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      Small Craft Advisory
      until 9:00 PM PDT
      Elev 23 ft, 38.291 °N 122.304 °W

      Napa, CA

      Westwood Station74°
      Updated: 4:55 PM PDT on September 15, 2026 (GMT -7)
      26 seconds ago
      77°
      51°
      74
      Feels Like 74
      Sunny
      N
      12
      Gusts 18 mph
      Similar temperature is expected tomorrow
      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 09/16
        Low 54°f
         21% Precip. / 0 in
        Mostly clear skies this evening will become overcast overnight. Low 54F. Winds SSW at 10 to 15 mph.
        Tomorrow
        Thu 09/17
        High 74°f
         18% Precip. / 0 in
        Partly cloudy skies. High 74F. Winds SW at 10 to 20 mph.
        Tomorrow night
        Thu 09/17
        Low 57°f
         15% Precip. / 0 in
        Partly cloudy skies early will become overcast later during the night. Low 57F. Winds SW at 10 to 15 mph.
        Hourly Forecast
        Now
        72°
        5PM
        72°
        6PM
        70°
        7PM
        66°
        7:16PM
        Sunset
        8PM
        63°
        9PM
        60°
        10PM
        58°
        11PM
        57°
        12AM
        57°
        1AM
        56°
        2AM
        56°
        3AM
        57°
        4AM
        56°
        5AM
        56°
        6AM
        56°
        6:52AM
        Sunrise
        7AM
        55°
        8AM
        56°
        9AM
        58°
        10AM
        61°
        11AM
        64°
        12PM
        67°
        1PM
        70°
        2PM
        72°
        3PM
        73°
        4PM
        72°
        Precipitation
        21%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        41
        Good
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 29.83 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point54°F
        5. Humidity 53%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KAPC Station History
        Almanac for September 15, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 85°F 106°F 1971
        4. Low 51°F 54°F 41°F 1970
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for September 16, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 85°F 104°F
        4. Low 51°F 53°F 43°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:51 AM 7:16 PM
        3. Civil Twilight 6:24 AM 7:43 PM
        4. Nautical Twilight 5:53 AM 8:14PM
        5. Astronomical Twilight 5:21 AM 8:46 PM
        1. Length of Visible Light 13h 18m
        2. Length of Day 12h 25m
        3. Tomorrow will be 2 minutes 27 seconds shorter
        1. Moon 11:46 AM 9:26 PM
        2. Waxing Crescent22% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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