National Weather Service Forecast for: Hermiston OR
Issued by: National Weather Service Pendleton, OR
Updated: 3:26 pm PDT May 28, 2026
 
This
Afternoon
This Afternoon: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Northeast wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

 Tonight

Tonight: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Partly Cloudy

 Friday

Friday: A 20 percent chance of showers after 2pm. Increasing clouds, with a high near 70. Breezy, with a southwest wind 17 to 25 mph, with gusts as high as 40 mph.
Breezy.
Mostly Sunny
then Slight
Chance
Showers
 Friday
Night
Friday Night: Cloudy, then gradually becoming partly cloudy, with a low around 45. Breezy, with a southwest wind 15 to 23 mph, with gusts as high as 38 mph.
Mostly Cloudy
and Breezy
then Mostly
Cloudy
 Saturday

Saturday: Sunny, with a high near 70. West wind 13 to 17 mph, with gusts as high as 29 mph.
Sunny


 Saturday
Night
Saturday Night: Mostly clear, with a low around 45.
Mostly Clear


 Sunday

Sunday: Sunny, with a high near 74.
Sunny


 Sunday
Night
Sunday Night: Partly cloudy, with a low around 47.
Partly Cloudy


 Monday

Monday: Mostly sunny, with a high near 80.
Mostly Sunny
Hi 89 °F Lo 54 °F Hi 70 °F Lo 45 °F Hi 70 °F Lo 45 °F Hi 74 °F Lo 47 °F Hi 80 °F

Severe Thunderstorm Watch
 

This Afternoon
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Northeast wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
 
 A 20 percent chance of showers after 2pm. Increasing clouds, with a high near 70. Breezy, with a southwest wind 17 to 25 mph, with gusts as high as 40 mph.
Friday Night
 
 Cloudy, then gradually becoming partly cloudy, with a low around 45. Breezy, with a southwest wind 15 to 23 mph, with gusts as high as 38 mph.
Saturday
 
 Sunny, with a high near 70. West wind 13 to 17 mph, with gusts as high as 29 mph.
Saturday Night
 
 Mostly clear, with a low around 45.
Sunday
 
 Sunny, with a high near 74.
Sunday Night
 
 Partly cloudy, with a low around 47.
Monday
 
 Mostly sunny, with a high near 80.
Monday Night
 
 Partly cloudy, with a low around 50.
Tuesday
 
 Sunny, with a high near 85.
Tuesday Night
 
 Partly cloudy, with a low around 54.
Wednesday
 
 Mostly sunny, with a high near 85.
Wednesday Night
 
 Partly cloudy, with a low around 52.
Thursday
 
 Sunny, with a high near 83.

 

Forecast from NOAA-NWS for Hermiston OR.