Weather WorldBig Valley High School, CA 7-Day Night Weather Forecast
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Big Valley High School, CA Weather Forecast
Big Valley High School, CA Weather Forecast Date: 231 AM PDT Thu Aug 20 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Today... Partly cloudy. Highs 87 to 97. Light winds becoming southwest around 10 mph in the afternoon.
Tonight... Mostly cloudy in the evening then becoming partly cloudy. Lows 48 to 58. West winds around 10 mph in the evening becoming light.
Friday... Mostly cloudy. Highs 85 to 95. Light winds becoming southwest 10 to 15 mph with gusts up to 30 mph in the afternoon.
Friday Night... Mostly cloudy in the evening then becoming partly cloudy. Lows 47 to 57. Southwest winds around 10 mph with gusts up to 30 mph in the evening becoming light.
Saturday... Sunny. Highs 83 to 93. Light winds becoming southwest 10 to 15 mph with gusts up to 35 mph in the afternoon.
Saturday Night... Clear. Lows 41 to 51.
Sunday... Sunny. Highs 83 to 93.
Sunday Night... Partly cloudy. Lows 44 to 54. Highs 82 to 92.
Monday... Partly cloudy. Lows 44 to 54. Highs 82 to 92.
Monday Night... Clear. Lows 44 to 54. Highs 82 to 92.
Tuesday... Clear. Lows 44 to 54. Highs 82 to 92.
Tuesday Night... Clear in the evening then becoming partly cloudy. Lows 43 to 53.
POP = Probability of Precipitation
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