My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Small Craft Advisory
      until 9:00 PM PDT
      Elev 23 ft, 38.291 °N 122.304 °W

      Napa, CA

      Westwood Station73°
      Updated: 5:32 PM PDT on September 15, 2026 (GMT -7)
      9 minutes ago
      78°
      50°
      73
      Feels Like 73
      Sunny
      N
      10
      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
         23% Precip. / 0 in
        Mostly clear early followed by cloudy skies overnight. Low 54F. Winds SSW at 5 to 10 mph.
        Tomorrow
        Thu 09/17
        High 75°f
         20% Precip. / 0 in
        Partly cloudy skies. High around 75F. Winds SSW at 10 to 20 mph.
        Tomorrow night
        Thu 09/17
        Low 57°f
         14% Precip. / 0 in
        Partly cloudy skies during the evening will give way to cloudy skies overnight. Low 57F. Winds SW at 10 to 15 mph.
        Hourly Forecast
        Now
        70°
        6PM
        70°
        7PM
        66°
        7:16PM
        Sunset
        8PM
        61°
        9PM
        60°
        10PM
        58°
        11PM
        57°
        12AM
        56°
        1AM
        57°
        2AM
        57°
        3AM
        57°
        4AM
        56°
        5AM
        56°
        6AM
        56°
        6:51AM
        Sunrise
        7AM
        55°
        8AM
        56°
        9AM
        58°
        10AM
        61°
        11AM
        65°
        12PM
        68°
        1PM
        71°
        2PM
        73°
        3PM
        73°
        4PM
        72°
        5PM
        70°
        Precipitation
        23%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        41
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 29.83 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point54°F
        5. Humidity 57%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KAPC Station History
        Almanac for September 16, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 78°F 85°F 104°F 1913
        4. Low 50°F 53°F 43°F 1936
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.2 in -
        7. Snow 0 in 0 in -
        Almanac for September 17, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 75°F 85°F 102°F
        4. Low 50°F 53°F 42°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:51 AM 7:15 PM
        3. Civil Twilight 6:25 AM 7:41 PM
        4. Nautical Twilight 5:54 AM 8:12PM
        5. Astronomical Twilight 5:22 AM 8:44 PM
        1. Length of Visible Light 13h 16m
        2. Length of Day 12h 23m
        3. Tomorrow will be 2 minutes 28 seconds shorter
        1. Moon 12:48 PM 10:04 PM
        2. Waxing Crescent31% 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
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareersWeather Data APIs
        PWS NetworkWundermap
        Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
        essentialaccessibility.com
        We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
        Review All Privacy and Ad Settings
        Choose how my information is shared
        Data Rights
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary