National Weather Service Forecast for: Hermiston OR
Issued by: National Weather Service Pendleton, OR
Updated: 3:00 pm PDT Jun 29, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 55. Southwest wind 16 to 18 mph, with gusts as high as 31 mph.
Mostly Cloudy
 Tuesday

Tuesday: Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 17 to 20 mph, with gusts as high as 31 mph.
Becoming
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 49. Southwest wind 15 to 20 mph, with gusts as high as 33 mph.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 78. Southwest wind 14 to 16 mph, with gusts as high as 26 mph.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 49. Southwest wind 11 to 16 mph, with gusts as high as 28 mph.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 81.
Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52.
Partly Cloudy
 Friday

Friday: Sunny, with a high near 85.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 53.
Clear
Lo 55 °F Hi 78 °F Lo 49 °F Hi 78 °F Lo 49 °F Hi 81 °F Lo 52 °F Hi 85 °F Lo 53 °F

 

Tonight
 
 Mostly cloudy, with a low around 55. Southwest wind 16 to 18 mph, with gusts as high as 31 mph.
Tuesday
 
 Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 17 to 20 mph, with gusts as high as 31 mph.
Tuesday Night
 
 Mostly clear, with a low around 49. Southwest wind 15 to 20 mph, with gusts as high as 33 mph.
Wednesday
 
 Sunny, with a high near 78. Southwest wind 14 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
 
 Mostly clear, with a low around 49. Southwest wind 11 to 16 mph, with gusts as high as 28 mph.
Thursday
 
 Sunny, with a high near 81.
Thursday Night
 
 Partly cloudy, with a low around 52.
Friday
 
 Sunny, with a high near 85.
Friday Night
 
 Clear, with a low around 53.
Independence Day
 
 Sunny, with a high near 89.
Saturday Night
 
 Mostly clear, with a low around 56.
Sunday
 
 Sunny, with a high near 92.
Sunday Night
 
 Mostly clear, with a low around 57.
Monday
 
 Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Hermiston OR.