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Calpine, CA Weather Forecast
Calpine, CA Weather Forecast Date: 231 AM PDT Thu Sep 10 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Today... Mostly cloudy. Highs 82 to 92. Light winds becoming west 10 to 15 mph with gusts up to 30 mph in the afternoon.
Tonight... Partly cloudy in the evening then becoming clear. Lows 45 to 55. West winds around 10 mph with gusts up to 30 mph in the evening becoming light.
Friday... Sunny. Highs 80 to 90. West winds 10 to 15 mph. Gusts up to 30 mph in the afternoon.
Friday Night... Clear. Lows 43 to 53. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the evening.
Saturday... Sunny. Highs 71 to 81. South winds around 10 mph increasing to southwest 15 to 25 mph with gusts up to 45 mph in the afternoon.
Saturday Night... Breezy, clear. Lows 33 to 43.
Sunday... Clear. Highs 69 to 79. Lows 38 to 48.
Monday... Clear. Highs 69 to 79. Lows 38 to 48.
Tuesday... Clear. Highs 69 to 79. Lows 38 to 48.
POP = Probability of Precipitation
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