Friday's Hourly Weather Forecast - Castro Valley, CA

Time
12 AM
Weather Condition:
Temperature
58°
Chance of precipitation
0%
Wind
9mph
Weather Condition:Partly Cloudy
Humidity
90%
Feels like
58°
Dew Point
55°
Time
1 AM
Weather Condition:
Temperature
57°
Chance of precipitation
0%
Wind
9mph
Weather Condition:Partly Cloudy
Humidity
91%
Feels like
57°
Dew Point
55°
Time
2 AM
Weather Condition:
Temperature
57°
Chance of precipitation
0%
Wind
9mph
Weather Condition:Partly Cloudy
Humidity
92%
Feels like
57°
Dew Point
55°
Time
3 AM
Weather Condition:
Temperature
56°
Chance of precipitation
0%
Wind
9mph
Weather Condition:Partly Cloudy
Humidity
92%
Feels like
56°
Dew Point
54°
Time
4 AM
Weather Condition:
Temperature
56°
Chance of precipitation
0%
Wind
9mph
Weather Condition:Partly Cloudy
Humidity
91%
Feels like
56°
Dew Point
54°
Time
5 AM
Weather Condition:
Temperature
57°
Chance of precipitation
0%
Wind
8mph
Weather Condition:Partly Cloudy
Humidity
91%
Feels like
57°
Dew Point
54°

Today's severe weather outlook

Heightened Severe Storm Risk for the Central Plains

A low pressure system will trigger severe thunderstorms this afternoon and evening across the Central Plains.

Today's Weather Outlook

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Temperature Outlook for June through August 2026

Summer Outlook: Developing El Niño Set to Impact Drought, Wildfires Nationwide

Drought Monitor for June 18, 2026

Thirsty Midwest, Southern Plains See Drought Relief

Story Image: The differences between the Heat Index and Wet Bulb Globe Temperature are outlined in this graphic. (NOAA, NWS)

Heat Index Vs Wet Bulb Globe Temperature

Story Image via pixabay.com

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