Hermiston Weather in September

What's the weather like in Hermiston (Oregon) in September 2024?

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

September is in the fall / autumn in Hermiston and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 9°C (48°F) is normal.

Hermiston weather averages (imperial / metric)
Daytime temperature 26°C 78.7°F
Nightly temperature 9.1°C 48.3°F
Average temperature 17.5°C 63.5°F
Daily sunshine 9.6 hrs
Avg rainfall 10 mm 0.4 ins
Rainy days 4 days
Sea temperature 13.4°C 56.1°F
Humidity 49%
Windspeed 13kph 8 mph

On average September is the 3rd driest month of the year in Hermiston with around 10mm 0.4 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.6 hours of sunshine per day.

September temperatures in Hermiston

Hermiston average temperature in September

September rainfall

Hermiston average rain in September

September hourly sunshine

Hermiston 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 Hermiston in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Hermiston weather stats

Hermiston weather statistics
Hottest month: July 31.2°C 88.2°F
Driest month: July 5mm 0.2ins
Sunniest month: July 13.1hrs
Coldest month: January 5°C 41°F
Wettest month: December 33mm 1.3ins
Map showing location of Hermiston (45.84041, -119.28946) Hermiston map pin © Google

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