August Weather in Eureka, United States

Last updated: June 24, 2025

In August, the average temperature in Eureka, United States hovers around 24°C (75°F). Expect the minimum to dip to 9°C (48°F), while the maximum can soar up to 37°C (98°F). With just 9 mm (0.3 in) of precipitation spread over 1 day, the weather remains relatively dry, boasting an average humidity of 32%. Perfect for enjoying the outdoors!

August Temperature in Eureka

In August in Eureka, the average temperature is 24°C (75°F). Maximum temperatures can reach 37°C (98°F), while minimums can drop as low as 9°C (48°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates August 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, August typically has an average temperature of 24°C (75°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (48°F).

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

August Precipitation in Eureka

In Eureka in August, the precipitation amount is 9 mm (0.3 in) over the course of 1 day.

August Precipitation Trends in Eureka

The chart displays monthly precipitation patterns in Eureka, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Eureka, August typically receives around 9 mm (0.3 inches) of precipitation spread over approximately 1 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Eureka

In Eureka in August, humidity is 32%. With an average temperature of 24°C (75°F), this humidity feels like a pleasant, mild embrace, making it comfortable for traveling and exploring the sights without feeling overheated or clammy.

August Average Humidity in Eureka

This chart illustrates the average monthly humidity levels in Eureka, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Eureka is approximately 32%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Eureka

In Eureka in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Eureka in August, 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 August, the maximum UV index in Eureka typically reaches 11, which falls under the extreme exposure category.

Data source: Eureka August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	29 mm (1.1 inches)	84%	moderate
February Weather	-3°C (27°F)	29 mm (1.1 inches)	87%	high
March Weather	1°C (35°F)	57 mm (2.3 inches)	80%	very high
April Weather	8°C (46°F)	39 mm (1.5 inches)	71%	very high
May Weather	12°C (55°F)	39 mm (1.5 inches)	55%	extreme
June Weather	20°C (68°F)	10 mm (0.4 inches)	51%	extreme
July Weather	25°C (77°F)	16 mm (0.6 inches)	41%	extreme
August Weather	24°C (75°F)	9 mm (0.3 inches)	32%	extreme
September Weather	18°C (65°F)	12 mm (0.5 inches)	41%	very high
October Weather	9°C (48°F)	22 mm (0.9 inches)	61%	high
November Weather	4°C (39°F)	22 mm (0.8 inches)	79%	moderate
December Weather	-3°C (26°F)	29 mm (1.1 inches)	83%	moderate