Rainier, OR Weather Forecast

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Rainier, OR Weather Forecast

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Rainier OR weather  - Clear - 56°F
Clear
56°F
Updated 7:44 pm
Feels Like 46°F
Humidity 61%
Wind NW 6 mph
Barometer  29.96 in
Dew Point 43°F
Rainier OR weather  - Clear - 13°C
Clear
13°C
Updated 7:44 pm
Feels Like 8°C
Humidity 61%
Wind NW 10 km/h
Barometer  101.4 kPa
Dew Point 6°C

Rainier Weather Forecast

TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY
Rainier, OR Weather - Tonight Mostly Cloudy Rainier, OR Weather - Monday Mostly Cloudy Rainier, OR Weather - Monday Night Mostly Cloudy Rainier, OR Weather - Tuesday Mostly Sunny Rainier, OR Weather - Tuesday Night Mostly Clear Rainier, OR Weather - Wednesday Sunny Rainier, OR Weather - Wednesday Night Mostly Clear Rainier, OR Weather - Thursday Partly Sunny Rainier, OR Weather - Thursday Night Chance Of Rain Rainier, OR Weather - Friday Chance Of Rain Rainier, OR Weather - Friday Night Partly Cloudy Rainier, OR Weather - Saturday Chance Of Rain
Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Sunny Mostly Clear Sunny Mostly Clear Partly Sunny Chance of Rain Chance of Rain Partly Cloudy Chance of Rain
Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
Lo: 41°FLo: 5°C Hi: 70°FHi: 21°C
Lo: 41°FLo: 5°C Hi: 71°FHi: 22°C
Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
Lo: 41°FLo: 5°C Hi: 59°FHi: 15°C
Lo: 40°FLo: 4°C Hi: 59°FHi: 15°C
POP: 20% POP: 20% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 502 PM PDT Sun Oct 18 2026 Rainier, OR Weather - WeatherWorld.com

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Rainier Forecast Discussion

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Issued: 450 PM PDT Sun Oct 18 2026

Discussion

...Now through Sunday...Tranquil early fall weather will continue into the workweek despite an upper-level trough approaching the coast through tomorrow. There remains good consensus that the trough will elongate and pinch off into a closed low well offshore which will ultimately drift south and away from the Pacific Northwest. Locally, cloud cover will increase this afternoon through tonight as the system makes its closest approach, which will stymie radiational cooling and mitigate f...