NWS Forecast for Richland WA

National Weather Service Forecast for: Richland WA
Issued by: National Weather Service Pendleton, OR

Updated: 9:15 pm PST Dec 17, 2025

Tonight Mostly Cloudy then Chance Rain	Thursday Rain	Thursday Night Rain	Friday Chance Rain	Friday Night Mostly Clear	Saturday Mostly Sunny	Saturday Night Mostly Cloudy	Sunday Chance Rain	Sunday Night Chance Rain
Lo 41 °F	Hi 55 °F	Lo 42 °F	Hi 50 °F	Lo 38 °F	Hi 49 °F	Lo 34 °F	Hi 46 °F	Lo 36 °F

Tonight	A 30 percent chance of rain after 4am. Cloudy, with a low around 41. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Thursday	Rain, mainly after 7am. High near 55. South wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night	Rain, mainly before 4am. Low around 42. Southwest wind 16 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday	A 30 percent chance of rain, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 50. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Friday Night	Mostly clear, with a low around 38. Southwest wind around 11 mph, with gusts as high as 21 mph.
Saturday	Mostly sunny, with a high near 49.
Saturday Night	Mostly cloudy, with a low around 34.
Sunday	A 40 percent chance of rain. Partly sunny, with a high near 46.
Sunday Night	A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Monday	A chance of rain, mainly before 10am. Mostly sunny, with a high near 50.
Monday Night	A slight chance of rain. Partly cloudy, with a low around 34.
Tuesday	Partly sunny, with a high near 46.
Tuesday Night	A chance of rain and snow. Mostly cloudy, with a low around 32.
Wednesday	A chance of rain and snow. Partly sunny, with a high near 42.

Forecast from NOAA-NWS for Richland WA.