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Grass Valley Lake, CA 7-Day Night Weather Forecast
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Grass Valley Lake, CA Weather Forecast
Grass Valley Lake, CA Weather Forecast Date: 147 PM PDT Sat Aug 22 2026
The area/counties/county of: San Bernardino County Mountains, including the cities of: Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, and Wrightwood.or toggle through each period.
Tonight... Mostly clear. Cooler. Lows 53 to 63 above 6000 feet to 62 to 72 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 30 mph...Becoming 25 mph overnight.
Sunday... Sunny. Highs 77 to 87 above 6000 feet to 87 to 97 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 25 mph... Becoming 30 mph in the afternoon.
Sunday Night... Mostly clear in the evening...Becoming partly cloudy. Lows 53 to 63 above 6000 feet to 62 to 72 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 30 mph... Becoming 25 mph overnight.
Monday... Mostly sunny. Highs 76 to 86 above 6000 feet to 86 to 95 below 6000 feet. Areas of winds southwest 10 to 15 mph. Gusts to 25 mph in the afternoon.
Monday Night... Mostly clear. Lows 52 to 62 above 6000 feet to 62 to 72 below 6000 feet. Areas of winds west 10 mph in the evening becoming light.
Tuesday... Mostly sunny. Highs 78 to 88 above 6000 feet to 88 to 98 below 6000 feet.
Tuesday Night... Mostly clear. Lows 58 to 68.
Wednesday... Mostly sunny. Highs 81 to 91 above 6000 feet to 90 to 100 below 6000 feet.
Wednesday Night... Mostly clear. Lows 58 to 68.
Thursday... Mostly sunny. Highs 81 to 91 above 6000 feet to 91 to 100 below 6000 feet.
Thursday Night... Partly cloudy. Lows 58 to 68.
Friday... Partly cloudy in the morning...Becoming mostly sunny. Highs 81 to 91 above 6000 feet to 90 to 100 below 6000 feet.
Friday Night... Mostly clear. Lows 58 to 68.
POP = Probability of Precipitation
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