California · NWS MTR office

San Ramon, CA weather

It is 42°F at FW3625 San Ramon as of Oct 28, 5:10 AM PDT. Overnight: Patchy Fog, low near 44°F. Forecast from the National Weather Service, issued Oct 28, 2:16 AM PDT.

Updated Oct 28, 5:19 AM PDT (snapshot)

Current conditions

Temperature

42°F

Patchy Fog

Wind

—

Humidity 97%

Pressure · visibility

—

Visibility —

Observed at FW3625 San Ramon (F3625), Oct 28, 5:10 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the San Ramon forecast zone right now.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near San Ramon:

  • 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 San Ramon (local time)
TimeTempForecastPrecip. chanceWind
Wed 5 AM44°FPatchy Fog0%NNE 1 mph
Wed 6 AM44°FPatchy Fog0%NE 1 mph
Wed 7 AM44°FPatchy Fog0%E 1 mph
Wed 8 AM44°FPatchy Fog0%E 1 mph
Wed 9 AM49°FSunny0%E 2 mph
Wed 10 AM54°FSunny0%E 2 mph
Wed 11 AM59°FMostly Sunny0%N 3 mph
Wed 12 PM62°FSunny0%N 3 mph
Wed 1 PM65°FSunny0%N 5 mph
Wed 2 PM67°FSunny0%NNW 5 mph
Wed 3 PM67°FSunny0%NNW 5 mph
Wed 4 PM67°FSunny0%NW 5 mph
Wed 5 PM66°FSunny0%NW 3 mph
Wed 6 PM64°FMostly Clear0%WNW 1 mph
Wed 7 PM60°FMostly Clear0% 0 mph
Wed 8 PM54°FPartly Cloudy0% 0 mph
Wed 9 PM53°FPartly Cloudy0% 0 mph
Wed 10 PM51°FPartly Cloudy0% 0 mph
Wed 11 PM50°FMostly Cloudy0% 0 mph
Thu 12 AM50°FMostly Cloudy0% 0 mph
Thu 1 AM49°FMostly Cloudy0% 0 mph
Thu 2 AM49°FMostly Cloudy0% 0 mph
Thu 3 AM48°FMostly Cloudy0% 0 mph
Thu 4 AM47°FMostly Cloudy0% 0 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 San Ramon can differ.

7-day forecast

Overnight

Low 44°F

Patchy fog. Mostly clear, with a low around 44. North northeast wind around 1 mph.

Wednesday

High 68°F·Low 46°F

Patchy fog before 9am. Sunny. High near 68, with temperatures falling to around 66 in the afternoon. North northeast wind 1 to 5 mph.

Wednesday Night: Mostly cloudy, with a low around 46. West northwest wind around 1 mph.

Thursday

High 66°F·Low 46°F

Mostly cloudy, with a high near 66. West northwest wind around 2 mph.

Thursday Night: Patchy fog after 4am. Mostly cloudy, with a low around 46. West southwest wind around 1 mph.

Friday

High 64°F·Low 44°F

Patchy fog before 10am. Mostly sunny, with a high near 64.

Friday Night: Patchy fog after 3am. Partly cloudy, with a low around 44.

Saturday

High 60°F·Low 42°F

Areas of fog before 10am. Mostly cloudy, with a high near 60.

Saturday Night: Patchy fog after 4am. Partly cloudy, with a low around 42.

Sunday

High 63°F·Low 44°F

Patchy fog before 8am. Sunny, with a high near 63.

Sunday Night: Mostly clear, with a low around 44.

Monday

High 66°F·Low 47°F

Mostly sunny, with a high near 66.

Monday Night: Mostly cloudy, with a low around 47.

Tuesday

High 67°F

A chance of rain after 10am. Mostly sunny, with a high near 67.

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
San Ramon 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 San Ramon (37.7653, -121.9320), in Contra Costa County. Population: 85,924 (2024 estimate), number 98 of the 296 California cities on this site.
Radar
Nearest NWS radar: KMUX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/37.7653,-121.932 (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.

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