Eureka Weather in October

The climate in Eureka during October can be summarized as mild and a little damp.

October is in the fall / autumn in Eureka and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 8°C (47°F) is normal.

On average October is the 6th driest month of the year in Eureka with around 86mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.5 hours of sunshine per day.

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 Eureka in October 2025.