Round Lake, SD 14 Day Weather
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Round Lake, SD Weather Forecast


Round Lake, SD Weather Forecast Dated: 252 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
72°F 22°C
Overcast
Mid-Afternoon
93°F 34°C
Nearby Thunderstorms
Early-Evening
84°F 29°C
Sunny
Very hot with temperatures reaching 93°F 34°C, periods of heavy thunderstorms, with lower humidity and barometric pressure falling. Winds turning from the S to the N at 18 mph 28 km/h. Gusts up to 27 mph 44 km/h.
Saturday, September 12, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
70°F 21°C
Partly Cloudy
Early-Evening
66°F 19°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds switching from the NNW to the N at 10 mph 17 km/h.
Sunday, September 13, 2026
Mid-Morning
53°F 11°C
Overcast
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
61°F 16°C
Overcast
Comfortable at 61°F 16°C, overcast throughout the day, with steady humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
52°F 11°C
Light Showers
Mid-Afternoon
57°F 14°C
Light Showers
Early-Evening
63°F 17°C
Light Fog
Crisp with a high near 57°F 14°C, intermittent showers through midday, easing by evening, with steady humidity and barometric pressure falling. Winds decreasing from SE 19 mph 30 km/h to WSW 7 mph 11 km/h.
Tuesday, September 15, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
65°F 18°C
Partly Cloudy
Mild with a high of 68°F 20°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds easing from NW 15 mph 23 km/h to SE 7 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
54°F 13°C
Overcast
Mildly cool near 64°F 18°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds shifting from the NW to the WNW at 11 mph 19 km/h.
Thursday, September 17, 2026
Mid-Morning
47°F 8°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
62°F 17°C
Sunny
Comfortable at 63°F 17°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds turning from the SE to the SSE at 8 mph 12 km/h.
Friday, September 18, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
75°F 24°C
Sunny
Quite warm around 82°F 28°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds switching from the SSW to the NNE at 14 mph 23 km/h. Gusts up to 24 mph 38 km/h.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
70°F 21°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
62°F 17°C
Overcast
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
80°F 27°C
Sunny
Very warm with a high of 82°F 28°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the SSE to the SE at 11 mph 17 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 21, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
87°F 31°C
Overcast
Early-Evening
80°F 27°C
Overcast
Warm and summery near 87°F 31°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the S at 23 mph 36 km/h. Gusts up to 36 mph 58 km/h.
Tuesday, September 22, 2026
Mid-Morning
59°F 15°C
Scattered Showers
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
65°F 19°C
Sunny
Comfortable with temperatures reaching 70°F 21°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds out of the NNW at 9 mph 14 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 23, 2026
Mid-Morning
51°F 11°C
Scattered Showers
Mid-Afternoon
49°F 10°C
Light Showers
Early-Evening
47°F 8°C
Scattered Showers
Brisk around 49°F 10°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure rising. Winds turning from the ESE to the NNE at 8 mph 13 km/h.
Thursday, September 24, 2026
Mid-Morning
42°F 6°C
Light Showers
Mid-Afternoon
42°F 6°C
Scattered Showers
Early-Evening
41°F 5°C
Scattered Showers
Biting cold near 42°F 6°C, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the NNE to the NE at 10 mph 16 km/h.
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