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      Elev 256 ft, 38.502 °N 122.473 °W

      St. Helena, CA

      St. Helena Station60°
      Updated: 8:05 PM PDT on October 20, 2026 (GMT -7)
      10 minutes ago
      74°
      44°
      60
      Feels Like 60
      Partly Cloudy
      N
      2
      Same temperature is expected tomorrow
      Wundermap

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       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
        Wed 10/21
        Low 51°f
         2% Precip. / 0 in
        Partly cloudy skies this evening will become overcast overnight. Low 51F. Winds light and variable.
        Tomorrow
        Thu 10/22
        High 73°f
         15% Precip. / 0 in
        Cloudy skies. Slight chance of a rain shower. High 73F. Winds light and variable.
        Tomorrow night
        Thu 10/22
        Low 52°f
         20% Precip. / 0 in
        Overcast. Slight chance of a rain shower. Low 52F. Winds light and variable.
        Hourly Forecast
        Now
        62°
        9PM
        60°
        10PM
        59°
        11PM
        58°
        12AM
        57°
        1AM
        57°
        2AM
        57°
        3AM
        56°
        4AM
        54°
        5AM
        53°
        6AM
        53°
        7AM
        52°
        7:24AM
        Sunrise
        8AM
        52°
        9AM
        57°
        10AM
        62°
        11AM
        65°
        12PM
        67°
        1PM
        70°
        2PM
        71°
        3PM
        72°
        4PM
        71°
        5PM
        70°
        6PM
        67°
        6:23PM
        Sunset
        7PM
        63°
        8PM
        61°
        Precipitation
        15%
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        31
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.85 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point43°F
        5. Humidity 49%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSTS Station History
        Almanac for October 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 77°F 95°F 2022
        4. Low 44°F 49°F 27°F 1949
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.8 in -
        7. Snow 0 in 0 in -
        Almanac for October 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 73°F 76°F 98°F
        4. Low 51°F 49°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:24 AM 6:24 PM
        3. Civil Twilight 6:57 AM 6:51 PM
        4. Nautical Twilight 6:26 AM 7:22PM
        5. Astronomical Twilight 5:55 AM 7:52 PM
        1. Length of Visible Light 11h 54m
        2. Length of Day 11h 0m
        3. Tomorrow will be 2 minutes 21 seconds shorter
        1. Moon 3:41 PM 1:30 AM
        2. Waxing Gibbous71% of the Moon is Illuminated
        Oct 25
        Full Moon
        Nov 1
        Waning Half Last Qtr
        Nov 8
        New Moon
        Nov 17
        Waxing Half First Qtr
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