See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:56
Sunrise
19:08
Sunset
Moon
Waxing Crescent
12:46
Moonrise
21:26
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Walnut Creek.
Resources
UV Index
Humidity
Weather in Walnut Creek today, September 16, 2026
Expect a mostly clear day in Walnut Creek on September 16, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled. Expect a brighter morning, with limited cloud around 28% by 09:00. Conditions start on a settled note.
Expect highs of 20°C and cooler readings close to 14°C. Moisture in the air spans 65%-96%, with the highest values around 03:00. Expect gentle winds, highest near 11:00 at 8.6 km/h.
Through the afternoon cloud remains the main feature, with cover near 66% around 22:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 14.8 km, briefly nearer 12.4 km. Daylight runs from 06:56 to 19:08, lasting 12 hours 11 minutes of sunlight today.
Taken together, settled sunshine in Walnut Creek on September 16, 2026 makes outdoor timing easier, with highs near 20°C.
Frequently asked questions about weather in Walnut Creek
How warm does it get in Walnut Creek?
The warmest month in Walnut Creek is August, with average high temperatures of 29°C. The average temperature during this period is around 20°C.
How cold does it get in Walnut Creek?
The coldest month in Walnut Creek is December, with average low temperatures of 7°C. The average temperature during this period is around 10°C.
What is the wettest time of year in Walnut Creek?
The wettest month in Walnut Creek is January, with an average of 108mm of precipitation.
What is the driest time of year in Walnut Creek?
The driest month in Walnut Creek is July, with an average of 0mm of precipitation.
Explore more weather forecasts
- Pleasant Hill, California
- New York City, New York
- Lafayette, California
- Los Angeles, California
- Alamo, California
- Brooklyn, New York
- Concord, California
- Chicago, Illinois
- Moraga, California
- Houston, Texas
- Orinda, California
- Queens, New York
- Danville, California
- Phoenix, Arizona
- Clayton, California
- Philadelphia, Pennsylvania
