July Weather in Walnut Creek, United States

Last updated: June 24, 2025

In July, the average temperature in Walnut Creek, United States is a warm 27°C (81°F), perfect for outdoor adventures. Temperatures can vary, with a minimum of 14°C (58°F) and soaring up to a maximum of 37°C (98°F). Expect some rain, as 127 mm (5.0 in) of precipitation typically falls over about 16 days, contributing to an average humidity of 81%.

July Temperature in Walnut Creek

In July in Walnut Creek, the average temperature is 27°C (81°F). The maximum can reach 37°C (98°F) and the minimum can be as low as 14°C (58°F). This pleasant climate makes it an ideal destination for travelers seeking both warmth and comfort.

July Weather in Walnut Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Walnut Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Creek, July typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (98°F) and lows dropping to around 14°C (58°F).

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

July Precipitation in Walnut Creek

In Walnut Creek in July, the precipitation amount is 127 mm (5.0 in), distributed over 16 days.

July Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, 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 Walnut Creek, July typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 16 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 Walnut Creek

In Walnut Creek 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 Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, 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 Walnut Creek 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 Walnut Creek

In Walnut Creek 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 Walnut Creek.

Maximum UV Index Levels in Walnut Creek for July

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

Data source: Walnut Creek 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 Walnut Creek Compares to Other Months

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

This table compares monthly weather conditions in Walnut Creek, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	88 mm (3.5 inches)	85%	moderate
February Weather	10°C (51°F)	85 mm (3.3 inches)	82%	high
March Weather	12°C (54°F)	72 mm (2.8 inches)	81%	very high
April Weather	17°C (63°F)	104 mm (4.1 inches)	80%	very high
May Weather	22°C (71°F)	115 mm (4.5 inches)	81%	extreme
June Weather	25°C (77°F)	139 mm (5.5 inches)	81%	extreme
July Weather	27°C (81°F)	127 mm (5.0 inches)	81%	extreme
August Weather	26°C (79°F)	159 mm (6.3 inches)	80%	very high
September Weather	24°C (75°F)	148 mm (5.8 inches)	79%	very high
October Weather	19°C (67°F)	65 mm (2.5 inches)	80%	very high
November Weather	12°C (53°F)	88 mm (3.5 inches)	85%	moderate
December Weather	9°C (49°F)	107 mm (4.2 inches)	86%	moderate