10-Day Weather Forecast - Gann Valley, SD
- 93|68°FMostly SunnyHourly details
Today
93°FMostly sunny. Hot with highs in the mid 90s. South winds 15 to 20 mph with gusts up to 30 mph.
Tonight
68°FMostly 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.
- 79|63°FPartly SunnyHourly details
Day
79°FMostly 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°FPartly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.
- 82|65°FPartly SunnyHourly details
Day
82°FPartly sunny. Highs in the mid 80s. East winds 5 to 10 mph.
Night
65°FPartly cloudy with a 20 percent chance of thunderstorms. Lows in the lower 60s.
- 88|68°FMostly SunnyHourly details
Day
88°FMostly clear. Hot. Highs around 90. Lows in the upper 60s.
Night
68°FMostly clear. Hot. Highs around 90. Lows in the upper 60s.
Weekend Weather
- 94|71°FUnknownHourly details
Day
94°FMostly clear. Hot. Highs in the mid 90s. Lows around 70.
Night
71°FMostly clear. Hot. Highs in the mid 90s. Lows around 70.
- 100|75°FUnknownHourly details
Day
100°FMostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.
Night
75°FMostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.
- 100|74°FUnknown
Day
100°FMostly clear. Hot. Highs around 100. Lows in the lower 70s. Heat index values up to 100.
Night
74°FClear 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°FSunny
Day
98°FSunny 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°FClear 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°FSunny
Day
89°FSunny 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°FClear 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°FSunny
Day
90°FSunny 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°FClear 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.













