Hourly Weather Forecast - Castro Valley, CA

12 AM
49°F
0%
7mph
WSW
Mostly Cloudy
Humidity
93%
Feels like
46°F
Dew Point
47°F
1 AM
49°F
0%
7mph
WSW
Mostly Cloudy
Humidity
93%
Feels like
46°F
Dew Point
47°F
2 AM
48°F
0%
7mph
WSW
Mostly Cloudy
Humidity
93%
Feels like
45°F
Dew Point
47°F
3 AM
48°F
0%
7mph
WSW
Mostly Cloudy
Humidity
93%
Feels like
45°F
Dew Point
46°F
4 AM
48°F
0%
7mph
WSW
Mostly Cloudy
Humidity
92%
Feels like
45°F
Dew Point
46°F
5 AM
48°F
0%
7mph
WSW
Mostly Cloudy
Humidity
91%
Feels like
45°F
Dew Point
46°F
6 AM
49°F
10%
7mph
WSW
Partly Cloudy
Humidity
91%
Feels like
46°F
Dew Point
46°F
6:35 AM
7 AM
51°F
10%
7mph
W
Partly Cloudy
Humidity
89%
Feels like
51°F
Dew Point
47°F
8 AM
53°F
10%
8mph
W
Partly Cloudy
Humidity
84%
Feels like
53°F
Dew Point
49°F
9 AM
56°F
10%
9mph
WNW
Partly Cloudy
Humidity
79%
Feels like
56°F
Dew Point
49°F
10 AM
59°F
10%
10mph
WNW
Partly Cloudy
Humidity
72%
Feels like
59°F
Dew Point
50°F
11 AM
61°F
10%
11mph
WNW
Partly Cloudy
Humidity
65%
Feels like
61°F
Dew Point
49°F
12 PM
64°F
10%
11mph
WNW
Partly Cloudy
Humidity
60%
Feels like
64°F
Dew Point
49°F
1 PM
65°F
10%
12mph
WNW
Partly Cloudy
Humidity
56%
Feels like
65°F
Dew Point
49°F
2 PM
65°F
10%
13mph
WNW
Partly Cloudy
Humidity
54%
Feels like
65°F
Dew Point
48°F
3 PM
64°F
10%
13mph
WNW
Partly Cloudy
Humidity
54%
Feels like
64°F
Dew Point
47°F
4 PM
62°F
10%
13mph
WNW
Partly Cloudy
Humidity
56%
Feels like
62°F
Dew Point
46°F
5 PM
60°F
10%
12mph
WNW
Mostly Sunny
Humidity
61%
Feels like
60°F
Dew Point
46°F
6 PM
57°F
0%
10mph
WNW
Mostly Sunny
Humidity
67%
Feels like
57°F
Dew Point
46°F
6:04 PM
7 PM
55°F
0%
9mph
WNW
Clear
Humidity
71%
Feels like
55°F
Dew Point
45°F
8 PM
53°F
0%
8mph
WNW
Clear
Humidity
73%
Feels like
53°F
Dew Point
44°F
9 PM
51°F
0%
7mph
WNW
Clear
Humidity
75%
Feels like
51°F
Dew Point
44°F
10 PM
50°F
0%
7mph
WNW
Clear
Humidity
77%
Feels like
50°F
Dew Point
43°F
11 PM
49°F
0%
6mph
WNW
Clear
Humidity
79%
Feels like
46°F
Dew Point
43°F

Snow and Ice Accumulations through Tuesday AM

Wintry Disturbance Bisects U.S. Mid-Latitudes

A wintry disturbance will bring icing and light snow from the central Plains today through the Northeast on Tuesday.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for February 26, 2026

Widespread Drought Degradation For South, Southeast; Mixed Results Elsewhere

Debris flies through the air as howling winds accompanied by a line of storms approach the old Tarrant County Courthouse in downtown Fort Worth, Texas, on March 2, 2023. (Tom Fox/The Dallas Morning News via AP)

Lightning Season Rapidly Approaching: Best Safety Practices

Rocky Mountain National Park at day in December. (NPS Natural Resources/Wikimedia Commons)

Snowmelt and Flooding

U.S. Route 52 near St. Donatus between Bellevue and Dubuque, Iowa. (Tony Webster from Portland, Oregon)

Winter Weather Driving Safety Tips

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