Weather on December 18 at Yosemite
Yosemite National Park
Based on 41 years of data from Mariposa, CA
Elevation Note: Yosemite sits at 4,000 ft. Expect temperatures 14°F cooler than the data shown below, which comes from Mariposa, CA at a lower elevation.
Planning Your Visit
December 18th in Yosemite National Park (via Mariposa, CA) typically brings cool winter weather, with average highs around 55°F and lows near 35°F. Over 41 years of records, the warmest December 18th was in 2013 (58°F average), while the coldest was 1992 (33°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 5% of December 18th dates historically, with the wettest December 18th recording 1.52" of rain. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for December 18th in Yosemite? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 62°F | 41°F | -- | -- |
| 2024 | 60°F | 35°F | -- | -- |
| 2023 | 56°F | 49°F | -- | -- |
| 2022 | 55°F | 30°F | -- | -- |
| 2021 | 55°F | 34°F | -- | -- |
| 2020 | 54°F | 33°F | -- | -- |
| 2019 | 55°F | 37°F | -- | -- |
| 2018 | 56°F | 38°F | -- | -- |
| 2017 | 64°F | 36°F | -- | -- |
| 2016 | 48°F | 27°F | -- | -- |
| 2015 | 59°F | 31°F | -- | -- |
| 2014 | 55°F | 37°F | -- | -- |
| 2013 | 71°F | 45°F | -- | -- |
| 2012 | 45°F | 32°F | -- | -- |
| 2011 | 59°F | 31°F | -- | -- |
| 2010 | 52°F | 44°F | -- | -- |
| 2009 | 44°F | 32°F | -- | -- |
| 2008 | 44°F | 25°F | -- | -- |
| 2007 | 47°F | 42°F | -- | -- |
| 2006 | 47°F | 26°F | -- | -- |
| 2005 | 50°F | 43°F | -- | -- |
| 2004 | 70°F | 36°F | -- | -- |
| 2003 | 73°F | 40°F | -- | -- |
| 2002 | 51°F | 31°F | -- | -- |
| 2001 | 57°F | 35°F | -- | -- |
| 2000 | 67°F | 34°F | -- | -- |
| 1999 | 60°F | 36°F | -- | -- |
| 1998 | 67°F | 37°F | -- | -- |
| 1997 | 44°F | 34°F | -- | -- |
| 1995 | 50°F | 33°F | -- | -- |
| 1994 | 58°F | 37°F | -- | -- |
| 1993 | 47°F | 35°F | -- | -- |
| 1992 | 43°F | 24°F | -- | -- |
| 1991 | 53°F | 39°F | -- | -- |
| 1990 | 47°F | 25°F | -- | -- |
| 1976 | 69°F | 32°F | 0" | 0" |
| 1975 | 59°F | 29°F | 0" | 0" |
| 1974 | 49°F | 40°F | 0" | 0" |
| 1973 | 55°F | 34°F | 0.18" | 0" |
| 1972 | 54°F | 43°F | 1.52" | 0" |
| 1971 | 55°F | 30°F | 0" | 0" |