Hourly Weather Forecast - Castro Valley, CA

10 AM
54°F
0%
4mph
SSW
Mostly Cloudy
Humidity
95%
Feels like
54°F
Dew Point
52°F
11 AM
56°F
0%
4mph
SW
Partly Cloudy
Humidity
91%
Feels like
56°F
Dew Point
53°F
12 PM
58°F
0%
4mph
WSW
Partly Cloudy
Humidity
86%
Feels like
58°F
Dew Point
53°F
1 PM
58°F
0%
5mph
WSW
Partly Cloudy
Humidity
82%
Feels like
58°F
Dew Point
53°F
2 PM
58°F
0%
5mph
WSW
Mostly Sunny
Humidity
79%
Feels like
58°F
Dew Point
52°F
3 PM
56°F
0%
5mph
W
Partly Cloudy
Humidity
81%
Feels like
56°F
Dew Point
50°F
4 PM
54°F
0%
5mph
W
Partly Cloudy
Humidity
80%
Feels like
54°F
Dew Point
48°F
4:51 PM
5 PM
51°F
0%
5mph
W
Partly Cloudy
Humidity
82%
Feels like
51°F
Dew Point
46°F
6 PM
50°F
0%
4mph
W
Partly Cloudy
Humidity
85%
Feels like
48°F
Dew Point
46°F
7 PM
49°F
0%
4mph
WSW
Mostly Cloudy
Humidity
86%
Feels like
48°F
Dew Point
45°F
8 PM
49°F
0%
4mph
WSW
Mostly Cloudy
Humidity
86%
Feels like
47°F
Dew Point
45°F
9 PM
48°F
0%
4mph
SW
Mostly Cloudy
Humidity
85%
Feels like
47°F
Dew Point
44°F
10 PM
48°F
0%
4mph
SSW
Mostly Cloudy
Humidity
86%
Feels like
46°F
Dew Point
44°F
11 PM
48°F
0%
5mph
SSW
Mostly Cloudy
Humidity
87%
Feels like
46°F
Dew Point
44°F

Forecast Peak Wind Gusts Today

High Winds, Rain, and Snow Cross the Country

A clipper moving over the Great Lakes brings rain, snow, and high winds through the Atlantic Coastline.

Rainfall and Snowfall Totals Through Friday

Atmospheric River Symptoms Repeat in the Northwest

Friday's Weather Outlook

Friday's Weather Outlook

Friday's Weather Outlook

Weekend Weather Preview

Flu Update Valid For Week Ending December 6, 2025

Weekly Flu Update: Flu Exceeds Annual Baseline

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

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