Current Weather Forecast for Castro Valley

CA 94546  |   2:49pm

Weather Conditions

71°

Feels Like 71°

Sunny

53° 72°

7

UV Index

Good

Air Quality

W 16 mph

Wind

0 in

rain

Today

Sat 5/9

72°

Highest Temperature

2%

Abundant sunshine. High 72F. Winds W at 10 to 20 mph.

Tonight

Sat 5/9

53°

Lowest Temperature

24%

Partly cloudy this evening, then becoming cloudy after midnight. Low 53F. Winds WSW at 10 to 15 mph.

Tomorrow

Sun 5/10

69°

Highest Temperature

21%

Mostly cloudy early, then afternoon sunshine. High 69F. Winds WSW at 10 to 15 mph.

Next 12 Hours Next 7 Days

Next 12 Hours Forecast in Castro Valley

Hourly Weather Forecast & Temperature

3PM

1%

71°

Feels Like 71°

Sunny

W 15 mph

Wind

1014 mb

Pressure

56%

Humidity

7

UV Index

10mi

Visibility

3%

Cloud Cover

4PM

1%

70°

Feels Like 70°

Sunny

W 16 mph

Wind

1014 mb

Pressure

57%

Humidity

4

UV Index

10mi

Visibility

3%

Cloud Cover

5PM

1%

68°

Feels Like 68°

Sunny

W 15 mph

Wind

1014 mb

Pressure

62%

Humidity

2

UV Index

10mi

Visibility

3%

Cloud Cover

6PM

2%

64°

Feels Like 63°

Sunny

W 13 mph

Wind

1014 mb

Pressure

70%

Humidity

1

UV Index

10mi

Visibility

2%

Cloud Cover

7PM

4%

60°

Feels Like 59°

Partly Cloudy

WSW 11 mph

Wind

1014 mb

Pressure

77%

Humidity

0

UV Index

10mi

Visibility

30%

Cloud Cover

8PM

15%

58°

Feels Like 56°

Partly Cloudy

WSW 10 mph

Wind

1014 mb

Pressure

81%

Humidity

0

UV Index

10mi

Visibility

44%

Cloud Cover

9PM

19%

57°

Feels Like 55°

Mostly Cloudy

WSW 9 mph

Wind

1015 mb

Pressure

84%

Humidity

0

UV Index

10mi

Visibility

69%

Cloud Cover

10PM

17%

56°

Feels Like 54°

Mostly Cloudy

WSW 9 mph

Wind

1015 mb

Pressure

85%

Humidity

0

UV Index

10mi

Visibility

73%

Cloud Cover

11PM

15%

56°

Feels Like 54°

Mostly Cloudy

SW 9 mph

Wind

1015 mb

Pressure

85%

Humidity

0

UV Index

1.3mi

Visibility

76%

Cloud Cover

12AM

15%

56°

Feels Like 53°

Cloudy

WSW 9 mph

Wind

1015 mb

Pressure

85%

Humidity

0

UV Index

5mi

Visibility

83%

Cloud Cover

1AM

17%

55°

Feels Like 53°

Cloudy

SW 9 mph

Wind

1015 mb

Pressure

87%

Humidity

0

UV Index

5mi

Visibility

84%

Cloud Cover

2AM

23%

55°

Feels Like 52°

Cloudy

SW 9 mph

Wind

1015 mb

Pressure

87%

Humidity

0

UV Index

2.2mi

Visibility

85%

Cloud Cover

Sat 5/9

Sat

2%

53°

72°

Mainly sunny. Highs in the low 70s and lows in the low 50s.

72°

Feels Like

W 16 mph

Wind

59%

Humidity

8

UV Index

6:04 AM

Sunrise

8:06 PM

Sunset

Sun 5/10

Sun

21%

53°

69°

Morning clouds followed by afternoon sun. Highs in the upper 60s and lows in the low 50s.

69°

Feels Like

WSW 12 mph

Wind

71%

Humidity

9

UV Index

6:03 AM

Sunrise

8:07 PM

Sunset

Mon 5/11

Mon

8%

51°

78°

Partly cloudy. Highs in the upper 70s and lows in the mid 50s.

78°

Feels Like

W 12 mph

Wind

60%

Humidity

9

UV Index

6:02 AM

Sunrise

8:08 PM

Sunset

Tue 5/12

Tue

7%

54°

70°

Partly cloudy. Highs in the low 70s and lows in the mid 50s.

70°

Feels Like

W 14 mph

Wind

66%

Humidity

9

UV Index

6:01 AM

Sunrise

8:08 PM

Sunset

Wed 5/13

Wed

18%

54°

68°

Times of sun and clouds. Highs in the upper 60s and lows in the low 50s.

68°

Feels Like

W 15 mph

Wind

61%

Humidity

9

UV Index

6:00 AM

Sunrise

8:09 PM

Sunset

Thu 5/14

Thu

6%

53°

73°

Times of sun and clouds. Highs in the low 70s and lows in the low 50s.

73°

Feels Like

WSW 13 mph

Wind

58%

Humidity

9

UV Index

5:59 AM

Sunrise

8:10 PM

Sunset

Fri 5/15

Fri

5%

53°

76°

Sunshine. Highs in the mid 70s and lows in the low 50s.

76°

Feels Like

W 13 mph

Wind

54%

Humidity

9

UV Index

5:58 AM

Sunrise

8:11 PM

Sunset

Sat 5/16

Sat

4%

53°

77°

Sunny. Highs in the upper 70s and lows in the low 50s.

77°

Feels Like

W 13 mph

Wind

52%

Humidity

9

UV Index

5:57 AM

Sunrise

8:12 PM

Sunset

Need to see beyond 12 Hours?

Find more forecast on the FREE FOX WEATHER App

GO TO APP STORE

Looking for homes in this area?

• 20917 Locust St Unit D, Cherryland, CA 94541
• 4596 James Ave, Castro Valley, CA 94546
• 5239 Katrina Ct, Castro Valley, CA 94546

Sponsored by Redfin. Housing data supplied by Redfin independent of FOX Weather.

Latest Stories from California

Brewing Super El Niño could turn the California coast into a summer hotspot for great white sharks

As a super El Niño develops, rising ocean surface temperatures could make great white sharks and other species more prevalent along the California coast this summer.

Watch: Strong winds send hot air balloon into California casino, power line before remarkable safe landing

A frightening hot air balloon accident ended remarkably well April 27, after strong winds triggered an unplanned launch at Sky River Casino, sending the aircraft into the side of the building before a safe landing.

What is an ash devil? Rare phenomenon forms during wildfire in California

A rare phenomenon was captured on camera as a wildfire scorched several acres in San Bernardino County in California. It occurs when intense heat from a wildfire causes air to rise and spin, pulling ash, embers and debris into a rotating column – almost mimicking a small tornado.

Names announced for 2026 Friends of Big Bear Valley bald eagle babies out of 63,000 entries

The two eaglets born from viral bald eagle couple Jackie and Shadow in Big Bear Valley, officially have names.

Load More Stories