National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

58°F

14°C

Humidity 15%
Wind Speed N 8 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 16 Jan 05:05 PM PST
Extended Forecast for

3 Miles NNE San Ramon CA

  • Tonight

    Tonight: Mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64. Light northeast wind.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 42. Calm wind.
Saturday
Mostly sunny, with a high near 64. Calm wind becoming north northeast around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 43. Calm wind.
Sunday
Mostly sunny, with a high near 64. Light northeast wind.
Sunday Night
Mostly clear, with a low around 42. Calm wind.
M.L.King Day
Sunny, with a high near 63.
Monday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 39.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 62.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Thursday
Areas of fog. Otherwise, mostly sunny, with a high near 60.
Thursday Night
Patchy fog. Otherwise, partly cloudy, with a low around 44.
Friday
Areas of fog. Otherwise, mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE San Ramon CA
 37.8°N 121.93°W (Elev. 640 ft)
Last Update:
12:26 pm PST Jan 16, 2026
Forecast Valid:
5pm PST Jan 16, 2026-6pm PST Jan 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation