10-Day Weather Forecast - Gann Valley, SD

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  • 93|68°F
    Mostly Sunny

    Today

    93°F

    Mostly sunny. Hot with highs in the mid 90s. South winds 15 to 20 mph with gusts up to 30 mph.

    Tonight

    68°F

    Mostly cloudy with a 50 percent chance of thunderstorms. Humid with lows in the upper 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph becoming north 10 to 15 mph after midnight.

    Hourly details
  • 79|63°F
    Partly Sunny

    Day

    79°F

    Mostly cloudy with a slight chance of thunderstorms in the morning then partly sunny in the afternoon. Not as warm. Humid with highs in the lower 80s. North winds around 10 mph with gusts up to 20 mph. Chance of rain 20 percent.

    Night

    63°F

    Partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.

    Hourly details
  • 82|65°F
    Partly Sunny

    Day

    82°F

    Partly sunny. Highs in the mid 80s. East winds 5 to 10 mph.

    Night

    65°F

    Partly cloudy with a 20 percent chance of thunderstorms. Lows in the lower 60s.

    Hourly details
  • 88|68°F
    Mostly Sunny

    Day

    88°F

    Mostly clear. Hot. Highs around 90. Lows in the upper 60s.

    Night

    68°F

    Mostly clear. Hot. Highs around 90. Lows in the upper 60s.

    Hourly details
  • 94|71°F
    Unknown

    Day

    94°F

    Mostly clear. Hot. Highs in the mid 90s. Lows around 70.

    Night

    71°F

    Mostly clear. Hot. Highs in the mid 90s. Lows around 70.

    Hourly details
  • 100|75°F
    Unknown

    Day

    100°F

    Mostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.

    Night

    75°F

    Mostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.

    Hourly details
  • 100|74°F
    Unknown

    Day

    100°F

    Mostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.

    Night

    74°F

    Clear with scattered thunderstorms. Chance of storms 40%. Low temperature around 74F. Dew point will be around 60F with an average humidity of 46%. Winds will be 12 mph from the S.

  • 98|70°F
    Sunny

    Day

    98°F

    Sunny with scattered thunderstorms. Chance of storms 40%. High temperature around 98F. Dew point will be around 61F with an average humidity of 46%. Winds will be 5 mph from the S.

    Night

    70°F

    Clear with scattered thunderstorms. Chance of storms 50%. Low temperature around 70F. Dew point will be around 59F with an average humidity of 47%. Winds will be 6 mph from the E.

  • 89|68°F
    Sunny

    Day

    89°F

    Sunny with numerous thunderstorms. Chance of storms 65%. High temperature around 89F. Dew point will be around 60F with an average humidity of 53%. Winds will be 4 mph from the SE.

    Night

    68°F

    Clear with numerous thunderstorms. Chance of storms 75%. Low temperature around 68F. Dew point will be around 59F with an average humidity of 53%. Winds will be 5 mph from the E.

  • 90|67°F
    Sunny

    Day

    90°F

    Sunny with numerous thunderstorms. Chance of storms 75%. High temperature around 90F. Dew point will be around 60F with an average humidity of 53%. Winds will be 4 mph from the SE.

    Night

    67°F

    Clear with scattered thunderstorms. Chance of storms 35%. Low temperature around 67F. Dew point will be around 58F with an average humidity of 53%. Winds will be 4 mph from the SE.