July Weather in Washington, United States

Last updated: June 24, 2025

In July, the average temperature in Washington, United States hovers around 27°C (81°F), with potential extremes ranging from a cool 14°C (58°F) to a scorching 40°C (104°F). Expect 89 mm (3.5 in) of precipitation over approximately 8 days, contributing to the area's high average humidity of 81%. Prepare for a blend of warmth and moisture as you explore this vibrant locale!

July Temperature in Washington

In July in Washington, the average temperature is 27°C (81°F). Maximum temperatures can reach as high as 40°C (104°F), while minimum temperatures can drop to as low as 14°C (58°F). Travelers should be prepared for warm weather and occasional temperature fluctuations during this time.

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

The chart illustrates July temperature patterns in Washington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Washington, July typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (104°F) and lows dropping to around 14°C (58°F).

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

July Precipitation in Washington

In Washington in July, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

July Precipitation Trends in Washington

The chart displays monthly precipitation patterns in Washington, 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 Washington, July typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 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 Washington

In Washington in July humidity is 81%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy blanket enveloping you, making travel quite uncomfortable as it can quickly drain your energy and require frequent hydration breaks.

July Average Humidity in Washington

This chart illustrates the average monthly humidity levels in Washington, 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 Washington 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 Washington

In Washington in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Washington.

Maximum UV Index Levels in Washington for July

The chart shows the monthly maximum UV Index (UVI) for Washington 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 Washington typically reaches 11, which falls under the extreme exposure category.

Data source: Washington 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 Washington Compares to Other Months

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

This table compares monthly weather conditions in Washington, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	28 mm (1.1 inches)	76%	moderate
February Weather	-1°C (30°F)	27 mm (1.1 inches)	77%	moderate
March Weather	7°C (45°F)	86 mm (3.4 inches)	70%	high
April Weather	12°C (53°F)	60 mm (2.4 inches)	73%	very high
May Weather	18°C (65°F)	201 mm (7.9 inches)	82%	very high
June Weather	25°C (78°F)	94 mm (3.7 inches)	82%	extreme
July Weather	27°C (81°F)	89 mm (3.5 inches)	81%	extreme
August Weather	25°C (77°F)	95 mm (3.7 inches)	78%	very high
September Weather	22°C (72°F)	67 mm (2.7 inches)	71%	very high
October Weather	13°C (55°F)	121 mm (4.8 inches)	71%	high
November Weather	6°C (43°F)	31 mm (1.2 inches)	81%	moderate
December Weather	2°C (35°F)	28 mm (1.1 inches)	84%	moderate