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      Elev 1331 ft, 38.388 °N 122.433 °W

      Napa, CA

      Updated: 1:04 AM PDT on September 5, 2026 (GMT -7)
      26 seconds ago
      53°
      50°
      56
      Feels Like 56
      Fair
      N
      1
      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
        Tonight
        Sat 09/05
        Low 42°f
        15% Precip. / 0 in
        Mostly clear. Low 42F. Winds light and variable.
        Tomorrow
        Sun 09/06
        High 70°f
        16% Precip. / 0 in
        Mostly sunny. High around 70F. Winds SW at 10 to 20 mph.
        Tomorrow night
        Sun 09/06
        Low 42°f
        20% Precip. / 0 in
        A few clouds overnight. Low 42F. Winds W at 10 to 15 mph.
        Hourly Forecast
        Now
        56°
        2AM
        54°
        3AM
        53°
        4AM
        51°
        5AM
        49°
        6AM
        48°
        6:43AM
        Sunrise
        7AM
        49°
        8AM
        52°
        9AM
        52°
        10AM
        57°
        11AM
        61°
        12PM
        63°
        1PM
        66°
        2PM
        68°
        3PM
        68°
        4PM
        68°
        5PM
        66°
        6PM
        64°
        7PM
        60°
        7:32PM
        Sunset
        8PM
        56°
        9PM
        53°
        10PM
        52°
        11PM
        50°
        12AM
        49°
        1AM
        47°
        Additional Conditions
        1. Pressure 29.96 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point49°F
        5. Humidity 78%
        6. Rainfall 0 in
        7. Snow Depth 0 in
        KAPC Station History
        Almanac for September 5, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 53°F 86°F 108°F 2022
        4. Low 50°F 52°F 40°F 1969
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.5 in -
        7. Snow 0 in 0 in -
        Almanac for September 6, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 65°F 86°F 109°F
        4. Low 50°F 52°F 42°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:42 AM 7:33 PM
        3. Civil Twilight 6:15 AM 7:59 PM
        4. Nautical Twilight 5:44 AM 8:31PM
        5. Astronomical Twilight 5:11 AM 9:04 PM
        1. Length of Visible Light 13h 44m
        2. Length of Day 12h 50m
        3. Tomorrow will be 2 minutes 25 seconds shorter
        1. Moon 12:13 AM 4:09 PM
        2. Waning Crescent38% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
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        Weather Alerts
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