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      Elev 195 ft, 38.277 °N 122.061 °W

      Fairfield, CA

      Castle Rock Station59°
      Updated: 4:02 AM PDT on September 19, 2026 (GMT -7)
      3 minutes ago
      87°
      55°
      59
      Feels Like 59
      Fair
      N
      6
      Similar 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
        Sun 09/20
        High 87°f
         15% Precip. / 0 in
        Partly cloudy skies. High 87F. Winds SW at 10 to 15 mph.
        Tonight
        Sun 09/20
        Low 56°f
         7% Precip. / 0 in
        Partly cloudy early with increasing clouds overnight. Low 56F. Winds SW at 10 to 15 mph.
        Tomorrow
        Mon 09/21
        High 78°f55°f
         19% Precip. / 0 in
        More clouds than sun. High 78F. Winds SW at 10 to 15 mph.
        Hourly Forecast
        Now
        57°
        5AM
        57°
        6AM
        56°
        6:53AM
        Sunrise
        7AM
        56°
        8AM
        59°
        9AM
        63°
        10AM
        68°
        11AM
        73°
        12PM
        77°
        1PM
        81°
        2PM
        84°
        3PM
        86°
        4PM
        86°
        5PM
        85°
        6PM
        82°
        7PM
        77°
        7:09PM
        Sunset
        8PM
        71°
        9PM
        68°
        10PM
        66°
        11PM
        63°
        12AM
        62°
        1AM
        61°
        2AM
        60°
        3AM
        59°
        4AM
        58°
        Precipitation
        15%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        42
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.98 in
        2. Visibility 9 miles
        3. Clouds Partly Cloudy
        4. Dew Point52°F
        5. Humidity 84%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSUU Station History
        Almanac for September 19, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 87°F 87°F 103°F 2000
        4. Low 55°F 56°F 43°F 1986
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.2 in -
        7. Snow 0 in 0 in -
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 78°F 86°F 99°F
        4. Low 55°F 56°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:53 AM 7:09 PM
        3. Civil Twilight 6:27 AM 7:36 PM
        4. Nautical Twilight 5:56 AM 8:06PM
        5. Astronomical Twilight 5:24 AM 8:38 PM
        1. Length of Visible Light 13h 8m
        2. Length of Day 12h 16m
        3. Tomorrow will be 2 minutes 28 seconds shorter
        1. Moon 3:28 PM -
        2. Waxing Gibbous60% 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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