Walnut Creek, CA Weather Tomorrow

View tomorrow's local forecast for Walnut Creek together with a detailed 5 day weather outlook showing precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Walnut Creek area and around Contra Costa county, California.
Updated: Wed Sep 9th 2026 11:15 PM PDT
Walnut Creek, CA Weather – 9-9 – Overcast
101° / 69°
Overcast
Walnut Creek, CA Weather – 9-10 – Sunny
95° / 69°

Weather Tomorrow

Sunny
Walnut Creek could see a sunny day with daytime highs of 95°F and nighttime lows near 69°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 22.4mph at 7 PM. The air will be relatively dry with average humidity levels below 30%, the maximum being 53% at 11 PM and 15% being its lowest at 1 PM. Barometric pressure is its highest of 29.95inHg at 12 AM, a lowest point of 29.85inHg at 5 PM with an avg 29.91inHg.
Walnut Creek, CA Weather – 9-11 – Sunny
84° / 62°
Sunny
Walnut Creek may see a sunny day, with daytime highs of 84°F and overnight lows near 62°F. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 11mph on average and gusts of 19mph at 6 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 77% at 7 AM and 30% being its lowest at 3 PM. Barometric pressure is its highest of 29.9inHg at 10 AM, a lowest point of 29.8inHg at 5 PM with an avg 29.86inHg.
Walnut Creek, CA Weather – 9-12 – Sunny
78° / 58°
Sunny
In Walnut Creek, it will be sunny with highs near 78°F and lows around 58°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 14mph on average and gusts of 20.6mph at 6 PM. Humidity levels should be comfortable, sitting around 51% on average, the maximum being 77% at 7 AM and 26% being its lowest at 1 PM. Barometric pressure is its highest of 29.96inHg at 9 PM, a lowest point of 29.83inHg at 12 AM with an avg 29.89inHg.
Walnut Creek, CA Weather – 9-13 – Sunny
84° / 57°
Sunny
Walnut Creek could see sunshine with daytime highs of 84°F and nighttime lows near 57°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 10mph and gusts of 18.6mph at 5 PM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 68% at 6 AM and 12% being its lowest at 4 PM. Barometric pressure is its highest of 29.99inHg at 8 AM, a lowest point of 29.83inHg at 5 PM with an avg 29.92inHg.
Walnut Creek, CA Weather – 9-14 – Sunny
86° / 62°
Sunny
Walnut Creek is set for sunshine with temperatures peaking at 86°F and dipping to 62°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 9mph and gusts of 11mph at 5 PM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 60% at 6 AM and 17% being its lowest at 5 PM. Barometric pressure is its highest of 29.87inHg at 10 AM, a lowest point of 29.78inHg at 5 PM with an avg 29.83inHg.

Currently

Clear 81°F
29.95 inHg.
Barometer
21%
Humidity
SW 8.3 mph
Wind
Clear

5 Day Forecast Nearby

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