Eureka Weather in June

What's the weather like in Eureka (Illinois) in June 2025?

The climate in Eureka during June can be summarized as warm and a little damp.

June is in the summer in Eureka and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (83°F), whilst at night 15°C (59°F) is normal.

Eureka weather averages (imperial / metric)
Daytime temperature 28.5°C 83.2°F
Nightly temperature 15.2°C 59.3°F
Average temperature 21.8°C 71.2°F
Daily sunshine 10.9 hrs
Avg rainfall 96 mm 3.8 ins
Rainy days 9 days
Sea temperature 13.8°C 56.8°F
Humidity 67%
Windspeed 15.5kph 10 mph

On average June is the 4th wettest month of the year in Eureka with around 96mm 3.8 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 10.9 hours of sunshine per day.

June temperatures in Eureka

Eureka average temperature in June

June rainfall

Eureka average rain in June

June hourly sunshine

Eureka average rain in June

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 June 2025.

Other monthly averages

Best places to visit in June

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Eureka weather stats

Eureka weather statistics
Hottest month: July 29.8°C 85.6°F
Driest month: February 41mm 1.6ins
Sunniest month: July 10.8hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: July 106mm 4.2ins
Map showing location of Eureka (40.72143, -89.27286) Eureka map pin © Google

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