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      Elev 489 ft, 37.377 °N 122.220 °W

      Portola Valley, CA

      Westridge Station81°
      Updated: 5:55 PM PDT on September 23, 2026 (GMT -7)
      6 minutes ago
      87°
      52°
      81
      Feels Like 81
      Sunny
      N
      6
      Lower temperature is expected tomorrow
      Wundermap
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Thu 09/24
        Low 56°f
         2% Precip. / 0 in
        Generally clear skies. Low 56F. Winds E at 5 to 10 mph.
        Tomorrow
        Fri 09/25
        High 82°f
         2% Precip. / 0 in
        Intervals of clouds and sunshine. High 82F. Winds NW at 5 to 10 mph.
        Tomorrow night
        Fri 09/25
        Low 56°f
         20% Precip. / 0 in
        Partly cloudy. Low 56F. Winds NW at 5 to 10 mph.
        Hourly Forecast
        Now
        82°
        6PM
        81°
        7PM
        74°
        7:03PM
        Sunset
        8PM
        69°
        9PM
        64°
        10PM
        63°
        11PM
        62°
        12AM
        60°
        1AM
        60°
        2AM
        59°
        3AM
        59°
        4AM
        59°
        5AM
        58°
        6AM
        58°
        6:58AM
        Sunrise
        7AM
        57°
        8AM
        61°
        9AM
        67°
        10AM
        72°
        11AM
        77°
        12PM
        79°
        1PM
        79°
        2PM
        80°
        3PM
        79°
        4PM
        77°
        5PM
        74°
        Precipitation
        2%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        44
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 9 miles
        3. Clouds Partly Cloudy
        4. Dew Point57°F
        5. Humidity 43%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KPAO Station History
        Almanac for September 24, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 87°F 86°F 100°F 1997
        4. Low 52°F 50°F 42°F 1996
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 25, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 82°F 86°F 101°F
        4. Low 52°F 50°F 40°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:58 AM 7:02 PM
        3. Civil Twilight 6:32 AM 7:28 PM
        4. Nautical Twilight 6:02 AM 7:58PM
        5. Astronomical Twilight 5:31 AM 8:29 PM
        1. Length of Visible Light 12h 55m
        2. Length of Day 12h 3m
        3. Tomorrow will be 2 minutes 22 seconds shorter
        1. Moon 6:03 PM 4:50 AM
        2. Waxing Gibbous96% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
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