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    Portola Valley

    World / United States / California

    37°22'N / 122°13'W / Altitude 162 m / 13:53 2026/08/25, America/Los_Angeles (UTC-7)

    partly cloudy 18 °C
    Wind speed 15 km/h
     
    Humidity 78 %
    Visibility 16 km
    Clouds 50 %
    Cloud base 6096 m

    Calculated from nearby stations (11:47 2026/08/25)

    Open Radar Map

    Weather for the next 24 hours

    14:0015:0016:0017:0018:0019:0020:0021:0022:0023:0000:00 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 tomorrow
    high clouds
    27 °C
    0 mm
    0 %
    N
    9 km/h
    		 high clouds
    28 °C
    0 mm
    0 %
    NE
    9 km/h
    		 high clouds
    28 °C
    0 mm
    0 %
    NE
    9 km/h
    		 high clouds
    28 °C
    0 mm
    0 %
    E
    9 km/h
    		 high clouds
    27 °C
    0 mm
    0 %
    E
    9 km/h
    		 overcast
    25 °C
    0 mm
    0 %
    SE
    8 km/h
    		 high clouds
    22 °C
    0 mm
    0 %
    SE
    6 km/h
    		 overcast
    20 °C
    0 mm
    0 %
    E
    3 km/h
    		 overcast
    19 °C
    0 mm
    0 %
    NE
    1 km/h
    		 overcast
    19 °C
    0 mm
    0 %
    SE
    1 km/h
    		 overcast
    18 °C
    0 mm
    0 %
    NE
    1 km/h
    		 overcast
    17 °C
    0 mm
    0 %
    NE
    1 km/h
    		 high clouds
    16 °C
    0 mm
    0 %
    SE
    1 km/h
    		 high clouds
    15 °C
    0 mm
    0 %
    SE
    1 km/h
    		 high clouds
    15 °C
    0 mm
    0 %
    S
    3 km/h
    		 high clouds
    15 °C
    0 mm
    0 %
    SE
    1 km/h
    		 high clouds
    14 °C
    0 mm
    0 %
    SE
    1 km/h
    		 clear sky
    14 °C
    0 mm
    0 %
    SE
    1 km/h
    		 clear sky
    17 °C
    0 mm
    0 %
    E
    3 km/h
    		 clear sky
    19 °C
    0 mm
    0 %
    NE
    4 km/h
    		 clear sky
    22 °C
    0 mm
    0 %
    NE
    4 km/h
    		 clear sky
    26 °C
    0 mm
    0 %
    NE
    6 km/h
    		 clear sky
    28 °C
    0 mm
    0 %
    NE
    8 km/h
    		 partly cloudy
    30 °C
    0 mm
    0 %
    N
    9 km/h
    		 high clouds
    32 °C
    0 mm
    0 %
    N
    9 km/h

    Forecast

    02:0005:0008:0011:0014:0017:0020:0023:00
    high clouds
    16 °C
    0 mm
    0 %
    SE
    1 km/h
    		 high clouds
    15 °C
    0 mm
    0 %
    SE
    1 km/h
    		 clear sky
    17 °C
    0 mm
    0 %
    E
    3 km/h
    		 clear sky
    26 °C
    0 mm
    0 %
    NE
    6 km/h
    		 high clouds
    32 °C
    0 mm
    0 %
    N
    9 km/h
    		 high clouds
    33 °C
    0 mm
    0 %
    W
    9 km/h
    		 clear sky
    25 °C
    0 mm
    0 %
    SW
    6 km/h
    		 clear sky
    19 °C
    0 mm
    0 %
    SE
    1 km/h

    Meteogram

    1515161312131311111091010102833292322191922242224222324
    35
    30
    25
    20
    15
    10
    5
    Tue
    25
    high clouds    		Wed
    26
    clear sky    		Thu
    27
    mostly cloudy    		Fri
    28
    partly cloudy    		Sat
    29
    clear sky with few clouds    		Sun
    30
    mostly cloudy    		Mon
    31
    overcast    		Tue
    01
    clear sky    		Wed
    02
    clear sky    		Thu
    03
    partly cloudy    		Fri
    04
    clear sky with few clouds    		Sat
    05
    clear sky with few clouds    		Sun
    06
    clear sky with few clouds    		Mon
    07
    clear sky with few clouds

    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