Hourly Weather Forecast - Castro Valley, CA

12 AM
48°F
0%
6mph
NW
Clear
Humidity
82%
Feels like
45°F
Dew Point
42°F
1 AM
47°F
0%
5mph
NW
Clear
Humidity
83%
Feels like
44°F
Dew Point
42°F
2 AM
46°F
0%
5mph
NW
Clear
Humidity
84%
Feels like
43°F
Dew Point
41°F
3 AM
45°F
0%
5mph
NW
Clear
Humidity
84%
Feels like
42°F
Dew Point
41°F
4 AM
44°F
0%
5mph
NW
Mostly Clear
Humidity
84%
Feels like
42°F
Dew Point
40°F
5 AM
44°F
0%
5mph
NNW
Mostly Clear
Humidity
84%
Feels like
41°F
Dew Point
40°F
6 AM
44°F
0%
6mph
NNW
Mostly Clear
Humidity
83%
Feels like
41°F
Dew Point
40°F
6:34 AM
7 AM
46°F
0%
6mph
NNW
Mostly Sunny
Humidity
78%
Feels like
43°F
Dew Point
40°F
8 AM
50°F
0%
6mph
NNW
Mostly Sunny
Humidity
71%
Feels like
50°F
Dew Point
41°F
9 AM
55°F
0%
8mph
NNW
Mostly Sunny
Humidity
61%
Feels like
55°F
Dew Point
42°F
10 AM
59°F
0%
9mph
NW
Mostly Sunny
Humidity
52%
Feels like
59°F
Dew Point
41°F
11 AM
62°F
0%
9mph
NNW
Mostly Sunny
Humidity
45%
Feels like
62°F
Dew Point
41°F
12 PM
65°F
0%
10mph
NNW
Sunny
Humidity
41%
Feels like
65°F
Dew Point
41°F
1 PM
67°F
0%
11mph
NW
Sunny
Humidity
39%
Feels like
67°F
Dew Point
41°F
2 PM
67°F
0%
11mph
NW
Sunny
Humidity
37%
Feels like
67°F
Dew Point
41°F
3 PM
67°F
0%
11mph
NW
Mostly Sunny
Humidity
38%
Feels like
67°F
Dew Point
40°F
4 PM
65°F
0%
11mph
NW
Partly Cloudy
Humidity
40%
Feels like
65°F
Dew Point
40°F
5 PM
62°F
0%
10mph
NW
Partly Cloudy
Humidity
46%
Feels like
62°F
Dew Point
42°F
6 PM
60°F
0%
8mph
WNW
Partly Cloudy
Humidity
54%
Feels like
60°F
Dew Point
43°F
6:05 PM
7 PM
57°F
0%
8mph
NW
Mostly Clear
Humidity
60%
Feels like
57°F
Dew Point
44°F
8 PM
55°F
0%
7mph
NW
Mostly Clear
Humidity
65%
Feels like
55°F
Dew Point
44°F
9 PM
53°F
0%
7mph
NW
Partly Cloudy
Humidity
69%
Feels like
53°F
Dew Point
43°F
10 PM
51°F
0%
6mph
NW
Partly Cloudy
Humidity
73%
Feels like
51°F
Dew Point
43°F
11 PM
50°F
0%
7mph
NNW
Mostly Cloudy
Humidity
75%
Feels like
50°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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