Weather WorldTwitchell Reservoir, CA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Twitchell Reservoir, CA Weather Forecast
Twitchell Reservoir, CA Weather Forecast Date: 231 PM PDT Wed Oct 28 2026
The area/counties/county of: Lassen, including the cities of: Portola, Susanville, Westwood, Sierraville, and Loyalton.or toggle through each period.
Tonight... Clear in the evening then becoming partly cloudy. Lows 24 to 34. Light winds.
Thursday... Mostly cloudy. Highs 56 to 61. Light winds becoming southwest around 10 mph in the afternoon.
Thursday Night... Mostly cloudy. Lows 26 to 36. Light winds.
Friday... Partly cloudy. Highs 51 to 61. Light winds becoming southwest around 10 mph in the afternoon.
Friday Night... Mostly cloudy. Lows 26 to 36. Southwest winds around 10 mph in the evening becoming light.
Saturday... Cloudy. Slight chance of rain and snow. Highs 45 to 55.
Saturday Night... Rain and snow likely. Lows 23 to 33.
Sunday... Mostly cloudy with a slight chance of rain and snow in the morning, then partly cloudy in the afternoon. Highs 45 to 55.
Sunday Night... Clear. Lows 20 to 30.
Monday... Partly cloudy. Highs 50 to 60. Lows 26 to 36.
Monday Night... Partly cloudy. Highs 50 to 60. Lows 26 to 36.
Tuesday... Mostly cloudy in the morning, then partly cloudy with a slight chance of rain in the afternoon. Highs 51 to 61.
Tuesday Night... Partly cloudy. Lows 25 to 35. Highs 57 to 62.
POP = Probability of Precipitation
Twitchell Reservoir Radar Loop
Use the map search tool if you want to place a location marker on the radar map...