Plain, WA Weather Forecast

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Plain, WA Weather Forecast

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Plain WA weather  - Mostly Cloudy - 68°F
Mostly Cloudy
68°F
Updated 6:03 pm
Feels Like 58°F
Humidity 33%
Wind ESE 9 mph
Barometer  29.75 in
Dew Point 38°F
Plain WA weather  - Mostly Cloudy - 20°C
Mostly Cloudy
20°C
Updated 6:03 pm
Feels Like 14°C
Humidity 33%
Wind ESE 14 km/h
Barometer  100.7 kPa
Dew Point 3°C

Plain Weather Forecast

TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT LABOR DAY MONDAY NIGHT TUESDAY WEDNESDAY THURSDAY
Plain, WA Weather - Tonight Chance Of Showers Plain, WA Weather - Friday Chance Of T-Storm Plain, WA Weather - Friday Night Chance Of Showers Plain, WA Weather - Saturday Chance Of T-Storm Plain, WA Weather - Saturday Night Chance Of Showers Plain, WA Weather - Sunday Partly Cloudy Plain, WA Weather - Sunday Night Chance Of Showers Plain, WA Weather - Labor Day Chance Of Showers Plain, WA Weather - Monday Night Chance Of Showers Plain, WA Weather - Tuesday Partly Cloudy Plain, WA Weather - Wednesday Partly Cloudy Plain, WA Weather - Thursday Partly Cloudy
Chance of Showers Chance of T-Storm Chance of Showers Chance of T-Storm Chance of Showers Partly Cloudy Chance of Showers Chance of Showers Chance of Showers Partly Cloudy Partly Cloudy Partly Cloudy
Lo: 45°FLo: 7°C Hi: 65°FHi: 18°C
Lo: 47°FLo: 8°C Hi: 66°FHi: 19°C
Lo: 46°FLo: 8°C Hi: 70°FHi: 21°C
Lo: 50°FLo: 10°C Hi: 66°FHi: 19°C
Lo: 50°FLo: 10°C
Hi: 66°FHi: 19°C
Lo: 50°FLo: 10°C
Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C
Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C
Hi: 76°FHi: 24°C
Lo: 59°FLo: 15°C
POP: 50% POP: 50% POP: 50% POP: 50% POP: 40% POP: 30% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 207 PM PDT Thu Sep 03 2026 Plain, WA Weather - WeatherWorld.com

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Plain Forecast Discussion

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Issued: 447 PM PDT Thu Sep 3 2026

Key Messages

  • Cool and showery weather expected through Labor Day Weekend with isolated thunderstorms.
  • A warming and drying trend returns around the middle of next week.

Discussion

... Thursday night through Monday: A closed upper level low continues to spin along the WA/OR coast, keeping the Inland Northwest in an active pattern through Labor Day Weekend with periodic showers and cooler than normal temperatures. A shortwave pivoting around the low Thursday evening into early Friday will bring a mor...