The John Muir Trail in California's Sierra Nevada has varied weather in January. It is usually cold, with daytime temperatures between the low 30s and mid-40s °F. At night, it can drop to between the mid-teens and upper 20s °F.
You will find many sunny days, especially in the south. But you might also see some partly cloudy days. Snow is common, especially in higher areas, and can range from moderate to heavy. Sometimes, there might be light freezing rain.
Rainfall varies a lot. Some areas might get as little as 0.03 inches per day, while others can get up to 0.62 inches.
So, be ready for cold weather with lots of sun, some snow, and occasional clouds during your winter walk in California's high mountains.
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