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      Elev 13 ft, 37.900 °N 121.607 °W

      Discovery Bay, CA

      Discovery Bay Station79°
      Updated: 1:03 PM PDT on September 27, 2026 (GMT -7)
      2 minutes ago
      80°
      55°
      79
      Feels Like 79
      Sunny
      N
      8
      Lower temperature is expected today
      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
        Today
        Mon 09/28
        High 80°f
         1% Precip. / 0 in
        Plentiful sunshine. High near 80F. Winds WSW at 10 to 20 mph.
        Tonight
        Mon 09/28
        Low 51°f
         7% Precip. / 0 in
        Clear skies. Low 51F. Winds WSW at 10 to 15 mph.
        Tomorrow
        Tue 09/29
        High 85°f57°f
         7% Precip. / 0 in
        Sunny. High around 85F. Winds WNW at 10 to 15 mph.
        Hourly Forecast
        Now
        77°
        2PM
        79°
        3PM
        80°
        4PM
        79°
        5PM
        76°
        6PM
        73°
        6:55PM
        Sunset
        7PM
        66°
        8PM
        64°
        9PM
        62°
        10PM
        60°
        11PM
        58°
        12AM
        57°
        1AM
        57°
        2AM
        56°
        3AM
        56°
        4AM
        54°
        5AM
        54°
        6AM
        53°
        6:59AM
        Sunrise
        7AM
        52°
        8AM
        56°
        9AM
        60°
        10AM
        65°
        11AM
        70°
        12PM
        73°
        1PM
        77°
        Precipitation
        8%
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        24
        Good
        UV Index
        6
        High
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point49°F
        5. Humidity 38%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KTCY Station History
        Almanac for September 27, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 80°F 86°F 99°F 2009
        4. Low 55°F 59°F 50°F 1993
        5. Rain/Snow Depth
        6. Precipitation 0 in 2.9 in -
        7. Snow 0 in 0 in -
        Almanac for September 28, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 85°F 86°F 99°F
        4. Low 55°F 59°F 44°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:58 AM 6:55 PM
        3. Civil Twilight 6:32 AM 7:21 PM
        4. Nautical Twilight 6:01 AM 7:51PM
        5. Astronomical Twilight 5:31 AM 8:22 PM
        1. Length of Visible Light 12h 48m
        2. Length of Day 11h 56m
        3. Tomorrow will be 2 minutes 25 seconds shorter
        1. Moon 7:17 PM 8:05 AM
        2. Waning Gibbous97% of the Moon is Illuminated
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 25
        Full Moon
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