Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Hazardous Weather Conditions

Cold Weather Advisory in effect from January 12, 01:00 AM PST until January 12, 09:00 AM PST

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

52°F

11°C

Humidity	29%
Wind Speed	N 10 MPH
Barometer	NA
Dewpoint	20°F (-7°C)
Visibility	NA
Last update	12 Jan 05:05 AM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles SSE Clayton CA

Cold Weather Advisory until January 12, 09:00am

Click here for hazard details and duration

Cold Weather Advisory

Cold Weather Advisory until January 12, 09:00am
NOW until 9:00am Mon
Cold Weather Advisory
Overnight
Low: 41 °F
Clear
Monday
High: 56 °F
Sunny
Monday Night
Low: 40 °F
Mostly Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 59 °F
Sunny
Wednesday Night
Low: 42 °F
Mostly Clear
Thursday
High: 61 °F
Sunny