
Pacific Storm System Across the West; Fire Weather Concerns in the Southeast
A Pacific storm system will bring strong winds and low elevation rain to much of the West Coast, and heavy high elevation mountain snow to the Sierra-Nevada through Wednesday. Fire weather concerns will continue into Tuesday across the Mid-South and Southeast as gusty winds and dry conditions persist. Read More >
Current conditions at
SJSU - Mount Diablo Summit Museum Rooftop (SJS02)
Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.NA
41°F
5°C
| Humidity | 99% |
| Wind Speed | SSW 6 MPH |
| Barometer | NA |
| Dewpoint | 41°F (5°C) |
| Visibility | NA |
| Wind Chill | 37°F (3°C) |
| Last update | 21 Apr 01:20 AM PDT |
Extended Forecast for
4 Miles SSE Clayton CA
Overnight

Low: 45 °F
Rain
Tuesday

High: 45 °F
Showers
Tuesday Night

Low: 42 °F
Chance Rain
Wednesday

High: 52 °F
Chance Rain
Wednesday Night

Low: 44 °F
Mostly Clear
Thursday

High: 58 °F
Sunny
Thursday Night

Low: 47 °F
Partly Cloudy
Friday

High: 60 °F
Mostly Sunny
Friday Night

Low: 49 °F
Partly Cloudy
Detailed Forecast
Overnight
Rain. Low around 45. South southwest wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers and thunderstorms, mainly before 4pm, then rain likely and possibly a thunderstorm after 5pm. Steady temperature around 45. Southwest wind 10 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of rain before 11pm, then a chance of rain after 2am. Mostly cloudy, with a low around 42. Southwest wind 11 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 30 percent chance of rain, mainly before 11am. Mostly sunny, with a high near 52. West wind 9 to 11 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly clear, with a low around 44. West southwest wind around 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 58.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 59.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
4 Miles SSE Clayton CA
37.87°N 121.92°W (Elev. 2818 ft)
37.87°N 121.92°W (Elev. 2818 ft)
12:31 am PDT Apr 21, 2026
2am PDT Apr 21, 2026-6pm PDT Apr 27, 2026


