Hourly Weather Forecast - Castro Valley, CA

6 AM
53°F
0%
5mph
WSW
Cloudy
Humidity
91%
Feels like
53°F
Dew Point
51°F
6:39 AM
7 AM
55°F
0%
5mph
WSW
Mostly Cloudy
Humidity
90%
Feels like
55°F
Dew Point
52°F
8 AM
56°F
0%
5mph
WSW
Cloudy
Humidity
86%
Feels like
56°F
Dew Point
52°F
9 AM
58°F
0%
6mph
WSW
Mostly Cloudy
Humidity
81%
Feels like
58°F
Dew Point
53°F
10 AM
60°F
0%
6mph
WSW
Mostly Cloudy
Humidity
77%
Feels like
60°F
Dew Point
53°F
11 AM
62°F
0%
7mph
WSW
Mostly Cloudy
Humidity
71%
Feels like
62°F
Dew Point
53°F
12 PM
64°F
0%
8mph
WSW
Mostly Cloudy
Humidity
66%
Feels like
64°F
Dew Point
52°F
1 PM
65°F
0%
9mph
W
Mostly Cloudy
Humidity
64%
Feels like
65°F
Dew Point
52°F
2 PM
65°F
0%
10mph
W
Partly Cloudy
Humidity
63%
Feels like
65°F
Dew Point
52°F
3 PM
63°F
0%
10mph
W
Partly Cloudy
Humidity
63%
Feels like
63°F
Dew Point
51°F
4 PM
61°F
0%
10mph
W
Partly Cloudy
Humidity
66%
Feels like
61°F
Dew Point
50°F
5 PM
59°F
0%
9mph
W
Partly Cloudy
Humidity
72%
Feels like
59°F
Dew Point
50°F
6 PM
56°F
0%
8mph
W
Mostly Cloudy
Humidity
77%
Feels like
56°F
Dew Point
49°F
6:01 PM
7 PM
55°F
0%
7mph
W
Mostly Cloudy
Humidity
81%
Feels like
55°F
Dew Point
49°F
8 PM
54°F
0%
6mph
WSW
Mostly Cloudy
Humidity
84%
Feels like
54°F
Dew Point
49°F
9 PM
53°F
0%
6mph
WSW
Partly Cloudy
Humidity
86%
Feels like
53°F
Dew Point
49°F
10 PM
52°F
10%
6mph
SW
Partly Cloudy
Humidity
89%
Feels like
52°F
Dew Point
49°F
11 PM
51°F
0%
5mph
SW
Mostly Cloudy
Humidity
91%
Feels like
51°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide