July Weather in Eureka, United States

Last updated: June 24, 2025

In July, the average temperature in Eureka, United States is a warm 26°C (80°F). Expect temperatures to range from a minimum of 16°C (60°F) to a sweltering maximum of 39°C (102°F). During this time, the area receives about 95 mm (3.7 in) of precipitation spread over 11 days, contributing to an average humidity of 81%.

July Temperature in Eureka

In July in Eureka, the average temperature is 26°C (80°F), with maximums reaching 39°C (102°F) and minimums dropping to as low as 16°C (60°F). It's a perfect time for travelers to enjoy warm weather while also being prepared for cooler evenings.

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

The chart illustrates July 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, July typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 16°C (60°F).

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

July Precipitation in Eureka

In Eureka in July, the total precipitation amount is 95 mm (3.7 in) spread over 11 days.

July Precipitation Trends in Eureka

The chart displays monthly precipitation patterns in Eureka, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Eureka, July typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Eureka

In Eureka in July, humidity is 81%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities feel more strenuous and requiring frequent breaks to stay refreshed and hydrated.

July Average Humidity in Eureka

This chart illustrates the average monthly humidity levels in Eureka, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Eureka is approximately 81%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Eureka

In Eureka in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Eureka.

Maximum UV Index Levels in Eureka for July

The chart shows the monthly maximum UV Index (UVI) for Eureka in July, 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 July, the maximum UV index in Eureka typically reaches 10, which falls under the very high exposure category.

Data source: Eureka July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	75 mm (3.0 inches)	82%	moderate
February Weather	2°C (36°F)	81 mm (3.2 inches)	80%	moderate
March Weather	8°C (47°F)	129 mm (5.1 inches)	80%	high
April Weather	13°C (55°F)	124 mm (4.9 inches)	80%	very high
May Weather	19°C (67°F)	144 mm (5.7 inches)	82%	very high
June Weather	24°C (76°F)	88 mm (3.5 inches)	83%	extreme
July Weather	26°C (80°F)	95 mm (3.7 inches)	81%	very high
August Weather	24°C (76°F)	139 mm (5.5 inches)	80%	very high
September Weather	22°C (72°F)	56 mm (2.2 inches)	76%	very high
October Weather	15°C (59°F)	110 mm (4.3 inches)	76%	high
November Weather	7°C (45°F)	70 mm (2.8 inches)	85%	moderate
December Weather	4°C (40°F)	57 mm (2.2 inches)	86%	moderate