Exercise normal precautions
United States · California · December
California in Decemberhow the month reads
December is a challenging month for California overall inside United States, with cooler than the yearly mean by 9.5°C. The safety bulletins below apply.
- Rank
- 12 of 12
- Score
- 60/100
December match
60/100
Free-tier default preferences.
What’s open · December
Things to do in California in December
- ClosedGlacier Point Road, Yosemite
closed for the winter beyond the Badger Pass ski area; it shuts between late October and mid-November and reopens between late May and early June
Source: nps.gov
- Closed
Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.
- Temperature13°C−9.5°C vs. yearly mean
- Month rank12 of 12for California
- Best monthsMay · September · Octoberhighest regional score
12-month temperature · California
December in context
View data table
| Month | Average daytime high (°C) |
|---|---|
| January | 12.5 |
| February | 14.2 |
| March | 15.9 |
| April | 20.7 |
| May | 24.4 |
| June | 30.0 |
| July | 33.3 |
| August | 32.6 |
| September | 29.3 |
| October | 23.9 |
| November | 17.1 |
| December | 12.7 |
Safety · 4 governments
What the governments say about United States
Combined advisory · most-cautious-wins
Exercise normal precautions
Highest level across 4 governments · Advisory last changed
See breakdown by countryHide breakdown
AU
Level 1Exercise normal precautions
CA
Level 1Exercise normal precautions
Exercise normal precautions
DE
Level 1Exercise normal precautions
Exercise normal precautions
NL
Level 1Exercise normal precautions
Exercise normal precautions
Start free
Plan a December trip to California.
No card required. Upgrade to Premium whenever you want more depth.