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Flat Lake, WA Weather Forecast
Flat Lake, WA Weather Forecast Date: 207 AM PDT Sat Sep 12 2026
The area/counties/county of: Moses Lake Area, including the cities of: Moses Lake, Ephrata, Othello, Quincy, Ritzville, Grand Coulee, Odessa, Wilbur, and Coulee City.or toggle through each period.
Today... Mostly cloudy. Highs in the mid 70s to lower 80s. Northeast wind 5 to 15 mph with gusts up to 30 mph.
Tonight... A chance of rain in the evening, then rain and a chance of thunderstorms overnight. Lows in the upper 40s to mid 50s. North wind 5 to 15 mph with gusts up to 30 mph. Chance of precipitation near 100%. Rainfall amounts up to a half inch possible, except higher amounts possible in thunderstorms.
Sunday... Rain. Much cooler. Highs in the upper 50s to lower 60s. Breezy. South wind 10 to 20 mph with gusts up to 35 mph. Chance of precipitation near 100%. Rainfall amounts up to three quarters of an inch possible.
Sunday Night... Mostly cloudy with a 50% chance of rain. Lows in the mid to upper 40s. Southwest wind 5 to 15 mph with gusts up to 25 mph.
Monday... Sunny, warmer. Highs in the mid to upper 60s. South wind 5 to 10 mph.
Monday Night... Mostly cloudy. Lows in the mid 40s.
Tuesday... Mostly cloudy. Highs around 70.
Tuesday Night... Mostly clear. Lows in the mid 40s to lower 50s. Highs in the lower 70s to lower 80s.
Wednesday... Mostly clear. Lows in the mid 40s to lower 50s. Highs in the lower 70s to lower 80s.
Thursday... Mostly clear. Lows in the mid 40s to lower 50s. Highs in the lower 70s to lower 80s.
POP = Probability of Precipitation
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