June Weather in Eureka, United States

Last updated: June 24, 2025

The average temperature in Eureka, United States during June is a pleasant 23°C (74°F). Expect a range from a refreshing 10°C (51°F) at night to a warm 34°C (93°F) during the day. With 138 mm (5.4 in) of precipitation spread over 11 days, don't forget your umbrella! Remember, the average humidity lingers around 82%, making it feel quite tropical.

June Temperature in Eureka

In June, in Eureka, the average temperature is 23°C (74°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 10°C (51°F). This comfortable climate makes Eureka an ideal destination for travelers seeking both warm days and cool evenings.

June Weather in Eureka: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Eureka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eureka, June typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Eureka generated using information from the Copernicus Climate Change Service.

June Precipitation in Eureka

In Eureka in June, the precipitation amount is 138 mm (5.4 in) distributed over 11 days.

June Precipitation Trends in Eureka

The chart displays monthly precipitation patterns in Eureka, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Eureka, June typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

June Humidity in Eureka

In Eureka in June, humidity is 82%. With an average temperature of 23°C (74°F), this humidity feels like you are walking through a warm, damp blanket, making travel a bit uncomfortable and sticky as you navigate the air thick with moisture.

June Average Humidity in Eureka

This chart illustrates the average monthly humidity levels in Eureka, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Eureka is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Eureka

In Eureka in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Eureka.

Maximum UV Index Levels in Eureka for June

The chart shows the monthly maximum UV Index (UVI) for Eureka in June, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In June, the maximum UV index in Eureka typically reaches 11, which falls under the extreme exposure category.

Data source: Eureka June UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How June Weather in Eureka Compares to Other Months

Weather in Eureka varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Eureka, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Eureka, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	61 mm (2.4 inches)	82%	moderate
February Weather	-2°C (29°F)	68 mm (2.7 inches)	83%	moderate
March Weather	5°C (42°F)	106 mm (4.2 inches)	84%	high
April Weather	10°C (51°F)	117 mm (4.6 inches)	85%	very high
May Weather	18°C (64°F)	165 mm (6.5 inches)	79%	very high
June Weather	23°C (74°F)	138 mm (5.4 inches)	82%	extreme
July Weather	25°C (77°F)	109 mm (4.3 inches)	80%	very high
August Weather	23°C (74°F)	80 mm (3.1 inches)	81%	very high
September Weather	21°C (70°F)	69 mm (2.7 inches)	80%	very high
October Weather	13°C (56°F)	130 mm (5.1 inches)	82%	high
November Weather	4°C (40°F)	56 mm (2.2 inches)	88%	moderate
December Weather	1°C (34°F)	55 mm (2.2 inches)	84%	low