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      Elev 20 ft, 37.905 °N 122.522 °W

      Mill Valley, CA

      Horse Hill Station54°
      Updated: 3:56 AM PDT on September 20, 2026 (GMT -7)
      7 minutes ago
      68°
      53°
      54
      Feels Like 54
      Mostly Cloudy
      N
      3
      Lower temperature is expected today
      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
        Today
        Mon 09/21
        High 68°f
         5% Precip. / 0 in
        Cloudy. High 68F. Winds SW at 5 to 10 mph.
        Tonight
        Mon 09/21
        Low 55°f
         21% Precip. / 0 in
        Mostly cloudy. Low around 55F. Winds SW at 5 to 10 mph.
        Tomorrow
        Tue 09/22
        High 67°f54°f
         20% Precip. / 0 in
        Cloudy skies early will become partly cloudy later in the day. High 67F. Winds SW at 10 to 15 mph.
        Hourly Forecast
        Now
        54°
        4AM
        54°
        5AM
        54°
        6AM
        54°
        6:56AM
        Sunrise
        7AM
        55°
        8AM
        56°
        9AM
        58°
        10AM
        60°
        11AM
        62°
        12PM
        63°
        1PM
        64°
        2PM
        66°
        3PM
        67°
        4PM
        67°
        5PM
        66°
        6PM
        65°
        7PM
        62°
        7:09PM
        Sunset
        8PM
        61°
        9PM
        60°
        10PM
        59°
        11PM
        58°
        12AM
        58°
        1AM
        57°
        2AM
        57°
        3AM
        56°
        Precipitation
        21%
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        33
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.91 in
        2. Visibility 5 miles
        3. Clouds Mostly Cloudy
        4. Dew Point53°F
        5. Humidity 98%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KJMC Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 68°F 82°F 102°F 1939
        4. Low 53°F 53°F 40°F 1955
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 67°F 82°F 103°F
        4. Low 53°F 53°F 37°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:56 AM 7:09 PM
        3. Civil Twilight 6:30 AM 7:36 PM
        4. Nautical Twilight 5:59 AM 8:06PM
        5. Astronomical Twilight 5:27 AM 8:37 PM
        1. Length of Visible Light 13h 6m
        2. Length of Day 12h 13m
        3. Tomorrow will be 2 minutes 25 seconds shorter
        1. Moon 4:09 PM 12:40 AM
        2. Waxing Gibbous69% 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
        Precipitation
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