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    • Wind Animation
    ECMWF, GFS, ICON, GEM
    New: Official Warnings from National Meteorological Institutes Warning

    Castro Valley

    World / United States / California

    37°41'N / 122°5'W / Altitude 49 m / 18:25 2026/04/21, America/Los_Angeles (UTC-7)

    overcast 15.6 °C
    Wind speed 22 km/h
     
    Precipitation (1 hr.) 0 mm
    Humidity 64 %
    Visibility 16 km
    Clouds 80 %
    Cloud base 853 m

    Weather report from station Hayward, Distance: 4 km (18:03 2026/04/21)

    Open Radar Map

    Weather for the next 24 hours

    19:0020:0021:0022:0023:0000:00 tomorrow01:00 tomorrow02:00 tomorrow03:00 tomorrow04:00 tomorrow05:00 tomorrow06:00 tomorrow07:00 tomorrow08:00 tomorrow09:00 tomorrow10:00 tomorrow11:00 tomorrow12:00 tomorrow13:00 tomorrow14:00 tomorrow15:00 tomorrow16:00 tomorrow17:00 tomorrow18:00 tomorrow19:00 tomorrow
    overcast
    13 °C
    0 mm
    30 %
    W
    13 km/h
    		 clear sky with few clouds
    12 °C
    0 mm
    20 %
    W
    9 km/h
    		 clear sky
    11 °C
    0 mm
    30 %
    W
    7 km/h
    		 clear sky
    11 °C
    0 mm
    20 %
    SW
    6 km/h
    		 clear sky
    10 °C
    0 mm
    20 %
    SW
    7 km/h
    		 clear sky
    10 °C
    0 mm
    10 %
    SW
    9 km/h
    		 clear sky with few clouds
    10 °C
    0 mm
    10 %
    SW
    8 km/h
    		 clear sky with few clouds
    9 °C
    0 mm
    10 %
    S
    7 km/h
    		 overcast
    9 °C
    0 mm
    10 %
    SE
    8 km/h
    		 overcast
    9 °C
    0 mm
    10 %
    SE
    8 km/h
    		 overcast
    9 °C
    0 mm
    20 %
    SE
    9 km/h
    		 overcast
    9 °C
    0 mm
    20 %
    SE
    8 km/h
    		 overcast with rain
    10 °C
    0.7 mm
    60 %
    E
    5 km/h
    		 overcast with rain
    10 °C
    1 mm
    60 %
    SE
    8 km/h
    		 overcast
    11 °C
    0 mm
    10 %
    N
    11 km/h
    		 overcast
    12 °C
    0 mm
    10 %
    SE
    10 km/h
    		 clear sky with few clouds
    14 °C
    0 mm
    10 %
    NW
    1 km/h
    		 partly cloudy
    15 °C
    0 mm
    20 %
    N
    3 km/h
    		 partly cloudy
    16 °C
    0 mm
    10 %
    NW
    6 km/h
    		 partly cloudy
    16 °C
    0 mm
    10 %
    NW
    10 km/h
    		 overcast
    16 °C
    0 mm
    10 %
    NW
    10 km/h
    		 overcast
    16 °C
    0 mm
    10 %
    NW
    10 km/h
    		 overcast
    16 °C
    0 mm
    20 %
    NW
    13 km/h
    		 clear sky with few clouds
    15 °C
    0 mm
    10 %
    NW
    13 km/h
    		 clear sky
    14 °C
    0 mm
    10 %
    NW
    7 km/h

    Forecast

    02:0005:0008:0011:0014:0017:0020:0023:00
    clear sky with few clouds
    9 °C
    0 mm
    10 %
    S
    7 km/h
    		 overcast
    9 °C
    0 mm
    20 %
    SE
    9 km/h
    		 overcast with rain
    10 °C
    1.7 mm
    60 %
    SE
    8 km/h
    		 clear sky with few clouds
    14 °C
    0 mm
    10 %
    NW
    1 km/h
    		 partly cloudy
    16 °C
    0 mm
    20 %
    NW
    10 km/h
    		 overcast
    16 °C
    0 mm
    20 %
    NW
    13 km/h
    		 clear sky
    13 °C
    0 mm
    10 %
    NW
    6 km/h
    		 clear sky
    10 °C
    0 mm
    0 %
    W
    3 km/h

    Meteogram

    109811111110108898771416201516161717171818171916
    22
    20
    18
    16
    14
    12
    10
    8
    6
    Tue
    21
    overcast with rain    		Wed
    22
    overcast with rain    		Thu
    23
    clear sky    		Fri
    24
    overcast    		Sat
    25
    mostly cloudy    		Sun
    26
    mostly cloudy    		Mon
    27
    partly cloudy    		Tue
    28
    mixed with rain showers    		Wed
    29
    mixed with rain showers    		Thu
    30
    clear sky    		Fri
    01
    mostly cloudy    		Sat
    02
    clear sky    		Sun
    03
    clear sky    		Mon
    04
    clear sky

    Air quality (AQI)


    Air quality index (marked as AQI) is developed by Environmental Protection Agency. Values over 300 represents hazardous air quality, between 200-300 very unhealthy, 150-200 unhealthy, 100-150 unhealthy for sensitive groups and below 100 or rather below 50 the air quality is good.

    Sun and Moon

    Heading: Time:
    Phase: Altitude:


    Heading: Time:
    Illumination: Altitude:


    Date rise set rise Illumination


    Phase Time Length