Walnut Creek (CA) Weather and Climate: A Comprehensive Guide
The climate in Walnut Creek is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to mild in the cooler months.
It typically sees modest rainfall throughout the year.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
In Walnut Creek, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 30°C in July. In December, the coolest month of the year, temperatures drop to a moderate 14°C.
At night, you can expect cooler temperatures, with averages dropping to around 4°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Walnut Creek tends toward drier weather patterns, receiving approximately 479 mm of rain per year. Walnut Creek can be quite wet during December, receiving approximately 102 mm of precipitation over 13 rainy days. In contrast August, experiences much drier conditions, with 0.1 mm of rainfall, spread across 0 rainy days. For more details, please visit our Walnut Creek Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Walnut Creek can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 10.8 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.3 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Walnut Creek.
The city experiences its highest humidity in January, reaching 80%. In June, the humidity drops to its lowest level at 71%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
broken clouds and slight rain overcast and chance of slight rain partly cloudy and rainForecast for Walnut Creek (CA)
5 m/s
4 m/s
6 m/s
The best time of year to visit Walnut Creek in the United States of America
During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Yes, the months of May, June, July, August and September are very dry.
July has an average maximum temperature of 30°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 14°C.
December tops the wettest month list with 102 mm of rainfall.
August is the driest month with 0 mm of precipitation.
May is the sunniest month with an average of 324 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
