Sully Lake, SD 14 Day Weather
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Sully Lake, SD Weather Forecast


Sully Lake, SD Weather Forecast Dated: 1148 AM Fri Sep 11 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Friday, September 11, 2026
Mid-Morning
65°F 19°C
Overcast
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
73°F 23°C
Sunny
Warm and summery near 80°F 27°C, overcast through the afternoon, turning sunny this evening, with lower humidity and barometric pressure rising. Winds picking up from SSE at 11 mph 18 km/h to N at 19 mph 30 km/h. Gusts up to 27 mph 44 km/h.
Saturday, September 12, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
65°F 19°C
Cloudy
Mildly cool near 65°F 18°C, scattered downpours possible, with lower humidity and steady pressure. Winds switching from the NNW to the NNE at 7 mph 11 km/h.
Sunday, September 13, 2026
Mid-Morning
50°F 10°C
Scattered Showers
Mid-Afternoon
56°F 13°C
Light Showers
Early-Evening
56°F 14°C
Scattered Showers
Chilly near 56°F 13°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds moving from the E to the ESE at 12 mph 18 km/h. Gusts up to 26 mph 42 km/h.
Monday, September 14, 2026
Mid-Morning
55°F 13°C
Light Showers
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
71°F 22°C
Sunny
Mild temperatures up to 73°F 23°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds swinging from the SSE to the NW at 14 mph 23 km/h. Gusts up to 23 mph 37 km/h.
Tuesday, September 15, 2026
Mid-Morning
50°F 10°C
Partly Cloudy
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
67°F 19°C
Sunny
Refreshing around 67°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds shifting from the N to the ESE at 6 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
50°F 10°C
Cloudy
Mid-Afternoon
54°F 12°C
Cloudy
Early-Evening
50°F 10°C
Overcast
Cool and brisk at 54°F 12°C, overcast throughout the day, with steady humidity and steady pressure. Winds SSW at 6 mph 9 km/h.
Thursday, September 17, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
66°F 19°C
Sunny
Comfortable at 64°F 18°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds out of the S at 10 mph 16 km/h.
Friday, September 18, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
77°F 25°C
Sunny
Enjoyable around 79°F 26°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the SSW to the ESE at 12 mph 18 km/h. Gusts up to 22 mph 36 km/h.
Saturday, September 19, 2026
Mid-Morning
58°F 15°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
74°F 23°C
Sunny
Mild temperatures up to 72°F 22°C, sunny through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling.
Sunday, September 20, 2026
Mid-Morning
65°F 19°C
Sunny
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
84°F 29°C
Partly Cloudy
Very warm with a high of 84°F 29°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds SSE at 15 mph 24 km/h. Gusts up to 28 mph 45 km/h.
Monday, September 21, 2026
Mid-Morning
72°F 22°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
72°F 22°C
Overcast
Warm and summery near 81°F 27°C, overcast throughout the day, with increasing humidity and barometric pressure falling. Winds out of the S at 23 mph 37 km/h. Gusts up to 31 mph 51 km/h.
Tuesday, September 22, 2026
Mid-Morning
58°F 15°C
Overcast
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
57°F 14°C
Sunny
Cool with a high near 67°F 20°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the NNW to the SE at 15 mph 23 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 23, 2026
Mid-Morning
46°F 8°C
Scattered Showers
Mid-Afternoon
46°F 8°C
Light Showers
Early-Evening
45°F 7°C
Scattered Showers
Brisk around 46°F 8°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure rising. Winds switching from the NE to the ENE at 13 mph 21 km/h. Gusts up to 23 mph 37 km/h.
Thursday, September 24, 2026
Mid-Morning
38°F 4°C
Light Showers
Mid-Afternoon
38°F 3°C
Light Showers
Early-Evening
38°F 3°C
Light Showers
Biting cold near 38°F 3°C, persistent showers off and on through the day, with steady humidity and steady pressure. Winds moving from the ENE to the NE at 11 mph 17 km/h.
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