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City of Portola, CAPortola, CA 7-Day Night Weather Forecast
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Portola, CA Weather Forecast
Portola, CA Weather Forecast Date: 231 AM PDT Thu Sep 17 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Today... Sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs 64 to 74. Light winds becoming west 10 to 15 mph in the afternoon.
Tonight... Clear. Lows 34 to 44. West winds around 10 mph in the evening becoming light.
Friday... Sunny. Highs 69 to 79. Light winds becoming north around 10 mph in the afternoon.
Friday Night... Clear. Lows 37 to 47. North winds around 10 mph in the evening becoming light.
Saturday... Sunny. Highs 73 to 83. Light winds becoming east around 10 mph in the afternoon.
Saturday Night... Clear. Lows 40 to 50.
Sunday... Partly cloudy. Highs 75 to 85. Lows 43 to 53.
Sunday Night... Partly cloudy. Highs 75 to 85. Lows 43 to 53.
Monday... Clear. Highs 78 to 88. Lows 42 to 52.
Tuesday... Clear. Highs 78 to 88. Lows 42 to 52.
POP = Probability of Precipitation
Portola Radar Loop
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