January weather forecast and climate
California, USA

Flag of California, USA
Flag of California, USA

Weather in January

January is the coldest month of the year in California with the mountains of the Sierra Nevada in the frigid 3°F (-16.1°C) to 15°F (-9.4°C) average range amid snowy alpine conditions. The state has the widest variety of pine trees in the world that makes spectacular scenery in the backdrop of the snow!
Elsewhere in the state, however, the cold is more manageable with day temperatures of 54°F (12.2°C) to 70°F (21.1°C) and nights in the range of 30°F (-1.1°C) to 45°F (7.2°C). Sacramento in the central part of the state experiences cold weather with average temperatures in the 39°F (3.9°C) to 54°F (12.2°C), while San Diego in the south is mild between 49°F (9.4°C) to 65°F (18.3°C).
Rainfall occurs almost everywhere in the state in January to the tune of an average 3" (76mm). Expect the sunshine to last only for 6 hours a day with plenty of cloud cover and damp conditions during January.
Although New Year draws crowds to California, it is worth to wait for the upcoming pleasant weather of spring.
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