Yakima Weather in September

What's the weather like in Yakima (Washington) in September 2025?

The climate in Yakima during September can be summarized as mild and very dry.

September is in the fall / autumn in Yakima and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 7°C (44°F) is normal.

Yakima weather averages (imperial / metric)
Daytime temperature 24.2°C 75.6°F
Nightly temperature 6.6°C 43.9°F
Average temperature 15.4°C 59.7°F
Daily sunshine 8.7 hrs
Avg rainfall 10 mm 0.4 ins
Rainy days 4 days
Sea temperature 12.9°C 55.2°F
Humidity 57%
Windspeed 12.2kph 8 mph

On average September is the 2nd driest month of the year in Yakima with around 10mm 0.4 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 8.7 hours of sunshine per day.

September temperatures in Yakima

Yakima average temperature in September

September rainfall

Yakima average rain in September

September hourly sunshine

Yakima average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Yakima in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Yakima weather stats

Yakima weather statistics
Hottest month: July 29.1°C 84.4°F
Driest month: July 5mm 0.2ins
Sunniest month: July 11.7hrs
Coldest month: January 2.3°C 36.1°F
Wettest month: December 41mm 1.6ins
Map showing location of Yakima (46.60207, -120.5059) Yakima map pin © Google

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