Tracking an Impactful Storm System Across the Western and Central U.S. This Week

A Pacific storm will bring mountain snow, rain, and strong winds to the Pacific Northwest. This storm will then push into the Central U.S., bringing an impactful winter storm over the Upper Midwest Tuesday through Wednesday. Severe thunderstorms are expected in the Central U.S, as well as a multi-day heavy rain and flooding event Wednesday through Friday from the Ohio Valley the Mid South. Read More >

Current conditions at

Mt. Diablo (SJS02)

Lat: 37.881698°NLon: 121.914155°WElev: 3849.0ft.

33°F

1°C

Humidity	99%
Wind Speed	WNW 10 MPH
Barometer	NA
Dewpoint	33°F (1°C)
Visibility	NA
Wind Chill	25°F (-4°C)
Last update	31 Mar 11:55 PM PDT

More Information:

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

Extended Forecast for

4 Miles S Clayton CA

Tonight
Low: 37 °F
Chance Rain
Tuesday
High: 40 °F
Chance
T-storms and
Breezy
Tuesday Night
Low: 34 °F
Partly Cloudy
and Breezy
then Clear
Wednesday
High: 49 °F
Sunny
Wednesday Night
Low: 37 °F
Partly Cloudy
Thursday
High: 50 °F
Sunny
Thursday Night
Low: 39 °F
Mostly Clear
Friday
High: 56 °F
Sunny
Friday Night
Low: 41 °F
Mostly Clear

Detailed Forecast

Tonight

A 30 percent chance of rain. Mostly cloudy, with a low around 37. West southwest wind around 15 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.

Tuesday

A chance of rain before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of rain after 2pm. Cloudy, then gradually becoming mostly sunny, with a steady temperature around 40. Breezy, with a west wind 16 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Mostly clear, with a low around 34. Breezy, with a northwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 36 mph.

Wednesday

Sunny, with a high near 49. West wind around 10 mph, with gusts as high as 22 mph.

Wednesday Night

Partly cloudy, with a low around 37. Southwest wind around 14 mph, with gusts as high as 26 mph.

Thursday

Sunny, with a high near 50.

Thursday Night

Mostly clear, with a low around 39.

Friday

Sunny, with a high near 56.

Friday Night

Mostly clear, with a low around 41.