Weather WorldUnion School, SD 14 Day Weather
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Union School, SD Weather Forecast
Union School, SD Weather Forecast Dated: 519 AM Sat Sep 12 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.
Saturday, September 12, 2026
Mid-Morning
53°F 11°C
Scattered Showers
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
59°F 15°C
Cloudy
Refreshing around 63°F 17°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the NNW to the NE at 8 mph 13 km/h.
Sunday, September 13, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
62°F 17°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds switching from the E to the ESE at 21 mph 33 km/h. Gusts up to 33 mph 53 km/h.
Monday, September 14, 2026
Mid-Morning
68°F 20°C
Cloudy
Mid-Afternoon
76°F 24°C
Sunny
Early-Evening
66°F 19°C
Sunny
Enjoyable around 76°F 24°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure rising. Winds moving from the WNW to the NW at 18 mph 29 km/h. Gusts up to 30 mph 48 km/h.
Tuesday, September 15, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
64°F 18°C
Sunny
Mild temperatures up to 70°F 21°C, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the NNW to the ESE at 13 mph 21 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 16, 2026
Mid-Morning
58°F 15°C
Light Showers
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
55°F 13°C
Scattered Showers
Brisk around 56°F 13°C, scattered downpours possible, with increasing humidity and steady pressure. Winds shifting from the ESE to the ENE at 16 mph 26 km/h. Gusts up to 27 mph 44 km/h.
Thursday, September 17, 2026
Mid-Morning
50°F 10°C
Light Showers
Mid-Afternoon
51°F 11°C
Scattered Showers
Early-Evening
50°F 10°C
Scattered Showers
Cool and brisk at 51°F 11°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds decreasing from NE 13 mph 21 km/h to NNW 1 mph 2 km/h.
Friday, September 18, 2026
Mid-Morning
56°F 13°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
65°F 19°C
Sunny
Comfortable with temperatures reaching 70°F 21°C, sunny throughout the day, with lower humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
68°F 20°C
Sunny
Enjoyable around 74°F 23°C, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the SSE to the SE at 8 mph 13 km/h.
Sunday, September 20, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
75°F 24°C
Sunny
Warm temperatures up to 82°F 28°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds moving from the SSE to the SE at 11 mph 17 km/h. Gusts up to 21 mph 34 km/h.
Monday, September 21, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
72°F 22°C
Sunny
Very warm with a high of 81°F 27°C, sunny throughout the day, with steady humidity and steady pressure. Winds decreasing from NW 17 mph 28 km/h to E 6 mph 9 km/h.
Tuesday, September 22, 2026
Mid-Morning
70°F 21°C
Overcast
Mid-Afternoon
78°F 25°C
Cloudy
Early-Evening
68°F 20°C
Sunny
Pleasant near 78°F 25°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds easing from NW 18 mph 29 km/h to N 10 mph 16 km/h.
Wednesday, September 23, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
61°F 16°C
Partly Cloudy
Comfortable with temperatures reaching 68°F 20°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the N to the E at 10 mph 15 km/h.
Thursday, September 24, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
79°F 26°C
Partly Cloudy
Early-Evening
71°F 22°C
Sunny
Enjoyable around 79°F 26°C, sunny in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling. Winds decreasing from SSE 21 mph 34 km/h to SSE 9 mph 14 km/h.
Friday, September 25, 2026
Mid-Morning
50°F 10°C
Overcast
Mid-Afternoon
54°F 12°C
Overcast
Early-Evening
53°F 12°C
Overcast
Cool and brisk at 54°F 12°C, overcast throughout the day, with steady humidity and barometric pressure rising. Winds easing from N 21 mph 33 km/h to ENE 6 mph 9 km/h.
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