July Weather in Walnut Creek, United States

Last updated: June 24, 2025

In July, the average temperature in Walnut Creek, United States hovers around 32°C (89°F), with a minimum of 19°C (67°F) and a scorching maximum of 43°C (109°F). Expect about 32 mm (1.3 in) of precipitation over the course of 6 days. The average humidity sits at a comfortable 27%, making for a warm yet pleasant atmosphere.

July Temperature in Walnut Creek

In July in Walnut Creek, the average temperature is 32°C (89°F). Maximums can reach 43°C (109°F), while minimums can be as low as 19°C (67°F). Travelers should be prepared for hot days and cooler evenings during this time.

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 32°C (89°F), with highs reaching up to 43°C (109°F) and lows dropping to around 19°C (67°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 total precipitation amount is 32 mm (1.3 in) over the course of 6 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 32 mm (1.3 inches) of precipitation spread over approximately 6 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 27%. With an average temperature of 32°C (89°F), this humidity feels like a warm embrace, making traveling slightly uncomfortable but also invigorating, as the air surrounds you with a gentle, sticky warmth that reminds you of the vibrant atmosphere of the locale.

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 27%, 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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, 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 12, 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	8°C (47°F)	28 mm (1.1 inches)	77%	moderate
February Weather	10°C (49°F)	29 mm (1.1 inches)	80%	high
March Weather	13°C (56°F)	36 mm (1.4 inches)	68%	very high
April Weather	19°C (67°F)	8 mm (0.3 inches)	58%	very high
May Weather	23°C (74°F)	7 mm (0.3 inches)	45%	extreme
June Weather	30°C (86°F)	1 mm (0.1 inches)	31%	extreme
July Weather	32°C (89°F)	32 mm (1.3 inches)	27%	extreme
August Weather	32°C (89°F)	14 mm (0.6 inches)	30%	extreme
September Weather	27°C (81°F)	15 mm (0.6 inches)	48%	very high
October Weather	19°C (67°F)	20 mm (0.8 inches)	59%	high
November Weather	14°C (57°F)	26 mm (1.0 inches)	70%	moderate
December Weather	8°C (47°F)	21 mm (0.8 inches)	77%	moderate