Castro Valley, CA Weather

    01:00 Monday
    Moderate rain
    Moderate rain with cloudy skies
    14° Feels like 14°
    Rainfall 90% 2.9 mm
    • Today 22 Dec. Moderate rain with cloudy skies 90% 9.7 mm 16° / 12° Moderate south wind 15 - 32 km/h
    • Tomorrow 23 Dec. Light rain with partly cloudy skies 90% 1.1 mm 17° / 13° Strong southeast wind 28 - 61 km/h
    • Wednesday 24 Dec. Moderate rain with partly cloudy skies 90% 15 mm 17° / 11° Very strong south wind 35 - 76 km/h
    • Thursday 25 Dec. Moderate rain with partly cloudy skies 90% 24 mm 13° / 9° Strong southwest wind 26 - 70 km/h
    • Friday 26 Dec. Moderate rain with partly cloudy skies 90% 12 mm 13° / 6° Moderate south wind 11 - 32 km/h
    • Saturday 27 Dec. Fog More information 12° / 4° Moderate northwest wind 6 - 20 km/h
    • Sunday 28 Dec. Clear 13° / 1° Moderate northeast wind 7 - 22 km/h

    Weather Forecast for Castro Valley, CA Today

    , 22 December

    Tomorrow

    , 23 December
    02:00 Moderate rain with cloudy skies 90% 0.114 mm 14° Moderate rain
    Feels Like 14°
    Moderate south wind South 14 - 30 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.114 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 2 km
    • Wind Wind - Average 14 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 30 km/h
    • Snowline Snowline 9843 ft
    03:00 Light rain with cloudy skies 70% 0.079 mm 14° Light rain
    Feels Like 14°
    Moderate south wind South 15 - 31 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.079 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 4 km
    • Wind Wind - Average 15 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 31 km/h
    • Snowline Snowline 10499 ft
    04:00 Light rain with cloudy skies 70% 0.02 mm 14° Light rain
    Feels Like 14°
    Moderate south wind South 15 - 32 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.02 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 15 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 32 km/h
    • Snowline Snowline 10171 ft
    Light rain 05:00 Light rain with cloudy skies 70% 0.016 mm 14° Light rain
    Feels Like 14°
    Moderate southeast wind Southeast 13 - 32 km/h
    		UV Index 0 Low SPF: no
    05:00 Light rain with cloudy skies 70% 1.6 mm 14° Light rain
    Feels Like 14°
    Moderate southeast wind Southeast 13 - 32 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.016 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 13 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 32 km/h
    • Snowline Snowline 10171 ft
    06:00 Light rain with cloudy skies 70% 0.028 mm 13° Light rain
    Feels Like 13°
    Moderate southeast wind Southeast 13 - 27 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.028 mm
    • Humidity Humidity 94%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 13 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 27 km/h
    • Snowline Snowline 10171 ft
    07:00 Light rain with cloudy skies 60% 0.016 mm 13° Light rain
    Feels Like 13°
    Moderate south wind South 14 - 28 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.016 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 6 km
    • Wind Wind - Average 14 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 28 km/h
    • Snowline Snowline 10499 ft
    Light rain 08:00 Light rain with cloudy skies 60% 0.012 mm 13° Light rain
    Feels Like 13°
    Moderate south wind South 13 - 28 km/h
    		UV Index 0 Low SPF: no
    08:00 Light rain with cloudy skies 60% 1 mm 13° Light rain
    Feels Like 13°
    Moderate south wind South 13 - 28 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.012 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 6 km
    • Wind Wind - Average 13 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 28 km/h
    • Snowline Snowline 10171 ft
    09:00 Light rain with cloudy skies 60% 0.012 mm 14° Light rain
    Feels Like 14°
    Moderate south wind South 13 - 27 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.012 mm
    • Humidity Humidity 91%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 6 km
    • Wind Wind - Average 13 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 27 km/h
    • Snowline Snowline 10171 ft
    10:00 Light rain with cloudy skies 60% 0.012 mm 14° Light rain
    Feels Like 14°
    Moderate south wind South 12 - 26 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.012 mm
    • Humidity Humidity 89%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 8 km
    • Wind Wind - Average 12 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 26 km/h
    • Snowline Snowline 10171 ft
    Light rain 11:00 Light rain with cloudy skies 50% 0.004 mm 15° Light rain
    Feels Like 15°
    Moderate south wind South 10 - 24 km/h
    		UV Index 1 Low SPF: no
    11:00 Light rain with cloudy skies 60% 0.4 mm 15° Light rain
    Feels Like 15°
    Moderate south wind South 10 - 24 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 50% 0.004 mm
    • Humidity Humidity 87%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 15 °C
    • Visibility Visibility 12 km
    • Wind Wind - Average 10 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 24 km/h
    • Snowline Snowline 9843 ft
    12:00 Overcast 15° Overcast
    Feels Like 15°
    Moderate south wind South 8 - 24 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 83%
    • Dew Point Dew Point 12 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 15 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 24 km/h
    • Snowline Snowline 10171 ft
    13:00 Overcast 16° Overcast
    Feels Like 16°
    Gentle south wind South 6 - 19 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 99%
    • Feels Like Feels Like 16 °C
    • Visibility Visibility 35 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1015 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 19 km/h
    • Snowline Snowline 9843 ft
    Overcast 14:00 Overcast 16° Overcast
    Feels Like 16°
    Gentle south wind South 5 - 16 km/h
    		UV Index 1 Low SPF: no
    14:00 Overcast 16° Overcast
    Feels Like 16°
    Gentle south wind South 5 - 16 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 16 °C
    • Visibility Visibility 30 km
    • Wind Wind - Average 5 km/h
    • Pressure Pressure 1014 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 16 km/h
    • Snowline Snowline 9843 ft
    15:00 Overcast 16° Overcast
    Feels Like 16°
    Gentle south wind South 3 - 13 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 83%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 16 °C
    • Visibility Visibility 30 km
    • Wind Wind - Average 3 km/h
    • Pressure Pressure 1014 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 13 km/h
    • Snowline Snowline 9843 ft
    16:00 Overcast 16° Overcast
    Feels Like 16°
    Gentle east wind East 2 - 9 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 85%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 16 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 2 km/h
    • Pressure Pressure 1014 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 9 km/h
    • Snowline Snowline 9843 ft
    Overcast 17:00 Overcast 15° Overcast
    Feels Like 15°
    Gentle north wind North 2 - 7 km/h
    		UV Index 0 Low SPF: no
    17:00 Overcast 15° Overcast
    Feels Like 15°
    Gentle north wind North 2 - 7 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 91%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 15 °C
    • Visibility Visibility 20 km
    • Wind Wind - Average 2 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 7 km/h
    • Snowline Snowline 9843 ft
    18:00 Overcast 15° Overcast
    Feels Like 15°
    Gentle north wind North 3 - 8 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 15 °C
    • Visibility Visibility 20 km
    • Wind Wind - Average 3 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 8 km/h
    • Snowline Snowline 10171 ft
    19:00 Overcast 14° Overcast
    Feels Like 14°
    Gentle northwest wind Northwest 4 - 10 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 12 km
    • Wind Wind - Average 4 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 10 km/h
    • Snowline Snowline 10171 ft
    Light rain 20:00 Light rain with cloudy skies 30% 0.004 mm 14° Light rain
    Feels Like 14°
    Gentle northwest wind Northwest 3 - 9 km/h
    		UV Index 0 Low SPF: no
    20:00 Light rain with cloudy skies 30% 0.1 mm 14° Light rain
    Feels Like 14°
    Gentle northwest wind Northwest 3 - 9 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 30% 0.004 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 10 km
    • Wind Wind - Average 3 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 9 km/h
    • Snowline Snowline 10171 ft
    21:00 Overcast 14° Overcast
    Feels Like 14°
    Gentle west wind West 1 - 8 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 99%
    • Feels Like Feels Like 14 °C
    • Visibility Visibility 14 km
    • Wind Wind - Average 1 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 8 km/h
    • Snowline Snowline 10499 ft
    22:00 Partly cloudy 13° Partly cloudy
    Feels Like 13°
    Gentle southwest wind Southwest 1 - 5 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 99%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 95%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 14 km
    • Wind Wind - Average 1 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 5 km/h
    • Snowline Snowline 10499 ft
    Overcast 23:00 Overcast 13° Overcast
    Feels Like 13°
    Gentle southeast wind Southeast 1 - 4 km/h
    		UV Index 0 Low SPF: no
    23:00 Overcast 13° Overcast
    Feels Like 13°
    Gentle southeast wind Southeast 1 - 4 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 99%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 12 km
    • Wind Wind - Average 1 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 4 km/h
    • Snowline Snowline 10499 ft
    24:00 Overcast 13° Overcast
    Feels Like 13°
    Gentle southeast wind Southeast 6 - 12 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 98%
    • Dew Point Dew Point 13 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 13 °C
    • Visibility Visibility 9 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 12 km/h
    • Snowline Snowline 10499 ft

    Sunrise and Sunset

    Sunrise 07:20 Sunset 16:53
    First light 06:51 Midday 12:07 Last light 17:23
    Day length 9h 33m

    Time remaining until sunrise 5h 37m

    Lunar calendar

    Mon Tue Wed Thu Fri Sat Sun
    22 First Quarter
    23 First Quarter
    24 First Quarter
    25 First Quarter
    26 First Quarter
    27 First Quarter
    28 First Quarter
    29 First Quarter
    30 First Quarter
    31 First Quarter
    1 First Quarter
    2 Full Moon
    3 Full Moon
    4 Last Quarter

    Air quality in Castro Valley today

    Detail
    31
    Fair PM₂₅ (18 µg/m³)
    • Little health risk.
    • Sensitive people should consider reducing prolonged or intense outdoor activities if they experience symptoms.

    Weather graphs
    Maximum Minimum Rainfall

    Videos

    More Videos
    A large lenticular cloud covers one of the volcanoes in Kamchatka, Russia
    A large lenticular cloud covers one of the volcanoes in Kamchatka, Russia