July Weather in Eureka, United States

Last updated: June 24, 2025

In Eureka, United States, the average temperature in July hovers around 25°C (77°F), making it a pleasant time to explore. Expect temperatures to range from a cool 7°C (46°F) to a sweltering 37°C (99°F). During this month, precipitation averages 16 mm (0.6 in) over 3 days, and humidity sits at a comfortable 41%, providing a lovely backdrop for outdoor activities.

July Temperature in Eureka

In July in Eureka, the average temperature is 25°C (77°F). Maximum temperatures can reach up to 37°C (99°F), while minimum temperatures can drop as low as 7°C (46°F). Overall, this diverse temperature range makes it a perfect time for travelers to experience the sights while enjoying comfortable weather.

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 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 7°C (46°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 precipitation amount is 16 mm (0.6 in), spread over a duration of 3 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 16 mm (0.6 inches) of precipitation spread over approximately 3 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Eureka

In Eureka in July humidity is 41%. With an average temperature of 25°C (77°F), this humidity feels like a pleasant embrace, making it comfortable for traveling and exploring the area without feeling overly sticky or weighed down.

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 41%, 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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For 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 12, which falls under the extreme 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	-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