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: Fri Sep 4th 2026 10:15 PM PDT
Walnut Creek, CA Weather – 9-4 – Sunny
78° / 55°
Sunny
Daytime highs will reach 78°F with lows dropping to 55°F in Walnut Creek, where it will be sunny. There might be light rainfall having a 17% chance with an estimated 0.01in. Winds will be light at 10mph and gusts of 14.2mph at 11 PM. The humidity will be on the higher side, averaging about 68%, the maximum being 66% at 11 PM and 66% being its lowest at 11 PM. Barometric pressure is its highest of 29.94inHg at 11 PM, a lowest point of 29.94inHg at 11 PM with an avg 29.94inHg.
Walnut Creek, CA Weather – 9-5 – Sunny
79° / 54°

Weather Tomorrow

Sunny
Walnut Creek could see sunshine with daytime highs of 79°F and nighttime lows near 54°F. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 12mph on average and gusts of 17.9mph at 4 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 79% at 3 AM and 25% being its lowest at 3 PM. Barometric pressure is its highest of 29.96inHg at 8 AM, a lowest point of 29.89inHg at 5 PM with an avg 29.93inHg.
Walnut Creek, CA Weather – 9-6 – Sunny
76° / 57°
Sunny
A sunny day is in the forecast for Walnut Creek, with a high of 76°F and a low of 57°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 12mph on average and gusts of 16.2mph at 10 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 82% at 7 AM and 28% being its lowest at 2 PM. Barometric pressure is its highest of 29.94inHg at 8 AM, a lowest point of 29.89inHg at 5 PM with an avg 29.92inHg.
Walnut Creek, CA Weather – 9-7 – Sunny
85° / 56°
Sunny
Highs will reach 85°F with lows near 56°F in Walnut Creek, where a sunny day is. There's a very small chance of rainfall, only about 1%. Winds will be light at 6mph and gusts of 12.1mph at 12 AM. Humidity levels should be comfortable, sitting around 50% on average, the maximum being 84% at 6 AM and 16% being its lowest at 6 PM. Barometric pressure is its highest of 30inHg at 8 AM, a lowest point of 29.86inHg at 5 PM with an avg 29.93inHg.
Walnut Creek, CA Weather – 9-8 – Overcast
85° / 63°
Overcast
In Walnut Creek, skies will be overcast with highs near 85°F and lows around 63°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 10mph and gusts of 16.8mph at 8 PM. Humidity levels should be comfortable, sitting around 39% on average, the maximum being 64% at 11 PM and 22% being its lowest at 2 PM. Barometric pressure is its highest of 29.95inHg at 10 AM, a lowest point of 29.88inHg at 4 PM with an avg 29.91inHg.
Walnut Creek, CA Weather – 9-9 – Overcast
75° / 60°
Overcast
In Walnut Creek, overcast is likely with a high near 75°F and a low around 60°F. There might be light rainfall having a 12% chance with an estimated 0in. Winds will be light at 8mph and gusts of 13.4mph at 11 AM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 77% at 4 AM and 33% being its lowest at 5 PM. Barometric pressure is its highest of 30.05inHg at 2 PM, a lowest point of 29.95inHg at 12 AM with an avg 30.01inHg.

Currently

Clear 59°F
29.95 inHg.
Barometer
64%
Humidity
SW 12.6 mph
Wind
Clear

5 Day Forecast Nearby

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