October Weather in Walnut Creek, United States

Last updated: June 24, 2025

In October, the average temperature in Walnut Creek, United States is a pleasant 19°C (67°F). Expect a wide range, with minimums dipping to 1°C (35°F) and maximums soaring to 36°C (97°F). Additionally, prepare for 65 mm (2.5 in) of precipitation spread over 8 days, contributing to an average humidity level of 80%.

October Temperature in Walnut Creek

In October in Walnut Creek, the average temperature is 19°C (67°F). Maximums can reach 36°C (97°F), while minimums can drop as low as 1°C (35°F). Pack accordingly to enjoy both warm days and cool evenings during your travels!

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

The chart illustrates October 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, October typically has an average temperature of 19°C (67°F), with highs reaching up to 36°C (97°F) and lows dropping to around 1°C (35°F).

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

October Precipitation in Walnut Creek

In Walnut Creek in October, the precipitation amount is 65 mm (2.5 in) over a span of 8 days.

October Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Walnut Creek, October typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Walnut Creek

In Walnut Creek in October humidity is 80%. With an average temperature of 19°C (67°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor exploration a bit uncomfortable and sticky, yet it encourages you to seek out refreshing indoor activities or shaded spots to escape the heat.

October Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Walnut Creek is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Walnut Creek

In Walnut Creek in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Walnut Creek.

Maximum UV Index Levels in Walnut Creek for October

The chart shows the monthly maximum UV Index (UVI) for Walnut Creek in October, 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 October, the maximum UV index in Walnut Creek typically reaches 8, which falls under the very high exposure category.

Data source: Walnut Creek October 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 October 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 October’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 October’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