Weather WorldGem Lake, CA 7-Day Night Weather Forecast
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Gem Lake, CA Weather Forecast
Gem Lake, CA Weather Forecast Date: 231 PM PDT Sun Oct 11 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Tonight... Partly cloudy. Lows 21 to 31. North winds 10 to 15 mph with gusts up to 35 mph.
Columbus Day... Partly cloudy in the morning then becoming sunny. Highs 48 to 58. Light winds becoming northwest around 10 mph in the afternoon.
Monday Night... Clear. Lows 18 to 28. North winds around 10 mph in the evening becoming light.
Tuesday... Sunny. Highs 56 to 66. Light winds.
Tuesday Night... Clear. Lows 24 to 34. Light winds.
Wednesday... Sunny. Highs 62 to 72.
Wednesday Night... Clear. Lows 28 to 38.
Thursday... Clear. Highs 68 to 78. Lows 32 to 42.
Friday... Clear. Highs 68 to 78. Lows 32 to 42.
Saturday... Clear. Highs 68 to 78. Lows 32 to 42.
POP = Probability of Precipitation
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