Hourly Weather Forecast - Castro Valley, CA

12 AM
51°F
0%
5mph
SSW
Mostly Cloudy
Humidity
94%
Feels like
51°F
Dew Point
49°F
1 AM
51°F
10%
5mph
S
Mostly Cloudy
Humidity
94%
Feels like
51°F
Dew Point
49°F
2 AM
51°F
20%
5mph
S
Mostly Cloudy
Humidity
94%
Feels like
51°F
Dew Point
49°F
3 AM
50°F
10%
5mph
S
Mostly Cloudy
Humidity
94%
Feels like
50°F
Dew Point
49°F
4 AM
51°F
10%
5mph
S
Mostly Cloudy
Humidity
93%
Feels like
51°F
Dew Point
49°F
5 AM
51°F
10%
5mph
S
Mostly Cloudy
Humidity
93%
Feels like
51°F
Dew Point
49°F
6 AM
51°F
10%
5mph
SSE
Mostly Cloudy
Humidity
92%
Feels like
51°F
Dew Point
49°F
6:38 AM
7 AM
52°F
0%
5mph
SE
Mostly Cloudy
Humidity
89%
Feels like
52°F
Dew Point
49°F
8 AM
55°F
0%
5mph
SSE
Mostly Cloudy
Humidity
85%
Feels like
55°F
Dew Point
50°F
9 AM
58°F
0%
5mph
SSW
Partly Cloudy
Humidity
78%
Feels like
58°F
Dew Point
51°F
10 AM
60°F
0%
5mph
SW
Partly Cloudy
Humidity
72%
Feels like
60°F
Dew Point
51°F
11 AM
62°F
0%
5mph
WSW
Partly Cloudy
Humidity
66%
Feels like
62°F
Dew Point
50°F
12 PM
64°F
0%
6mph
W
Partly Cloudy
Humidity
62%
Feels like
64°F
Dew Point
50°F
1 PM
65°F
10%
6mph
WNW
Partly Cloudy
Humidity
59%
Feels like
65°F
Dew Point
50°F
2 PM
65°F
10%
7mph
WNW
Partly Cloudy
Humidity
58%
Feels like
65°F
Dew Point
50°F
3 PM
64°F
10%
8mph
WNW
Partly Cloudy
Humidity
59%
Feels like
64°F
Dew Point
50°F
4 PM
63°F
0%
8mph
WNW
Partly Cloudy
Humidity
61%
Feels like
63°F
Dew Point
49°F
5 PM
61°F
0%
8mph
WNW
Partly Cloudy
Humidity
67%
Feels like
61°F
Dew Point
50°F
6 PM
58°F
0%
7mph
WNW
Mostly Sunny
Humidity
73%
Feels like
58°F
Dew Point
50°F
6:02 PM
7 PM
56°F
0%
6mph
WNW
Mostly Clear
Humidity
78%
Feels like
56°F
Dew Point
50°F
8 PM
55°F
0%
6mph
WNW
Mostly Clear
Humidity
83%
Feels like
55°F
Dew Point
49°F
9 PM
53°F
0%
5mph
WNW
Mostly Clear
Humidity
87%
Feels like
53°F
Dew Point
49°F
10 PM
51°F
0%
5mph
WNW
Hazy
Humidity
91%
Feels like
51°F
Dew Point
49°F
11 PM
50°F
0%
4mph
W
Partly Cloudy
Humidity
94%
Feels like
50°F
Dew Point
49°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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