July Weather in Hermiston, United States

Last updated: June 24, 2025

In Hermiston, United States, the average temperature in July is a warm 27°C (80°F). Temperatures can vary significantly, dipping to a comfortable 12°C (53°F) and soaring to a sizzling 43°C (110°F). With 0 mm (0.0 in) of precipitation over 0 days, you can expect a dry month, complemented by an average humidity of 76%. Perfect for enjoying the outdoors!

July Temperature in Hermiston

In July in Hermiston, the average temperature is 27°C (80°F), with maximums reaching 43°C (110°F) and minimums dipping as low as 12°C (53°F). This makes it essential for travelers to prepare for both the heat and cooler evenings while exploring the area.

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

The chart illustrates July temperature patterns in Hermiston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hermiston, July typically has an average temperature of 27°C (80°F), with highs reaching up to 43°C (110°F) and lows dropping to around 12°C (53°F).

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

July Precipitation in Hermiston

In Hermiston in July, the precipitation amount is 0 mm (0.0 in) during 0 days.

July Precipitation Trends in Hermiston

The chart displays monthly precipitation patterns in Hermiston, 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 Hermiston, July typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 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 Hermiston

In Hermiston in July, humidity is 76%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket enveloping you, making outdoor activities and travel a bit challenging as you navigate the sticky air and sweat-drenched clothing.

July Average Humidity in Hermiston

This chart illustrates the average monthly humidity levels in Hermiston, 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 Hermiston is approximately 76%, 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 Hermiston

In Hermiston 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 Hermiston.

Maximum UV Index Levels in Hermiston for July

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

Data source: Hermiston 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 Hermiston Compares to Other Months

Weather in Hermiston varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Hermiston, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hermiston, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (37°F)	40 mm (1.6 inches)	86%	low
February Weather	3°C (38°F)	54 mm (2.1 inches)	86%	moderate
March Weather	8°C (46°F)	40 mm (1.6 inches)	85%	high
April Weather	12°C (54°F)	31 mm (1.2 inches)	83%	high
May Weather	18°C (64°F)	17 mm (0.7 inches)	77%	very high
June Weather	22°C (72°F)	10 mm (0.4 inches)	81%	very high
July Weather	27°C (80°F)	0 mm (0.0 inches)	76%	very high
August Weather	26°C (79°F)	5 mm (0.2 inches)	60%	very high
September Weather	20°C (68°F)	12 mm (0.5 inches)	58%	high
October Weather	12°C (54°F)	29 mm (1.1 inches)	75%	moderate
November Weather	6°C (44°F)	39 mm (1.6 inches)	85%	moderate
December Weather	3°C (37°F)	40 mm (1.6 inches)	87%	low