July Weather in Issaquah, United States

Last updated: June 24, 2025

In July, the average temperature in Issaquah, United States hovers around 18°C (65°F), making it a pleasant time to visit. Expect a minimum of 8°C (47°F) and a maximum of 32°C (91°F), providing a diverse climate experience. During this month, the region sees about 28 mm (1.1 in) of precipitation over 7 days, with an average humidity level of 79%. Whether you're exploring or relaxing, be prepared for a mix of comfortable warmth and occasional rain!

July Temperature in Issaquah

In July in Issaquah, the average temperature is 18°C (65°F). Maximums can reach 32°C (91°F) and minimums can be as low as 8°C (47°F). This pleasant weather makes Issaquah an ideal destination for outdoor activities and sightseeing.

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

The chart illustrates July temperature patterns in Issaquah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Issaquah, July typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (91°F) and lows dropping to around 8°C (47°F).

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

July Precipitation in Issaquah

In Issaquah in July, the precipitation amount is 28 mm (1.1 in) over a period of 7 days.

July Precipitation Trends in Issaquah

The chart displays monthly precipitation patterns in Issaquah, 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 Issaquah, July typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 7 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 Issaquah

In Issaquah in July, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

July Average Humidity in Issaquah

This chart illustrates the average monthly humidity levels in Issaquah, 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 Issaquah is approximately 79%, 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 Issaquah

In Issaquah in July, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Issaquah.

Maximum UV Index Levels in Issaquah for July

The chart shows the monthly maximum UV Index (UVI) for Issaquah 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 Issaquah typically reaches 9, which falls under the very high exposure category.

Data source: Issaquah 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 Issaquah Compares to Other Months

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

This table compares monthly weather conditions in Issaquah, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (40°F)	199 mm (7.9 inches)	86%	low
February Weather	4°C (39°F)	234 mm (9.2 inches)	86%	moderate
March Weather	7°C (44°F)	152 mm (6.0 inches)	87%	moderate
April Weather	9°C (49°F)	144 mm (5.7 inches)	84%	high
May Weather	13°C (55°F)	85 mm (3.3 inches)	81%	very high
June Weather	16°C (60°F)	78 mm (3.1 inches)	82%	very high
July Weather	18°C (65°F)	28 mm (1.1 inches)	79%	very high
August Weather	18°C (65°F)	23 mm (0.9 inches)	63%	very high
September Weather	15°C (60°F)	115 mm (4.5 inches)	62%	high
October Weather	10°C (50°F)	204 mm (8.1 inches)	83%	moderate
November Weather	7°C (45°F)	217 mm (8.5 inches)	89%	low
December Weather	4°C (40°F)	235 mm (9.3 inches)	88%	low