July Weather in Eureka, United States

Last updated: June 24, 2025

In July, the average temperature in Eureka, United States hovers around 25°C (77°F). Temperatures can range from a cool 13°C (56°F) to a warm 35°C (95°F). Expect about 109 mm (4.3 in) of precipitation over 11 days, contributing to an average humidity level of 80%. Stay prepared for a mix of warmth and moisture!

July Temperature in Eureka

In July in Eureka, the average temperature is 25°C (77°F). Maximums can reach 35°C (95°F), and minimums can be as low as 13°C (56°F). This climate makes it an ideal time for travelers to enjoy outdoor activities while being prepared for varying temperatures.

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 35°C (95°F) and lows dropping to around 13°C (56°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 109 mm (4.3 in), occurring over a span of 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 109 mm (4.3 inches) of precipitation spread over approximately 11 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 80%. With an average temperature of 25°C (77°F), this humidity feels like traveling through a warm, tropical rainforest where the air is thick and steamy, making even the simplest stroll feel like a workout.

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 80%, 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	-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