National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

Hermiston, Hermiston Municipal Airport (KHRI)

Lat: 45.82583°NLon: 119.26111°WElev: 636.0ft.

Clear

52°F

11°C

Humidity 66%
Wind Speed SE 3 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 31 Aug 04:00 AM PDT
Extended Forecast for

3 Miles W Plymouth WA

  • Today

    Today: Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 57. North wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 86 °F

    Gradual
    Clearing

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 11pm. Increasing clouds, with a low around 53. Southwest wind 11 to 16 mph, with gusts as high as 26 mph.

    Low: 53 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Partly sunny, with a high near 76. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely. Cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Thursday

    Thursday: A 40 percent chance of showers. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 46.

    Low: 46 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 11am. Mostly sunny, with a high near 74.

    High: 74 °F

    Slight Chance
    Showers then
    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Tonight
Increasing clouds, with a low around 57. North wind around 5 mph becoming calm in the evening.
Tuesday
Cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers after 11pm. Increasing clouds, with a low around 53. Southwest wind 11 to 16 mph, with gusts as high as 26 mph.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 76. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Wednesday Night
Showers likely. Cloudy, with a low around 49. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 72.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 46.
Friday
A 20 percent chance of showers before 11am. Mostly sunny, with a high near 74.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Plymouth WA
 45.93°N 119.4°W (Elev. 302 ft)
Last Update:
4:00 am PDT Aug 31, 2026
Forecast Valid:
4am PDT Aug 31, 2026-6pm PDT Sep 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation