Summit Reservoir, SD 14 Day Weather
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Summit Reservoir, SD Weather Forecast


Summit Reservoir, SD Weather Forecast Dated: 157 AM Sun Oct 18 2026
Expect a cool pattern with plenty of sunshine and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Sunday, October 18, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
61°F 16°C
Sunny
Pleasant near 69°F 20°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds picking up from NNW at 1 mph 1 km/h to NE at 12 mph 19 km/h. Gusts up to 26 mph 41 km/h.
Monday, October 19, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
59°F 15°C
Sunny
Mildly cool near 64°F 18°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds switching from the NE to the ESE at 9 mph 14 km/h.
Tuesday, October 20, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
66°F 19°C
Sunny
Enjoyable around 72°F 22°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds moving from the SSE to the SE at 11 mph 17 km/h. Gusts up to 23 mph 36 km/h.
Wednesday, October 21, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
66°F 19°C
Sunny
Mild temperatures up to 72°F 22°C, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the SW to the N at 4 mph 7 km/h.
Thursday, October 22, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
78°F 26°C
Cloudy
Early-Evening
73°F 23°C
Overcast
Mild with a high of 78°F 26°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds blowing from the SSE at 12 mph 19 km/h. Gusts up to 29 mph 47 km/h.
Friday, October 23, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
73°F 23°C
Overcast
Warm and summery near 82°F 28°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds decreasing from SSE 13 mph 21 km/h to ESE 4 mph 7 km/h.
Saturday, October 24, 2026
Mid-Morning
42°F 6°C
Drizzle
Mid-Afternoon
46°F 8°C
Scattered Showers
Early-Evening
44°F 7°C
Sunny
Chilly near 46°F 8°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds easing from NW 23 mph 37 km/h to NW 10 mph 16 km/h.
Sunday, October 25, 2026
Mid-Morning
41°F 5°C
Sunny
Mid-Afternoon
53°F 12°C
Sunny
Early-Evening
49°F 10°C
Sunny
Crisp with a high near 53°F 12°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds moving from the W to the SSE at 9 mph 14 km/h.
Monday, October 26, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
57°F 14°C
Sunny
Refreshing around 64°F 18°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling. Winds swinging from the SSW to the SSE at 9 mph 14 km/h.
Tuesday, October 27, 2026
Mid-Morning
49°F 10°C
Overcast
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
63°F 18°C
Sunny
Mild with a high of 68°F 20°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds shifting from the SSE to the S at 7 mph 12 km/h.
Wednesday, October 28, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
72°F 22°C
Partly Cloudy
Early-Evening
66°F 19°C
Overcast
Pleasant near 72°F 22°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the SW to the WSW at 8 mph 12 km/h.
Thursday, October 29, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
54°F 13°C
Sunny
Cool with a high near 61°F 16°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the WNW to the W at 9 mph 14 km/h.
Friday, October 30, 2026
Mid-Morning
48°F 9°C
Sunny
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
62°F 17°C
Sunny
Refreshing around 67°F 19°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds out of the SSW at 11 mph 18 km/h. Gusts up to 22 mph 36 km/h.
Saturday, October 31, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
49°F 10°C
Overcast
Mildly cool near 61°F 16°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds swinging from the SSE to the WNW at 16 mph 26 km/h. Gusts up to 26 mph 42 km/h.
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