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Mount Vernon, SD Weather Forecast
Mount Vernon, SD Weather Forecast Dated: 738 AM Tue Sep 22 2026
Expect a mild stretch with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Tuesday, September 22, 2026
Mid-Morning
49°F 9°C
Light Fog
Mid-Afternoon
55°F 13°C
Scattered Showers
Early-Evening
54°F 12°C
Scattered Showers
Brisk around 55°F 13°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds out of the SE at 13 mph 21 km/h. Gusts up to 22 mph 36 km/h.
Wednesday, September 23, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
66°F 19°C
Scattered Showers
Early-Evening
63°F 17°C
Light Showers
Mildly cool near 66°F 19°C, scattered downpours possible, with lower humidity and steady pressure. Winds switching from the SE to the SSE at 19 mph 30 km/h. Gusts up to 33 mph 54 km/h.
Thursday, September 24, 2026
Mid-Morning
58°F 14°C
Scattered Showers
Mid-Afternoon
60°F 15°C
Scattered Showers
Early-Evening
57°F 14°C
Overcast
Comfortable at 60°F 15°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds SSE at 13 mph 21 km/h. Gusts up to 21 mph 34 km/h.
Friday, September 25, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
60°F 16°C
Scattered Showers
Early-Evening
63°F 17°C
Overcast
Cool with a high near 60°F 16°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds out of the SE at 10 mph 16 km/h. Gusts up to 25 mph 40 km/h.
Saturday, September 26, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
76°F 24°C
Scattered Showers
Early-Evening
67°F 20°C
Overcast
Mild with a high of 76°F 24°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the SSE to the N at 8 mph 13 km/h.
Sunday, September 27, 2026
Mid-Morning
60°F 15°C
Partly Cloudy
Mid-Afternoon
67°F 19°C
Overcast
Early-Evening
70°F 21°C
Overcast
Mildly cool near 67°F 19°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with increasing humidity and barometric pressure falling. Winds turning from the NNE to the SE at 9 mph 14 km/h.
Monday, September 28, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
71°F 22°C
Light Showers
Comfortable with temperatures reaching 75°F 24°C, drier conditions through late afternoon before showers move in, with lower humidity and steady pressure. Winds easing from S 19 mph 31 km/h to NW 10 mph 16 km/h.
Tuesday, September 29, 2026
Mid-Morning
56°F 14°C
Sunny
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
67°F 19°C
Sunny
Cool with a high near 67°F 20°C, sunny throughout the day, with steady humidity and steady pressure.
Wednesday, September 30, 2026
Mid-Morning
58°F 14°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
72°F 22°C
Sunny
Mild temperatures up to 73°F 23°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the SSE to the SE at 14 mph 23 km/h. Gusts up to 28 mph 45 km/h.
Thursday, October 1, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
78°F 26°C
Overcast
Early-Evening
78°F 26°C
Overcast
Mild with a high of 78°F 26°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds S at 17 mph 27 km/h. Gusts up to 33 mph 54 km/h.
Friday, October 2, 2026
Mid-Morning
65°F 19°C
Light Showers
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
74°F 23°C
Sunny
Pleasant near 75°F 24°C, scattered morning showers before drying out later, with lower humidity and steady pressure.
Saturday, October 3, 2026
Mid-Morning
61°F 16°C
Light Fog
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
71°F 21°C
Sunny
Comfortable with temperatures reaching 72°F 22°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds picking up from ESE at 5 mph 8 km/h to SE at 13 mph 20 km/h. Gusts up to 23 mph 37 km/h.
Sunday, October 4, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
58°F 15°C
Overcast
Early-Evening
55°F 13°C
Partly Cloudy
Refreshing around 58°F 15°C, cloudy through the afternoon, turning sunny this evening, with steady humidity and barometric pressure rising. Winds turning from the S to the W at 26 mph 41 km/h. Gusts up to 46 mph 74 km/h.
Monday, October 5, 2026
Mid-Morning
51°F 10°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
63°F 17°C
Sunny
Mildly cool near 64°F 18°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds decreasing from WNW 19 mph 31 km/h to SSW 7 mph 11 km/h.
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