Union County, SD 14 Day Weather - WeatherWorld.com
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Union County, SD Weather Forecast


Union County, SD Weather Forecast Dated: 123 PM Sun Oct 11 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 11, 2026
Mid-Morning
67°F 19°C
Cloudy
Mid-Afternoon
83°F 29°C
Overcast
Early-Evening
75°F 24°C
Overcast
Warm and summery near 83°F 29°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds out of the S at 15 mph 25 km/h. Gusts up to 21 mph 34 km/h.
Monday, October 12, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
87°F 30°C
Sunny
Early-Evening
71°F 22°C
Sunny
Balmy with temperatures reaching 87°F 30°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the SSE to the NW at 14 mph 21 km/h. Gusts up to 24 mph 38 km/h.
Tuesday, October 13, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
65°F 19°C
Overcast
Enjoyable around 69°F 20°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds moving from the NNE to the N at 11 mph 17 km/h.
Wednesday, October 14, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
58°F 14°C
Sunny
Cool with a high near 64°F 18°C, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the NNE to the ENE at 8 mph 13 km/h.
Thursday, October 15, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
58°F 15°C
Cloudy
Early-Evening
54°F 12°C
Overcast
Refreshing around 58°F 15°C, overcast in the morning, cloudy in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the NE to the NW at 8 mph 13 km/h.
Friday, October 16, 2026
Mid-Morning
44°F 6°C
Sunny
Mid-Afternoon
51°F 10°C
Sunny
Early-Evening
44°F 7°C
Sunny
Cool and brisk at 51°F 10°C, sunny throughout the day, with lower humidity and barometric pressure rising. Winds decreasing from NNW 23 mph 37 km/h to NNW 12 mph 18 km/h. Gusts up to 20 mph 32 km/h.
Saturday, October 17, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
54°F 12°C
Overcast
Early-Evening
49°F 10°C
Sunny
Chilly near 54°F 12°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling. Winds picking up from S at 7 mph 12 km/h to S at 16 mph 25 km/h. Gusts up to 30 mph 49 km/h.
Sunday, October 18, 2026
Mid-Morning
48°F 9°C
Sunny
Mid-Afternoon
65°F 18°C
Cloudy
Early-Evening
58°F 14°C
Overcast
Cool with a high near 65°F 18°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds tapering down from S 20 mph 32 km/h to S 11 mph 17 km/h. Gusts up to 22 mph 34 km/h.
Monday, October 19, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
69°F 21°C
Cloudy
Early-Evening
59°F 15°C
Sunny
Mild temperatures up to 69°F 21°C, partly cloudy throughout the day, with steady humidity and steady pressure. Winds swinging from the ESE to the SE at 11 mph 17 km/h. Gusts up to 23 mph 37 km/h.
Tuesday, October 20, 2026
Mid-Morning
53°F 12°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
67°F 20°C
Sunny
Mild with a high of 69°F 21°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds shifting from the SSE to the S at 18 mph 28 km/h. Gusts up to 32 mph 52 km/h.
Wednesday, October 21, 2026
Mid-Morning
62°F 16°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
63°F 17°C
Sunny
Pleasant near 72°F 22°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the SW to the NNW at 5 mph 8 km/h.
Thursday, October 22, 2026
Mid-Morning
58°F 15°C
Sunny
Mid-Afternoon
74°F 23°C
Overcast
Early-Evening
63°F 18°C
Overcast
Comfortable with temperatures reaching 74°F 23°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds switching from the ESE to the SE at 8 mph 13 km/h.
Friday, October 23, 2026
Mid-Morning
62°F 17°C
Overcast
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
62°F 17°C
Sunny
Enjoyable around 69°F 20°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure.
Saturday, October 24, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
65°F 18°C
Sunny
Mild temperatures up to 71°F 22°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds out of the S at 12 mph 19 km/h.
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