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Simpson Lake, WA Weather Forecast

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Simpson Lake, WA Weather Forecast

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Simpson Lake WA Weather - Clear - 38°F
Clear
38°F
Updated 7:59 pm
Feels Like 35°F
Humidity 54%
Wind SSW 4 mph
Barometer  30.03 in
Visibility 6 mi
Simpson Lake WA Weather - Clear - 3°C
Clear
3°C
Updated 7:59 pm
Feels Like 1°C
Humidity 54%
Wind SSW 6 km/h
Barometer  1017 mb
Visibility 10 km
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Simpson Lake Weather Forecast

TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY FRIDAY SATURDAY SUNDAY SUNDAY NIGHT MONDAY
Simpson Lake, WA Weather - Tonight Mostly Clear Simpson Lake, WA Weather - Tuesday Mostly Sunny Simpson Lake, WA Weather - Tuesday Night Mostly Cloudy Simpson Lake, WA Weather - Wednesday Sunny Simpson Lake, WA Weather - Wednesday Night Mostly Clear Simpson Lake, WA Weather - Thursday Partly Cloudy Simpson Lake, WA Weather - Friday Partly Cloudy Simpson Lake, WA Weather - Saturday Partly Cloudy Simpson Lake, WA Weather - Sunday Mostly Sunny Simpson Lake, WA Weather - Sunday Night Chance Of Showers Simpson Lake, WA Weather - Monday Snow Showers
Mostly Clear Mostly Sunny Mostly Cloudy Sunny Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Mostly Sunny Chance of Showers Snow Showers
Lo: 30°FLo: -1°C Hi: 56°FHi: 13°C
 Lo: 36°FLo: 2°C Hi: 65°FHi: 18°C
 Lo: 36°FLo: 2°C Hi: 66°FHi: 19°C
Lo: 36°FLo: 2°C		 Hi: 66°FHi: 19°C
Lo: 36°FLo: 2°C		 Hi: 66°FHi: 19°C
Lo: 36°FLo: 2°C		 Hi: 60°FHi: 16°C
 Lo: 36°FLo: 2°C Hi: 57°FHi: 14°C
POP: 20% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 225 PM PDT Mon Oct 12 2026 Simpson Lake, WA Weather - WeatherWorld.com

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Simpson Lake Forecast Discussion

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Issued: 441 PM PDT Mon Oct 12 2026

Key Messages

  • Chilly overnight lows the next couple of mornings with widespread frost/freeze conditions.
  • Dry conditions, light winds, and moderating temperatures through the week.
  • Gusty westerly winds and cooler temperatures return next weekend.

Discussion

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Tonight: An area of low pressure responsible for the cloud cover and showers across southeastern WA and Idaho Panhandle today will finally drift south of the area with clear skies returning to the entire Inland NW. Winds will be light and gener...