Hourly Weather Forecast - Castro Valley, CA

12 AM
47°F
0%
6mph
ENE
Partly Cloudy
Humidity
80%
Feels like
45°F
Dew Point
41°F
1 AM
47°F
0%
6mph
NE
Partly Cloudy
Humidity
80%
Feels like
44°F
Dew Point
41°F
2 AM
46°F
0%
6mph
NE
Partly Cloudy
Humidity
80%
Feels like
43°F
Dew Point
40°F
3 AM
46°F
0%
5mph
NE
Partly Cloudy
Humidity
81%
Feels like
43°F
Dew Point
40°F
4 AM
45°F
0%
6mph
NE
Partly Cloudy
Humidity
81%
Feels like
42°F
Dew Point
40°F
5 AM
45°F
0%
5mph
NE
Partly Cloudy
Humidity
82%
Feels like
42°F
Dew Point
39°F
6 AM
44°F
0%
6mph
NE
Partly Cloudy
Humidity
83%
Feels like
41°F
Dew Point
40°F
7 AM
45°F
0%
6mph
NE
Partly Cloudy
Humidity
82%
Feels like
42°F
Dew Point
40°F
7:21 AM
8 AM
48°F
0%
5mph
NE
Partly Cloudy
Humidity
78%
Feels like
46°F
Dew Point
42°F
9 AM
53°F
0%
5mph
NE
Partly Cloudy
Humidity
71%
Feels like
53°F
Dew Point
43°F
10 AM
57°F
0%
5mph
NE
Mostly Sunny
Humidity
64%
Feels like
57°F
Dew Point
45°F
11 AM
60°F
0%
6mph
NE
Mostly Sunny
Humidity
58%
Feels like
60°F
Dew Point
46°F
12 PM
64°F
0%
6mph
NNE
Sunny
Humidity
53%
Feels like
64°F
Dew Point
46°F
1 PM
65°F
0%
6mph
N
Sunny
Humidity
50%
Feels like
65°F
Dew Point
46°F
2 PM
66°F
0%
6mph
N
Sunny
Humidity
48%
Feels like
66°F
Dew Point
46°F
3 PM
65°F
0%
6mph
N
Sunny
Humidity
49%
Feels like
65°F
Dew Point
45°F
4 PM
63°F
0%
6mph
N
Sunny
Humidity
52%
Feels like
63°F
Dew Point
45°F
5 PM
59°F
0%
5mph
N
Sunny
Humidity
58%
Feels like
59°F
Dew Point
44°F
5:16 PM
6 PM
56°F
0%
5mph
N
Clear
Humidity
64%
Feels like
56°F
Dew Point
44°F
7 PM
53°F
0%
5mph
N
Clear
Humidity
68%
Feels like
53°F
Dew Point
43°F
8 PM
52°F
0%
5mph
NNE
Clear
Humidity
71%
Feels like
52°F
Dew Point
42°F
9 PM
50°F
0%
5mph
NE
Clear
Humidity
73%
Feels like
50°F
Dew Point
42°F
10 PM
49°F
0%
5mph
ENE
Clear
Humidity
75%
Feels like
48°F
Dew Point
42°F
11 PM
48°F
0%
5mph
ENE
Clear
Humidity
76%
Feels like
46°F
Dew Point
41°F

Wednesday's Weather Outlook

Wednesday's Weather Outlook

It will be a tale of two seasons on Wednesday, with cold, wintry weather in the East and dry, spring-like weather in the West.

(Image provided by NOAA)

Polar Vortex: What Is It?

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

(Image provided by Pixabay.com)

Before a High Wind Event

Windchill chart

Dangers of Wind Chills

A snow-covered trail in Sparkill, N.Y. (H. Martinez, WeatherBug user)

Top Winter Hiking Destinations

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