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      Dense Fog Advisory
      until 10:00 AM CDT
      Elev 1795 ft, 45.455 °N 97.366 °W

      Grenville, SD

      Waubay Station69°
      Updated: 4:10 AM CDT on September 19, 2026 (GMT -5)
      9 minutes ago
      60°
      54°
      69
      Feels Like 69
      Cloudy
      N
      7
      Same 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 60°f
         24% Precip. / 0 in
        Cloudy skies with some morning fog. High around 60F. Winds NE at 10 to 15 mph.
        Tonight
        Sun 09/20
        Low 53°f
         24% Precip. / 0 in
        Considerable cloudiness. Low 53F. Winds NE at 5 to 10 mph.
        Tomorrow
        Mon 09/21
        High 61°f48°f
         20% Precip. / 0 in
        Overcast. High 61F. Winds ENE at 10 to 15 mph.
        Hourly Forecast
        Now
        57°
        5AM
        57°
        6AM
        57°
        7AM
        56°
        7:12AM
        Sunrise
        8AM
        16%
        55°
        9AM
        15%
        56°
        10AM
        57°
        11AM
        20%
        57°
        12PM
        22%
        58°
        1PM
        58°
        2PM
        58°
        3PM
        59°
        4PM
        59°
        5PM
        60°
        6PM
        59°
        7PM
        59°
        7:32PM
        Sunset
        8PM
        58°
        9PM
        57°
        10PM
        57°
        11PM
        56°
        12AM
        55°
        1AM
        55°
        2AM
        55°
        3AM
        55°
        4AM
        55°
        Precipitation
        24%
        Pollen
        None
        Air Quality
        20
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.98 in
        2. Visibility 7 miles
        3. Clouds Cloudy
        4. Dew Point56°F
        5. Humidity 96%
        6. Rainfall 0.54 in
        7. Snow Depth 0 in
         KBTN Station History
        Almanac for September 19, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 60°F 72°F 91°F 1984
        4. Low 54°F 51°F 34°F 1991
        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 61°F 71°F 91°F
        4. Low 54°F 50°F 31°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:13 AM 7:32 PM
        3. Civil Twilight 6:43 AM 8:02 PM
        4. Nautical Twilight 6:08 AM 8:37PM
        5. Astronomical Twilight 5:32 AM 9:12 PM
        1. Length of Visible Light 13h 18m
        2. Length of Day 12h 19m
        3. Tomorrow will be 3 minutes 10 seconds shorter
        1. Moon 4:17 PM -
        2. Waxing Gibbous59% 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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