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Bay Area Forecast

Today's Highs/Lows
Concord 70° / 45°
Fairfield 73° / 45°
Fremont 67° / 46°
Hayward 68° / 48°
Livermore 70° / 43°
Moffett Field 68° / 46°
Napa 69° / 42°
Oakland 68° / 47°
Redwood City 64° / 48°
San Francisco 64° / 49°
San Jose 69° / 44°
San Rafael 68° / 41°
Santa Cruz 72° / 46°

Going Somewhere?

Selected Highs/Lows
Arcata 56° / 40°
Bakersfield 77° / 51°
Fresno 76° / 48°
Henderson 87° / 58°
Los Angeles 70° / 57°
Monterey 64° / 46°
Mount Shasta 56° / 29°
Palm Springs 93° / 64°
Redding 70° / 44°
Reno 66° / 34°
Sacramento 75° / 48°
San Diego 67° / 60°
S. Lake Tahoe 56° / 25°
Ukiah 66° / 38°
Yosemite 59° / 27°
Weather

Current Conditions
Update: 3:54 PM

Castro Valley, CA
Clear

Clear Temperature: 68°
Wind: WNW 22 mph
Dew point:47°
Pressure:30.16 in.
Humidity: 47%
Visibility: 10.0 miles
Observed at: Hayward, CA

Forecast for Castro Valley

clear

Tuesday

Plentiful sunshine. High 68F. Winds WNW at 15 to 25 mph.

nt_clear

Tuesday Night

Clear skies. Low 48F. Winds NW at 10 to 20 mph.

clear

Wednesday

Sunny. High 67F. Winds WNW at 10 to 20 mph.

Bay Area Temps

Updated: 7:50 PM EDT on March 31, 2015
Fairfield
73°
Half Moon Bay
57°
Hayward
68°
Livermore
70°
Moffett Field
67°
Napa
69°
Novato
68°
Oakland
66°
Richmond
66°
San Francisco
63°
San Jose
67°
Santa Rosa
70°
Walnut Creek
70°
Map


World Weather Search

Enter any City, State or ZIP Code, or Airport Code or Country

5 Day Forecast for ZIP Code 94546

Tuesday Wednesday Thursday Friday Saturday
Clear
Clear
Clear
Clear
Clear
Clear
High: 68°
Low: 48°
Detail | Almanac
Clear
High: 67°
Low: 49°
Detail | Almanac
Clear
High: 73°
Low: 49°
Detail | Almanac
Clear
High: 72°
Low: 47°
Detail | Almanac
Clear
High: 66°
Low: 49°
Detail | Almanac

Extended forecast for Castro Valley

nt_clear Wednesday Night

A mostly clear sky. Low 49F. Winds NW at 10 to 15 mph.

clear Thursday

A mainly sunny sky. High 73F. Winds NNW at 10 to 20 mph.

nt_clear Thursday Night

Clear skies. Low 49F. Winds WNW at 10 to 15 mph.

clear Friday

Sunny skies. High 72F. Winds NW at 10 to 20 mph.

nt_clear Friday Night

Mainly clear early, then a few clouds later on. Low 47F. Winds WSW at 10 to 15 mph.

clear Saturday

A few passing clouds, otherwise generally sunny. High 66F. Winds W at 15 to 25 mph.

nt_partlycloudy Saturday Night

A few clouds. Low 49F. Winds WNW at 10 to 20 mph.

chancerain Sunday

Partly cloudy early followed by increasing clouds with showers developing later in the day. High 63F. Winds W at 15 to 25 mph. Chance of rain 40%.

nt_chancerain Sunday Night

Mostly clear skies early will give way to occasional showers later during the night. Low 47F. Winds W at 10 to 20 mph. Chance of rain 40%.

chancerain Monday

Showers in the morning, then partly cloudy in the afternoon. High 64F. Winds W at 10 to 20 mph. Chance of rain 40%.

nt_chancerain Monday Night

Partly cloudy skies early followed by increasing clouds with showers developing later at night. Low 49F. W winds shifting to SSE at 10 to 15 mph. Chance of rain 40%.

partlycloudy Tuesday

Intervals of clouds and sunshine. High 67F. Winds W at 10 to 20 mph.

nt_clear Tuesday Night

A mostly clear sky. Low 49F. Winds WNW at 10 to 15 mph.

clear Wednesday

Sunny skies. High 69F. Winds WNW at 10 to 20 mph.

nt_clear Wednesday Night

Partly cloudy. Low around 50F. Winds WNW at 10 to 20 mph.

clear Thursday

A few clouds early, otherwise mostly sunny. High 68F. Winds W at 10 to 20 mph.

nt_chancerain Thursday Night

Partly cloudy skies early will give way to occasional showers later during the night. Low 51F. Winds W at 10 to 15 mph. Chance of rain 60%.

chancerain Friday

Light rain early...then remaining cloudy with showers in the afternoon. High 68F. Winds WNW at 10 to 20 mph. Chance of rain 60%.

nt_partlycloudy Friday Night

Partly cloudy. Low around 50F. Winds NW at 10 to 15 mph.

Almanac

Key: T = Trace of precipitation
MM = data not available

March 31, 2015
Normal high: 65°
Record high: 87° (2011)
 
Normal low: 48°
Record low: 39° (2008)
 

Complete weather almanac

Astronomy

Sunrise: 06:55 AM (PDT)
Moon Rise: 04:22 PM (PDT)
 
Sunset: 07:30 PM (PDT)
Moon Set: 04:53 AM (PDT)
Moon Phase
 
Mar. 31 Apr. 04 Apr. 11 Apr. 18 Apr. 25

Air Pollution Forecast for Oakland

  Air Quality AQ Index Pollutant
YesterdayModeratePM2.5
YesterdayGoodOZONE
CurrentGoodPM2.5
CurrentGoodOZONE
TueGood PM2.5
WedGood PM2.5
ThuGood PM2.5
FriGood PM2.5
SatGood PM2.5

Bay Area Conditions

  Yesterday Today Conditions
  High Low High Low  
Antioch 81° 50° 70° 45° Clear
Benicia 81° 50° 70° 45° Clear
Berkeley 64° 46° 68° 47° Partly Cloudy
Brentwood 81° 45° 70° 43° Clear
Concord 81° 50° 70° 45° Clear
Fairfield 79° 46° 73° 45° Clear
Fremont 70° 55° 67° 46° Clear
Half Moon Bay 57° 41° 59° 48° Haze
Hayward 70° 52° 68° 48° Clear
Livermore 81° 45° 70° 43° Clear
Moffett Field 66° 52° 68° 46° Clear
Napa 70° 43° 69° 42° Clear
Novato 70° 43° 68° 41° Clear
Oakland 64° 46° 68° 47° Partly Cloudy
Richmond 64° 46° 68° 47° Partly Cloudy
Redwood City 68° 52° 64° 48° Clear
San Francisco 64° 52° 64° 49° Partly Cloudy
San Jose 72° 50° 69° 44° Partly Cloudy
San Mateo 64° 52° 64° 49° Partly Cloudy
San Rafael 70° 43° 68° 41° Clear
San Ramon 81° 45° 70° 43° Clear
Santa Rosa 75° 43° 69° 40° Partly Cloudy
Santa Cruz 72° 46° 72° 46° Clear
Tracy 86° 46° 76° 47° Clear
Vacaville 84° 48° 75° 47° Clear
Walnut Creek 81° 50° 70° 45° Clear
Arcata 55° 46° 56° 40° Clear
Bakersfield 90° 54° 77° 51° Clear
Fresno 90° 55° 76° 48° Partly Cloudy
Henderson 88° 59° 87° 58° Clear
Los Angeles 79° 57° 70° 57° Clear
Monterey 63° 43° 64° 46° Clear
Mount Shasta 73° 37° 56° 29° Partly Cloudy
Palm Springs 97° 64° 93° 64° Clear
Redding 82° 48° 70° 44° Clear
Reno 81° 39° 66° 34° Partly Cloudy
Sacramento 82° 46° 75° 48° Clear
San Diego 72° 61° 67° 60° Mostly Cloudy
South Lake Tahoe 72° 30° 56° 25° Clear
Ukiah 81° 46° 66° 38° Clear
Yosemite National Park 82° 48° 59° 27° Clear
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