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Off Stream Reservoir, CA Weather Forecast
Off Stream Reservoir, CA Weather Forecast Date: 231 PM PST Mon Nov 02 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Tonight... Mostly cloudy. Lows 26 to 36. Southeast winds 10 to 15 mph.
Tuesday... Mostly cloudy. Chance of rain and snow in the afternoon. Snow level 6000 to 6500 feet. Highs 49 to 59. South winds 10 to 15 mph.
Tuesday Night... Mostly cloudy with a slight chance of rain in the evening, then partly cloudy after midnight. Lows 24 to 34. Light winds.
Wednesday... Mostly cloudy in the morning then clearing. Highs 49 to 59. Light winds.
Wednesday Night... Partly cloudy. Lows 23 to 33. Light winds.
Thursday... Partly cloudy in the morning then clearing. Highs 53 to 63.
Thursday Night... Clear. Lows 25 to 35.
Friday... Partly cloudy. Highs 55 to 65.
Friday Night... Clear. Lows 27 to 37. Highs 58 to 68.
Saturday... Clear. Lows 27 to 37. Highs 58 to 68.
Sunday... Partly cloudy. Highs 58 to 68. Lows 29 to 39.
Sunday Night... Partly cloudy. Highs 58 to 68. Lows 29 to 39.
POP = Probability of Precipitation
Off Stream Reservoir Radar Loop
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