June Weather in Eureka, United States

Last updated: June 24, 2025

In June, the average temperature in Eureka, United States hovers around 25°C (77°F), creating a comfortable backdrop for your adventures. Visitors can expect minimum temperatures as low as 10°C (50°F) and can bask in the warmth of maximums reaching up to 37°C (100°F). However, be prepared for some moisture, as the region sees an average precipitation of 114 mm (4.5 in) over about 9 days, along with an average humidity of 83%. Don't forget your umbrella and sunscreen!

June Temperature in Eureka

In June in Eureka, the average temperature is 25°C (77°F). Maximums can reach 37°C (100°F), and minimums can be as low as 10°C (50°F). Be prepared for warm days and cool nights when traveling to Eureka during this time.

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 25°C (77°F), with highs reaching up to 37°C (100°F) and lows dropping to around 10°C (50°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 114 mm (4.5 in) over the course of 9 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 114 mm (4.5 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Eureka

In Eureka in June humidity is 83%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket, making it essential for travelers to stay hydrated and seek shade to enjoy their adventures comfortably.

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 83%, 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	1°C (34°F)	50 mm (2.0 inches)	77%	moderate
February Weather	2°C (35°F)	40 mm (1.6 inches)	76%	high
March Weather	9°C (49°F)	84 mm (3.3 inches)	71%	high
April Weather	13°C (56°F)	100 mm (3.9 inches)	73%	very high
May Weather	19°C (66°F)	203 mm (8.0 inches)	83%	very high
June Weather	25°C (77°F)	114 mm (4.5 inches)	83%	extreme
July Weather	26°C (80°F)	93 mm (3.7 inches)	81%	extreme
August Weather	25°C (78°F)	112 mm (4.4 inches)	73%	very high
September Weather	23°C (73°F)	77 mm (3.0 inches)	67%	very high
October Weather	14°C (58°F)	143 mm (5.6 inches)	72%	high
November Weather	8°C (46°F)	28 mm (1.1 inches)	82%	moderate
December Weather	4°C (40°F)	31 mm (1.2 inches)	85%	moderate