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Winter is right around the corner, and it could be snowy. Read AccuWeather's 2025-26 U.S. winter forecast. Chevron right

Castro Valley, CA

62°F
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Castro Valley

California

62°
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Castro Valley, CA Weather
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5 AM

62°
RealFeel® 60°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 47%
Chevron down
Showers

WindW 5 mph

Air QualityFair

Wind Gusts9 mph

Humidity92%

Indoor Humidity75% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling1900 ft

6 AM

62°
RealFeel® 61°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 43%
Chevron down
Showers

WindW 5 mph

Air QualityFair

Wind Gusts9 mph

Humidity89%

Indoor Humidity72% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling1900 ft

7 AM

62°
RealFeel® 62°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 41%
Chevron down
Mostly cloudy

WindWNW 5 mph

Air QualityFair

Wind Gusts10 mph

Humidity90%

Indoor Humidity72% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover83%

Visibility10 mi

Cloud Ceiling1900 ft

8 AM

65°
RealFeel® 65°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 20%
Chevron down
Cloudy

RealFeel Shade™65°

WindW 5 mph

Air QualityFair

Max UV Index0.2 (Low)

Wind Gusts6 mph

Humidity87%

Indoor Humidity77% (Slightly Humid)

Dew Point61° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling1500 ft

9 AM

65°
RealFeel® 64°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 20%
Chevron down
Mostly cloudy

RealFeel Shade™64°

WindW 6 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts7 mph

Humidity84%

Indoor Humidity76% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover78%

Visibility10 mi

Cloud Ceiling1600 ft

10 AM

66°
RealFeel® 65°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 20%
Chevron down
Intermittent clouds

RealFeel Shade™63°

WindWNW 7 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts8 mph

Humidity80%

Indoor Humidity75% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover66%

Visibility10 mi

Cloud Ceiling1800 ft

11 AM

67°
RealFeel® 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 20%
Chevron down
Intermittent clouds

RealFeel Shade™64°

WindWNW 7 mph

Air QualityFair

Max UV Index2.0 (Low)

Wind Gusts8 mph

Humidity76%

Indoor Humidity73% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover54%

Visibility10 mi

Cloud Ceiling2000 ft

12 PM

68°
RealFeel® 71°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 20%
Chevron down
Partly sunny

RealFeel Shade™65°

WindWNW 8 mph

Air QualityFair

Max UV Index4.4 (Moderate)

Wind Gusts9 mph

Humidity73%

Indoor Humidity72% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover42%

Visibility10 mi

Cloud Ceiling30000 ft

1 PM

68°
RealFeel® 72°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 15%
Chevron down
Partly sunny

RealFeel Shade™65°

WindWNW 8 mph

Air QualityFair

Max UV Index4.7 (Moderate)

Wind Gusts12 mph

Humidity70%

Indoor Humidity70% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover30%

Visibility10 mi

Cloud Ceiling30000 ft

2 PM

68°
RealFeel® 71°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™65°

WindWNW 10 mph

Air QualityFair

Max UV Index4.4 (Moderate)

Wind Gusts15 mph

Humidity67%

Indoor Humidity67% (Slightly Humid)

Dew Point57° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

70°
RealFeel® 71°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™66°

WindW 10 mph

Air QualityFair

Max UV Index3.7 (Moderate)

Wind Gusts16 mph

Humidity62%

Indoor Humidity62% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

69°
RealFeel® 69°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™66°

WindW 10 mph

Air QualityFair

Max UV Index2.6 (Moderate)

Wind Gusts17 mph

Humidity63%

Indoor Humidity63% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

68°
RealFeel® 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™65°

WindW 10 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts18 mph

Humidity65%

Indoor Humidity65% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

67°
RealFeel® 64°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™64°

WindW 10 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts16 mph

Humidity68%

Indoor Humidity65% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

64°
RealFeel® 61°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 6%
Chevron down
Partly cloudy

WindW 9 mph

Air QualityExcellent

Wind Gusts15 mph

Humidity75%

Indoor Humidity66% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

63°
RealFeel® 60°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 7%
Chevron down
Intermittent clouds

WindW 8 mph

Air QualityFair

Wind Gusts13 mph

Humidity80%

Indoor Humidity66% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling14700 ft

9 PM

62°
RealFeel® 59°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 7%
Chevron down
Intermittent clouds

WindWSW 8 mph

Air QualityFair

Wind Gusts12 mph

Humidity83%

Indoor Humidity66% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling12100 ft

10 PM

62°
RealFeel® 60°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 7%
Chevron down
Intermittent clouds

WindWSW 7 mph

Air QualityFair

Wind Gusts9 mph

Humidity81%

Indoor Humidity66% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover61%

Visibility10 mi

Cloud Ceiling9600 ft

11 PM

62°
RealFeel® 60°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 7%
Chevron down
Intermittent clouds

WindWSW 7 mph

Air QualityFair

Wind Gusts8 mph

Humidity82%

Indoor Humidity66% (Slightly Humid)

Dew Point56° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover50%

Visibility10 mi

Cloud Ceiling30000 ft

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World North America United States California Castro Valley

Weather Near Castro Valley:

  • Oakland, CA
  • San Francisco, CA
  • San Jose, CA
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