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Johnsville, CA Weather Forecast
Johnsville, CA Weather Forecast Date: 231 PM PDT Wed Sep 23 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Tonight... Clear. Lows 40 to 50. West winds around 10 mph in the evening becoming light.
Thursday... Sunny. Highs 78 to 88. Light winds becoming southwest 10 to 15 mph with gusts up to 30 mph in the afternoon.
Thursday Night... Partly cloudy in the evening then becoming mostly cloudy. Lows 43 to 53. Southwest winds 10 to 15 mph with gusts up to 35 mph.
Friday... Sunny. Highs 70 to 80. Southwest winds 10 to 15 mph. Gusts up to 40 mph in the afternoon.
Friday Night... Partly cloudy. Lows 33 to 43. West winds around 10 mph with gusts up to 30 mph in the evening becoming light.
Saturday... Partly cloudy. Highs 70 to 80.
Saturday Night... Partly cloudy in the evening then becoming mostly cloudy. Lows 37 to 47.
Sunday... Partly cloudy. Highs 66 to 76. Lows 31 to 41.
Sunday Night... Partly cloudy. Highs 66 to 76. Lows 31 to 41.
Monday... Clear. Highs 70 to 80. Lows 34 to 44.
Tuesday... Clear. Highs 70 to 80. Lows 34 to 44.
POP = Probability of Precipitation
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