Castro Valley, CA Weather

    06:00 Wednesday
    Overcast
    Overcast
    7° Feels like 6°
    First Quarter First Quarter Illuminated: 90%
    • Today 31 Dec. Light rain with cloudy skies 90% 12 mm 10° / 4° Moderate northeast wind 11 - 22 km/h
    • Tomorrow 1 Jan. Light rain with cloudy skies 90% 4.8 mm 16° / 8° Moderate south wind 17 - 42 km/h
    • Friday 2 Jan. Light rain with partly cloudy skies 90% 3.3 mm 17° / 11° Moderate southeast wind 19 - 46 km/h
    • Saturday 3 Jan. Light rain with partly cloudy skies 90% 10 mm 16° / 12° Strong south wind 19 - 50 km/h
    • Sunday 4 Jan. Moderate rain with cloudy skies 90% 20 mm 14° / 11° Moderate south wind 17 - 38 km/h
    • Monday 5 Jan. Light rain with partly cloudy skies 90% 7.6 mm 13° / 9° Moderate south wind 11 - 29 km/h
    • Tuesday 6 Jan. Partly cloudy 14° / 6° Moderate northeast wind 11 - 30 km/h

    Weather Forecast for Castro Valley, CA Today

    , 31 December

    Tomorrow

    , 1 January
    07:00 Overcast 7° Overcast
    Feels Like 6°
    Gentle northeast wind Northeast 6 - 15 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 83%
    • Dew Point Dew Point 4 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 6 °C
    • Visibility Visibility 35 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 11483 ft
    08:00 Overcast 8° Overcast
    Feels Like 7°
    Gentle east wind East 5 - 14 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 5 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 7 °C
    • Visibility Visibility 30 km
    • Wind Wind - Average 5 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 14 km/h
    • Snowline Snowline 11483 ft
    09:00 Overcast 8° Overcast
    Feels Like 8°
    Gentle northeast wind Northeast 6 - 14 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 80%
    • Dew Point Dew Point 5 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 35 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 14 km/h
    • Snowline Snowline 11483 ft
    10:00 Overcast 9° Overcast
    Feels Like 8°
    Gentle east wind East 7 - 17 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 78%
    • Dew Point Dew Point 5 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 16 km
    • Wind Wind - Average 7 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 17 km/h
    • Snowline Snowline 11483 ft
    Light rain 11:00 Light rain with cloudy skies 40% 0.024 mm 10° Light rain
    Feels Like 9°
    Gentle east wind East 8 - 18 km/h
    		UV Index 1 Low SPF: no
    11:00 Light rain with cloudy skies 50% 1.3 mm 10° Light rain
    Feels Like 9°
    Gentle east wind East 8 - 18 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 40% 0.024 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 7 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 9 °C
    • Visibility Visibility 4 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 18 km/h
    • Snowline Snowline 11155 ft
    12:00 Light rain with cloudy skies 50% 0.028 mm 9° Light rain
    Feels Like 8°
    Gentle east wind East 6 - 16 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 50% 0.028 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1016 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 16 km/h
    • Snowline Snowline 10827 ft
    13:00 Light rain with cloudy skies 80% 0.024 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 9 - 18 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 80% 0.024 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1015 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 18 km/h
    • Snowline Snowline 10827 ft
    Light rain 14:00 Light rain with cloudy skies 90% 0.024 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 9 - 18 km/h
    		UV Index 1 Low SPF: no
    14:00 Light rain with cloudy skies 90% 1.8 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 9 - 18 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 90% 0.024 mm
    • Humidity Humidity 94%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 4 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1014 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 18 km/h
    • Snowline Snowline 10827 ft
    15:00 Light rain with cloudy skies 90% 0.024 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 9 - 18 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.024 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 10 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 18 km/h
    • Snowline Snowline 10499 ft
    16:00 Light rain with cloudy skies 90% 0.008 mm 9° Light rain
    Feels Like 8°
    Moderate northeast wind Northeast 11 - 22 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.008 mm
    • Humidity Humidity 92%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 8 km
    • Wind Wind - Average 11 km/h
    • Pressure Pressure 1013 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 22 km/h
    • Snowline Snowline 10499 ft
    Light rain 17:00 Light rain with cloudy skies 90% 0.012 mm 9° Light rain
    Feels Like 8°
    Moderate east wind East 9 - 22 km/h
    		UV Index 0 Low SPF: no
    17:00 Light rain with cloudy skies 90% 1.4 mm 9° Light rain
    Feels Like 8°
    Moderate east wind East 9 - 22 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.012 mm
    • Humidity Humidity 92%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 22 km/h
    • Snowline Snowline 10499 ft
    18:00 Light rain with cloudy skies 90% 0.035 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 7 - 18 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.035 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 4 km
    • Wind Wind - Average 7 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 18 km/h
    • Snowline Snowline 10499 ft
    19:00 Light rain with cloudy skies 90% 0.031 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 8 - 15 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.031 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 10171 ft
    Light rain 20:00 Light rain with cloudy skies 90% 0.02 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 7 - 15 km/h
    		UV Index 0 Low SPF: no
    20:00 Light rain with cloudy skies 90% 2 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 7 - 15 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.02 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 7 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 10171 ft
    21:00 Light rain with cloudy skies 90% 0.028 mm 9° Light rain
    Feels Like 8°
    Gentle northeast wind Northeast 8 - 15 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.028 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 8 °C
    • Visibility Visibility 3 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 10171 ft
    22:00 Light rain with cloudy skies 90% 0.063 mm 9° Light rain
    Feels Like 7°
    Gentle northeast wind Northeast 8 - 16 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.063 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 7 °C
    • Visibility Visibility 2 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 16 km/h
    • Snowline Snowline 10171 ft
    Light rain 23:00 Light rain with cloudy skies 90% 0.075 mm 8° Light rain
    Feels Like 7°
    Gentle northeast wind Northeast 9 - 17 km/h
    		UV Index 0 Low SPF: no
    23:00 Light rain with cloudy skies 90% 5.4 mm 8° Light rain
    Feels Like 7°
    Gentle northeast wind Northeast 9 - 17 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.075 mm
    • Humidity Humidity 97%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 7 °C
    • Visibility Visibility 3 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1012 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 17 km/h
    • Snowline Snowline 10171 ft
    24:00 Light rain with cloudy skies 70% 0.075 mm 8° Light rain
    Feels Like 7°
    Gentle northeast wind Northeast 9 - 19 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.075 mm
    • Humidity Humidity 98%
    • Dew Point Dew Point 8 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 7 °C
    • Visibility Visibility 2 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1011 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 19 km/h
    • Snowline Snowline 10499 ft

    Sunrise and Sunset

    Sunrise 07:23 Sunset 16:59
    First light 06:54 Midday 12:11 Last light 17:29
    Day length 9h 36m

    Time remaining until sunrise 46m

    Lunar calendar

    Mon Tue Wed Thu Fri Sat Sun
    31 First Quarter
    1 First Quarter
    2 Full Moon
    3 Full Moon
    4 Last Quarter
    5 Last Quarter
    6 Last Quarter
    7 Last Quarter
    8 Last Quarter
    9 Last Quarter
    10 Last Quarter
    11 Last Quarter
    12 Last Quarter
    13 Last Quarter

    Air quality in Castro Valley today

    Detail
    36
    Fair PM₂₅ (21 µg/m³)
    • Little health risk.
    • Sensitive people should consider reducing prolonged or intense outdoor activities if they experience symptoms.

    Weather graphs
    Maximum Minimum Rainfall

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