Weather on December 20 at Pinnacles
Pinnacles National Park
Based on 55 years of data from Salinas, CA
Elevation Note: Pinnacles sits at 2,000 ft. Expect temperatures 7°F cooler than the data shown below, which comes from Salinas, CA at a lower elevation.
Planning Your Visit
December 20th in Pinnacles National Park (via Salinas, CA) typically brings mild winter weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest December 20th was in 2025 (61°F average), while the coldest was 1990 (41°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 27% of December 20th dates historically, with the wettest December 20th recording 1.75" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Pinnacles? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 68°F | 53°F | 0" | -- |
| 2024 | 68°F | 45°F | 0" | -- |
| 2023 | 58°F | 51°F | 1.4" | -- |
| 2022 | 62°F | 41°F | 0" | -- |
| 2021 | 55°F | 36°F | 0" | -- |
| 2020 | 70°F | 35°F | 0" | -- |
| 2019 | 63°F | 46°F | 0" | -- |
| 2018 | 62°F | 47°F | 0" | -- |
| 2017 | 57°F | 47°F | 0.18" | -- |
| 2016 | 67°F | 35°F | 0" | -- |
| 2015 | 55°F | 35°F | 0" | -- |
| 2014 | 64°F | 54°F | 0.66" | -- |
| 2013 | 62°F | 30°F | 0" | -- |
| 2012 | 62°F | 32°F | 0" | -- |
| 2011 | 64°F | 33°F | -- | -- |
| 2010 | 52°F | 46°F | 0.66" | -- |
| 2009 | 70°F | 43°F | 0" | 0" |
| 2008 | 56°F | 31°F | 0" | 0" |
| 2007 | 56°F | 47°F | 0.61" | 0" |
| 2006 | 60°F | 32°F | 0" | 0" |
| 2005 | 67°F | 47°F | 0" | 0" |
| 2004 | 62°F | 34°F | 0" | 0" |
| 2003 | 62°F | 52°F | 1.75" | 0" |
| 2002 | 62°F | 44°F | 1.12" | 0" |
| 2001 | 55°F | 46°F | 0.86" | 0" |
| 2000 | 69°F | 38°F | 0" | 0" |
| 1999 | 74°F | 44°F | 0" | 0" |
| 1998 | 49°F | 38°F | 0.3" | -- |
| 1997 | 62°F | 35°F | 0.03" | 0" |
| 1996 | 56°F | 38°F | 0" | 0" |
| 1995 | 62°F | 39°F | 0" | 0" |
| 1994 | 68°F | 44°F | 0" | 0" |
| 1993 | 63°F | 38°F | 0" | 0" |
| 1992 | 60°F | 35°F | 0" | 0" |
| 1991 | 62°F | 32°F | 0" | 0" |
| 1990 | 47°F | 35°F | 0" | 0" |
| 1989 | 63°F | 35°F | 0" | 0" |
| 1988 | 54°F | 44°F | 0.84" | 0" |
| 1987 | 64°F | 39°F | 0" | 0" |
| 1986 | 61°F | 41°F | 0.38" | 0" |
| 1985 | 76°F | 44°F | 0" | 0" |
| 1984 | 56°F | 43°F | 0" | 0" |
| 1983 | 58°F | 44°F | 0" | 0" |
| 1982 | 58°F | 48°F | 0.13" | 0" |
| 1981 | 64°F | 55°F | 0" | 0" |
| 1980 | 68°F | 42°F | 0" | 0" |
| 1979 | 57°F | 42°F | 0.1" | 0" |
| 1978 | 54°F | 34°F | 0" | 0" |
| 1977 | 65°F | 33°F | 0" | 0" |
| 1976 | 67°F | 35°F | 0" | 0" |
| 1975 | 54°F | 32°F | 0" | 0" |
| 1974 | 68°F | 37°F | 0" | 0" |
| 1973 | 65°F | 45°F | 0" | 0" |
| 1972 | 63°F | 50°F | 0.03" | 0" |
| 1971 | 59°F | 31°F | 0" | 0" |