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      Heat Advisory
      until 10:00 PM PDT
      Elev 10 ft, 37.896 °N 121.613 °W

      Discovery Bay, CA

      Discovery Bay Station87°
      Updated: 11:44 AM PDT on October 4, 2026 (GMT -7)
      33 seconds ago
      98°
      62°
      87
      Feels Like 87
      Sunny
      N
      6
      Similar 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 10/05
        High 98°f
         0% Precip. / 0 in
        Sunshine early followed by cloudy skies this afternoon. Hot. High 98F. Winds NNW at 5 to 10 mph.
        Tonight
        Mon 10/05
        Low 63°f
         3% Precip. / 0 in
        Clear skies. Low 63F. Winds WSW at 5 to 10 mph.
        Tomorrow
        Tue 10/06
        High 100°f63°f
         0% Precip. / 0 in
        Sunny skies. Hot. High near 100F. Winds NW at 5 to 10 mph.
        Hourly Forecast
        Now
        87°
        12PM
        89°
        1PM
        91°
        2PM
        93°
        3PM
        94°
        4PM
        96°
        5PM
        96°
        6PM
        93°
        6:44PM
        Sunset
        7PM
        84°
        8PM
        80°
        9PM
        78°
        10PM
        77°
        11PM
        76°
        12AM
        74°
        1AM
        72°
        2AM
        70°
        3AM
        68°
        4AM
        66°
        5AM
        65°
        6AM
        65°
        7AM
        64°
        7:05AM
        Sunrise
        8AM
        68°
        9AM
        76°
        10AM
        81°
        11AM
        87°
        Precipitation
        4%
        Pollen
        Ragweed Pollen
        Low
        Air Quality
        39
        Good
        UV Index
        5
        Moderate
        Additional Conditions
        1. Pressure 29.9 in
        2. Visibility 9 miles
        3. Clouds Clear
        4. Dew Point49°F
        5. Humidity 27%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KTCY Station History
        Almanac for October 4, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 98°F 84°F 102°F 2024
        4. Low 62°F 57°F 43°F 1986
        5. Rain/Snow Depth
        6. Precipitation 0 in 3 in -
        7. Snow 0 in 0 in -
        Almanac for October 5, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 100°F 84°F 100°F
        4. Low 63°F 57°F 40°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:04 AM 6:44 PM
        3. Civil Twilight 6:38 AM 7:10 PM
        4. Nautical Twilight 6:08 AM 7:41PM
        5. Astronomical Twilight 5:37 AM 8:11 PM
        1. Length of Visible Light 12h 32m
        2. Length of Day 11h 39m
        3. Tomorrow will be 2 minutes 25 seconds shorter
        1. Moon 12:22 AM 3:37 PM
        2. Waning Crescent41% of the Moon is Illuminated
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 25
        Full Moon
        Nov 1
        Waning Half Last Qtr
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