Current Weather Forecast for Castro Valley

CA 94546  |   4:34pm

Weather Conditions

83°

Feels Like 83°

Sunny

58° 83°

4

UV Index

Good

Air Quality

W 12 mph

Wind

0 in

rain

Tonight

Sat 8/1

57°

Lowest Temperature

20%

Clear to partly cloudy. Low 57F. Winds WSW at 10 to 15 mph.

Tomorrow

Sun 8/2

84°

Highest Temperature

8%

Partly cloudy skies. High 84F. Winds W at 10 to 15 mph.

Tomorrow night

Sun 8/2

57°

Lowest Temperature

19%

Clear to partly cloudy. Low 57F. Winds WNW at 5 to 10 mph.

Next 12 Hours Next 7 Days

Next 12 Hours Forecast in Castro Valley

Hourly Weather Forecast & Temperature

5PM

82°

Feels Like 82°

Sunny

W 11 mph

Wind

1013 mb

Pressure

40%

Humidity

3

UV Index

10mi

Visibility

3%

Cloud Cover

6PM

79°

Feels Like 80°

Sunny

W 10 mph

Wind

1013 mb

Pressure

43%

Humidity

1

UV Index

10mi

Visibility

4%

Cloud Cover

7PM

1%

76°

Feels Like 76°

Sunny

W 9 mph

Wind

1013 mb

Pressure

49%

Humidity

0

UV Index

10mi

Visibility

2%

Cloud Cover

8PM

2%

69°

Feels Like 69°

Sunny

WSW 7 mph

Wind

1013 mb

Pressure

62%

Humidity

0

UV Index

10mi

Visibility

0%

Cloud Cover

9PM

2%

66°

Feels Like 66°

Clear

WSW 6 mph

Wind

1013 mb

Pressure

70%

Humidity

0

UV Index

10mi

Visibility

2%

Cloud Cover

10PM

2%

64°

Feels Like 64°

Clear

WSW 6 mph

Wind

1013 mb

Pressure

75%

Humidity

0

UV Index

10mi

Visibility

10%

Cloud Cover

11PM

3%

63°

Feels Like 63°

Mostly Clear

WSW 6 mph

Wind

1013 mb

Pressure

79%

Humidity

0

UV Index

10mi

Visibility

20%

Cloud Cover

12AM

7%

62°

Feels Like 62°

Mostly Clear

SW 5 mph

Wind

1013 mb

Pressure

80%

Humidity

0

UV Index

9mi

Visibility

23%

Cloud Cover

1AM

7%

61°

Feels Like 61°

Mostly Clear

SW 5 mph

Wind

1013 mb

Pressure

82%

Humidity

0

UV Index

9mi

Visibility

23%

Cloud Cover

2AM

8%

61°

Feels Like 60°

Mostly Clear

SW 5 mph

Wind

1013 mb

Pressure

84%

Humidity

0

UV Index

10mi

Visibility

29%

Cloud Cover

3AM

8%

60°

Feels Like 60°

Partly Cloudy

SW 5 mph

Wind

1012 mb

Pressure

85%

Humidity

0

UV Index

10mi

Visibility

32%

Cloud Cover

4AM

8%

59°

Feels Like 59°

Partly Cloudy

SW 5 mph

Wind

1012 mb

Pressure

87%

Humidity

0

UV Index

10mi

Visibility

44%

Cloud Cover

Sat 8/1

Sat

20%

58°

83°

A few clouds. Lows overnight in the upper 50s.

57°

Feels Like

WSW 12 mph

Wind

71%

Humidity

0

UV Index

6:12 AM

Sunrise

8:16 PM

Sunset

Sun 8/2

Sun

8%

57°

84°

Mix of sun and clouds. Highs in the mid 80s and lows in the upper 50s.

84°

Feels Like

W 12 mph

Wind

55%

Humidity

10

UV Index

6:13 AM

Sunrise

8:15 PM

Sunset

Mon 8/3

Mon

7%

57°

85°

Mainly sunny. Highs in the mid 80s and lows in the upper 50s.

85°

Feels Like

WNW 12 mph

Wind

51%

Humidity

10

UV Index

6:14 AM

Sunrise

8:14 PM

Sunset

Tue 8/4

Tue

7%

59°

79°

Mix of sun and clouds. Highs in the upper 70s and lows in the upper 50s.

79°

Feels Like

WNW 12 mph

Wind

59%

Humidity

10

UV Index

6:15 AM

Sunrise

8:13 PM

Sunset

Wed 8/5

Wed

6%

58°

78°

Mix of sun and clouds. Highs in the upper 70s and lows in the upper 50s.

78°

Feels Like

WNW 12 mph

Wind

62%

Humidity

10

UV Index

6:15 AM

Sunrise

8:12 PM

Sunset

Thu 8/6

Thu

18%

58°

77°

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

77°

Feels Like

WNW 12 mph

Wind

62%

Humidity

10

UV Index

6:16 AM

Sunrise

8:11 PM

Sunset

Fri 8/7

Fri

18%

58°

78°

Mix of sun and clouds. Highs in the upper 70s and lows in the upper 50s.

78°

Feels Like

WNW 12 mph

Wind

62%

Humidity

10

UV Index

6:17 AM

Sunrise

8:10 PM

Sunset

Sat 8/8

Sat

5%

59°

79°

Mainly sunny. Highs in the upper 70s and lows in the low 60s.

79°

Feels Like

W 12 mph

Wind

60%

Humidity

10

UV Index

6:18 AM

Sunrise

8:09 PM

Sunset

Plans up in the air? We'll help you weather-proof them. Get the FREE FOX Weather app.

Download the App

Looking for homes in this area?

• 21062 Gary Dr #107, Hayward, CA 94546
• 20115 Redwood Rd #7, Castro Valley, CA 94546
• 25489 Palomares Rd, Castro Valley, CA 94552

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

Latest Stories from California

Watch: Two rattlesnakes ‘dance’ on busy street as Southern California sees spike in bite cases

Video captured in Southern California shows two large rattlesnakes fighting near a storm drain in Thousand Oaks on Tuesday, highlighting a broader, unsettling surge in snake encounters across the region.

Genevieve weakens after becoming first Category 5 in Eastern Pacific since 2024

Genevieve weakened to a Category 1 hurricane Thursday morning after becoming the Eastern Pacific's first Category 5 storm since 2024.

Millions under heat alerts as life-threatening heat dome bakes the West with triple-digit temperatures

The heat dome that has plagued the Central and Southern Plains for the last several days is retreating back to the West, bringing extreme triple-digit temperatures to the Four Corners and Desert Southwest.

Northern California rattled by magnitude 4.3 earthquake along Pacific Ring of Fire

A magnitude 4.3 earthquake rattled Northern California on Tuesday night, marking the latest quake to happen along the Pacific Ring of Fire.

Load More Stories