June Weather in Walnut Creek, United States

Last updated: June 24, 2025

In June, the average temperature in Walnut Creek, United States hovers around 25°C (77°F). Expect a delightful range, with minimums dipping to 10°C (51°F) and maximums reaching a warm 35°C (96°F). However, you'll want to be prepared for some rain, as 139 mm (5.5 in) of precipitation falls over approximately 15 days. With an average humidity of 81%, it’s safe to say that your visit will be both lush and vibrant!

June Temperature in Walnut Creek

In June in Walnut Creek, the average temperature is 25°C (77°F). Maximums can reach 35°C (96°F) and minimums can be as low as 10°C (51°F). This mild climate makes Walnut Creek an ideal destination for travelers looking to enjoy pleasant weather.

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

The chart illustrates June 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, June typically has an average temperature of 25°C (77°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (51°F).

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

June Precipitation in Walnut Creek

In Walnut Creek in June, the precipitation amount is 139 mm (5.5 in), occurring over 15 days.

June Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Walnut Creek, June typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Walnut Creek

In Walnut Creek in June, humidity is 81%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, thick blanket, making traveling quite challenging as you may feel sticky and sluggish, requiring frequent breaks to stay refreshed and hydrated.

June Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, 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 June generated using information from the Copernicus Climate Change Service.

June UV Index in Walnut Creek

In Walnut Creek in June, 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 June

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

Data source: Walnut Creek June 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 June 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 June’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 June’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