National Weather Service Forecast for: Hermiston OR
Issued by: National Weather Service Pendleton, OR
Updated: 11:46 pm PDT Jun 21, 2026
 
Overnight

Overnight: Mostly clear, with a low around 55. Light southwest wind.
Mostly Clear
 Monday

Monday: Sunny, with a high near 91. Calm wind becoming northeast around 6 mph in the afternoon.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 56. Northeast wind 5 to 8 mph becoming calm in the evening.
Mostly Clear
 Tuesday

Tuesday: Increasing clouds, with a high near 93. Calm wind becoming north 5 to 9 mph in the afternoon.
Increasing
Clouds
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm in the evening.
Partly Cloudy
 Wednesday

Wednesday: Sunny, with a high near 95.
Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 61.
Partly Cloudy
 Thursday

Thursday: Mostly sunny, with a high near 89.
Mostly Sunny
 Thursday
Night
Thursday Night: A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 54.
Chance
Showers
Lo 55 °F Hi 91 °F Lo 56 °F Hi 93 °F Lo 57 °F Hi 95 °F Lo 61 °F Hi 89 °F Lo 54 °F

 

Overnight
 
 Mostly clear, with a low around 55. Light southwest wind.
Monday
 
 Sunny, with a high near 91. Calm wind becoming northeast around 6 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 56. Northeast wind 5 to 8 mph becoming calm in the evening.
Tuesday
 
 Increasing clouds, with a high near 93. Calm wind becoming north 5 to 9 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm in the evening.
Wednesday
 
 Sunny, with a high near 95.
Wednesday Night
 
 Partly cloudy, with a low around 61.
Thursday
 
 Mostly sunny, with a high near 89.
Thursday Night
 
 A 30 percent chance of showers after 11pm. Mostly cloudy, with a low around 54.
Friday
 
 A chance of showers before 11am. Mostly cloudy, with a high near 77.
Friday Night
 
 Partly cloudy, with a low around 50. Breezy.
Saturday
 
 Mostly sunny, with a high near 74. Breezy.
Saturday Night
 
 Partly cloudy, with a low around 48. Breezy.
Sunday
 
 Sunny, with a high near 75.

 

Forecast from NOAA-NWS for Hermiston OR.