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      Elev 489 ft, 37.377 °N 122.220 °W

      Portola Valley, CA

      Westridge Station82°
      Updated: 5:15 PM PDT on September 23, 2026 (GMT -7)
      5 minutes ago
      86°
      54°
      82
      Feels Like 82
      Sunny
      N
      8
      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 57°f
         4% Precip. / 0 in
        Mostly clear. Low 57F. Winds NE at 5 to 10 mph.
        Tomorrow
        Fri 09/25
        High 83°f
         5% Precip. / 0 in
        Partly cloudy skies. High 83F. Winds NNW at 10 to 15 mph.
        Tomorrow night
        Fri 09/25
        Low 58°f
         20% Precip. / 0 in
        Partly cloudy. Low 58F. Winds NW at 5 to 10 mph.
        Hourly Forecast
        Now
        84°
        6PM
        81°
        7PM
        74°
        7:03PM
        Sunset
        8PM
        69°
        9PM
        65°
        10PM
        63°
        11PM
        62°
        12AM
        60°
        1AM
        62°
        2AM
        61°
        3AM
        60°
        4AM
        60°
        5AM
        60°
        6AM
        59°
        6:58AM
        Sunrise
        7AM
        58°
        8AM
        62°
        9AM
        66°
        10AM
        71°
        11AM
        75°
        12PM
        78°
        1PM
        80°
        2PM
        81°
        3PM
        80°
        4PM
        79°
        5PM
        76°
        Precipitation
        5%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        44
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 9 miles
        3. Clouds Partly Cloudy
        4. Dew Point56°F
        5. Humidity 39%
        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 86°F 86°F 100°F 1997
        4. Low 54°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 83°F 86°F 101°F
        4. Low 54°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
        Nearby Weather Stations
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