Critical Fire Weather Conditions Continue; Pacific Storm to Bring Heavy Snow to the Sierra-Nevada

Critical fire weather conditions are forecast for the Southern Plains and portions of Florida through Thursday, as gusty winds and dry conditions return to the region. A Pacific storm system will bring strong winds and low elevation rain to much of the West Coast and central Great Basin, and heavy high elevation mountain snow to the Sierra-Nevada through Wednesday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

41°F

5°C

Humidity	99%
Wind Speed	S 9 MPH
Barometer	NA
Dewpoint	41°F (5°C)
Visibility	NA
Wind Chill	35°F (2°C)
Last update	21 Apr 09:50 AM PDT

More Information:

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

Extended Forecast for

4 Miles S Clayton CA

Today
High: 44 °F
Showers
Tonight
Low: 42 °F
Chance
Showers
Wednesday
High: 51 °F
Chance
Showers then
Slight Chance
Showers
Wednesday Night
Low: 44 °F
Mostly Clear
Thursday
High: 57 °F
Sunny
Thursday Night
Low: 47 °F
Partly Cloudy
Friday
High: 59 °F
Mostly Sunny
Friday Night
Low: 49 °F
Partly Cloudy
Saturday
High: 53 °F
Partly Sunny

Detailed Forecast

Today

Showers and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Steady temperature around 44. Southwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. West southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

A 50 percent chance of showers, mainly between 11am and noon. Partly sunny, with a high near 51. South southwest wind around 9 mph becoming west in the afternoon. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night

Mostly clear, with a low around 44. West wind around 9 mph, with gusts as high as 18 mph.

Thursday

Sunny, with a high near 57. West wind 6 to 8 mph becoming north northwest in the morning.

Thursday Night

Partly cloudy, with a low around 47.

Friday

Mostly sunny, with a high near 59.

Friday Night

Partly cloudy, with a low around 49.

Saturday

Partly sunny, with a high near 53.