
Severe Thunderstorms and Heavy Rain in the Mississippi Valley; Critical Fire Weather in the Southern Plains
Severe thunderstorms will persist tonight across the Middle Mississippi Valley, producing damaging winds, large to very large hail and several tornadoes. Low humidity and windy conditions will continue to produce elevated to critical fire weather conditions across the southern High Plains into midweek. Read More >
Current conditions at
SJSU - Mount Diablo Summit Museum Rooftop (SJS02)
Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.NA
44°F
7°C
| Humidity | 77% |
| Wind Speed | WSW 7 MPH |
| Barometer | NA |
| Dewpoint | 37°F (3°C) |
| Visibility | NA |
| Wind Chill | 40°F (4°C) |
| Last update | 27 Apr 07:55 PM PDT |
Extended Forecast for
4 Miles SSE Clayton CA
Tonight

Low: 46 °F
Partly Cloudy
Tuesday

High: 63 °F
Sunny
Tuesday Night

Low: 51 °F
Clear
Wednesday

High: 68 °F
Sunny
Wednesday Night

Low: 50 °F
Mostly Clear
Thursday

High: 70 °F
Sunny
Thursday Night

Low: 53 °F
Mostly Clear
Friday

High: 72 °F
Sunny
Friday Night

Low: 52 °F
Partly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 46. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 63. Southwest wind 6 to 8 mph becoming north northwest in the morning.
Tuesday Night
Clear, with a low around 51. West southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 68. West wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 50. Southwest wind around 14 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 51.
Monday
A slight chance of rain. Mostly sunny, with a high near 61.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
4 Miles SSE Clayton CA
37.9°N 121.9°W (Elev. 1814 ft)
37.9°N 121.9°W (Elev. 1814 ft)
8:51 pm PDT Apr 27, 2026
11pm PDT Apr 27, 2026-6pm PDT May 4, 2026


