |
| 2011 | 68° | 36° | 52° | — | — |
| 2010 | 76° | 42° | 59° | — | — |
| 2009 | 51° | 34° | 42° | — | — |
| 2008 | 60° | 51° | 56° | — | — |
| 2007 | 55° | 45° | 50° | 0.18" | — |
| 2006 | 77° | 47° | 62° | — | — |
| 2005 | 68° | 49° | 58° | — | — |
| 2004 | 60° | 48° | 54° | 0.25" | — |
| 2003 | 66° | 48° | 57° | — | — |
| 2002 | 72° | 43° | 57° | — | — |
| 2001 | 79° | 45° | 62° | — | — |
| 2000 | 58° | 51° | 54° | — | — |
| 1999 | 67° | 40° | 53° | — | — |
| 1998 | 62° | 33° | 48° | — | — |
| 1983 | 75° | 38° | 56° | — | — |
| 1982 | 59° | 41° | 50° | — | — |
| 1981 | 82° | 44° | 63° | — | — |
| 1980 | 61° | 48° | 54° | — | — |
| 1979 | 78° | 51° | 65° | — | — |
| 1978coldest | 51° | 27° | 39° | — | — |
| 1977 | 68° | 38° | 53° | — | — |
| 1976 | 75° | 43° | 59° | — | — |
| 1975 | 83° | 48° | 65° | — | — |
| 1974 | 65° | 40° | 52° | — | — |
| 1973 | 77° | 45° | 61° | — | — |
| 1972 | 48° | 39° | 44° | 0.61" | — |
| 1971 | 55° | 32° | 44° | — | — |
41 years of data from ONTARIO INTL AP