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Grant County, SD Weather Forecast
Grant County, SD Weather Forecast Dated: 1244 PM Mon Oct 05 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Monday, October 5, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
66°F 19°C
Sunny
Pleasant near 70°F 21°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds turning from the SE to the S at 18 mph 29 km/h. Gusts up to 35 mph 57 km/h.
Tuesday, October 6, 2026
Mid-Morning
57°F 14°C
Partly Cloudy
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
68°F 20°C
Sunny
Balmy with temperatures reaching 80°F 27°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds switching from the SW to the NNE at 7 mph 11 km/h.
Wednesday, October 7, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
71°F 21°C
Sunny
Early-Evening
62°F 17°C
Overcast
Enjoyable around 71°F 21°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds moving from the NNW to the NNE at 7 mph 12 km/h.
Thursday, October 8, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
59°F 15°C
Overcast
Cool with a high near 63°F 17°C, overcast throughout the day, with steady humidity and steady pressure.
Friday, October 9, 2026
Mid-Morning
53°F 11°C
Cloudy
Mid-Afternoon
66°F 19°C
Partly Cloudy
Early-Evening
60°F 16°C
Sunny
Refreshing around 66°F 19°C, cloudy throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the ENE to the ESE at 13 mph 20 km/h. Gusts up to 26 mph 41 km/h.
Saturday, October 10, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
76°F 25°C
Overcast
Warm and summery near 80°F 27°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds shifting from the S to the SSW at 21 mph 34 km/h. Gusts up to 38 mph 61 km/h.
Sunday, October 11, 2026
Mid-Morning
55°F 13°C
Partly Cloudy
Mid-Afternoon
56°F 13°C
Overcast
Early-Evening
51°F 11°C
Overcast
Chilly near 56°F 13°C, overcast throughout the day, with lower humidity and barometric pressure rising. Winds turning from the NE to the NNE at 17 mph 28 km/h. Gusts up to 25 mph 40 km/h.
Monday, October 12, 2026
Mid-Morning
45°F 7°C
Scattered Showers
Mid-Afternoon
49°F 10°C
Scattered Showers
Early-Evening
48°F 9°C
Scattered Showers
Crisp with a high near 49°F 10°C, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds out of the E at 14 mph 22 km/h. Gusts up to 22 mph 35 km/h.
Tuesday, October 13, 2026
Mid-Morning
42°F 6°C
Scattered Showers
Mid-Afternoon
41°F 5°C
Scattered Showers
Early-Evening
38°F 4°C
Scattered Showers
Cold with a high near 41°F 5°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds moving from the NNW to the NW at 13 mph 20 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, October 14, 2026
Mid-Morning
36°F 2°C
Sunny
Mid-Afternoon
47°F 9°C
Sunny
Early-Evening
41°F 5°C
Sunny
Cool and brisk at 47°F 9°C, sunny throughout the day, with steady humidity and barometric pressure rising. Winds NW at 12 mph 20 km/h.
Thursday, October 15, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
51°F 11°C
Sunny
Early-Evening
45°F 8°C
Sunny
Chilly near 51°F 11°C, sunny throughout the day, with lower humidity and steady pressure.
Friday, October 16, 2026
Mid-Morning
42°F 6°C
Sunny
Mid-Afternoon
57°F 14°C
Sunny
Early-Evening
50°F 10°C
Sunny
Crisp with a high near 57°F 14°C, sunny throughout the day, with steady humidity and steady pressure.
Saturday, October 17, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
54°F 12°C
Sunny
Refreshing around 61°F 16°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds shifting from the SSW to the WSW at 6 mph 10 km/h.
Sunday, October 18, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
59°F 15°C
Sunny
Early-Evening
51°F 11°C
Sunny
Mildly cool near 59°F 15°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.
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