California · NWS MTR office

Walnut Creek, CA weather

It is 50°F at LAS TRAMPAS as of Oct 28, 4:28 AM PDT. Overnight: Mostly Clear, low near 44°F. Forecast from the National Weather Service, issued Oct 28, 2:16 AM PDT.

Updated Oct 28, 5:20 AM PDT (snapshot)

Current conditions

Temperature

50°F

Mostly Clear

Wind

E 12 mph

Humidity 89% · dew point 47°F

Pressure · visibility

—

Visibility —

Observed at LAS TRAMPAS (LTRC1), Oct 28, 4:28 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Walnut Creek forecast zone right now.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near Walnut Creek:

  • Coastal Flood Advisory (2)

From the alert snapshot of Oct 28, 2026, 8:14 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Walnut Creek (local time)
TimeTempForecastPrecip. chanceWind
Wed 5 AM45°FMostly Clear0%ESE 2 mph
Wed 6 AM45°FSunny0%E 2 mph
Wed 7 AM45°FSunny0%ESE 2 mph
Wed 8 AM45°FSunny0%ESE 2 mph
Wed 9 AM52°FSunny0%E 2 mph
Wed 10 AM56°FSunny0%NNE 2 mph
Wed 11 AM60°FSunny0%NNE 5 mph
Wed 12 PM64°FSunny0%N 5 mph
Wed 1 PM67°FSunny0%N 5 mph
Wed 2 PM69°FMostly Sunny0%N 5 mph
Wed 3 PM70°FSunny0%N 5 mph
Wed 4 PM70°FMostly Sunny0%NNW 5 mph
Wed 5 PM69°FMostly Sunny0%NW 3 mph
Wed 6 PM66°FMostly Clear0%WSW 2 mph
Wed 7 PM62°FPartly Cloudy0%SW 2 mph
Wed 8 PM57°FPartly Cloudy0%S 2 mph
Wed 9 PM55°FMostly Clear0%S 2 mph
Wed 10 PM53°FPartly Cloudy0%S 2 mph
Wed 11 PM52°FPartly Cloudy0%S 2 mph
Thu 12 AM51°FMostly Cloudy0%S 2 mph
Thu 1 AM51°FMostly Cloudy0%S 1 mph
Thu 2 AM50°FMostly Cloudy0%S 1 mph
Thu 3 AM48°FMostly Cloudy0%S 1 mph
Thu 4 AM48°FMostly Cloudy0%S 1 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Walnut Creek can differ.

7-day forecast

Overnight

Low 44°F

Mostly clear, with a low around 44. East southeast wind around 2 mph.

Wednesday

High 70°F·Low 45°F

Sunny, with a high near 70. North northeast wind around 5 mph.

Wednesday Night: Partly cloudy. Low around 45, with temperatures rising to around 48 overnight. South southwest wind around 2 mph.

Thursday

High 68°F·Low 47°F

Mostly cloudy, with a high near 68. North northwest wind around 3 mph.

Thursday Night: Mostly cloudy, with a low around 47. Southwest wind around 3 mph.

Friday

High 67°F·Low 44°F

Mostly sunny, with a high near 67.

Friday Night: Partly cloudy, with a low around 44.

Saturday

High 63°F·Low 43°F

Partly sunny, with a high near 63.

Saturday Night: Partly cloudy, with a low around 43.

Sunday

High 66°F·Low 45°F

Sunny, with a high near 66.

Sunday Night: Mostly clear, with a low around 45.

Monday

High 69°F·Low 48°F

Mostly sunny, with a high near 69.

Monday Night: Mostly cloudy, with a low around 48.

Tuesday

High 70°F

A chance of rain after 10am. Mostly sunny, with a high near 70.

Nearby cities

Larger cities in the area

Other cities in Contra Costa County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Walnut Creek is served by the National Weather Service MTR forecast office, forecast zone CAZ510, county zone CAC013.
Location used
The Census Bureau's internal point for Walnut Creek (37.9027, -122.0405), in Contra Costa County. Population: 70,817 (2024 estimate), number 124 of the 296 California cities on this site.
Radar
Nearest NWS radar: KDAX. View it on radar.weather.gov.

On Amazon

Weather-ready picks

As an Amazon Associate I earn from qualifying purchases.

Home & kitchen LEVOIT Air Purifier An air purifier for smoky or high-pollen days indoors. View on Amazon → Men’s fashion Hanes Fleece Hooded Sweatshirt A warm hoodie for chilly mornings. View on Amazon → Fitness & outdoors Stanley Quencher H2.0 Tumbler A big tumbler for long commutes and outdoor days. View on Amazon → Fitness & outdoors LifeStraw Personal Water Filter A personal water filter worth adding to an emergency kit. View on Amazon →

Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/37.9027,-122.0405 (forecast issued Oct 28, 2:16 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

More California cities