Lacy, SD 14 Day Weather - WeatherWorld.com
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Lacy, SD Weather Forecast


Lacy, SD Weather Forecast Dated: 645 AM Mon Sep 07 2026
Expect a very warm period with a mix of sun and clouds and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.
Monday, September 7, 2026
Mid-Morning
73°F 23°C
Drizzle
Mid-Afternoon
92°F 33°C
Overcast
Early-Evening
92°F 33°C
Overcast
Very hot with temperatures reaching 92°F 33°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds turning from the SSE to the SW at 14 mph 23 km/h. Gusts up to 28 mph 45 km/h.
Tuesday, September 8, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
79°F 27°C
Sunny
Balmy with temperatures reaching 83°F 28°C, sunny throughout the day, with steady humidity and steady pressure. Winds tapering down from NW 19 mph 31 km/h to N 9 mph 14 km/h.
Wednesday, September 9, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
77°F 25°C
Sunny
Enjoyable around 79°F 26°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds decreasing from NW 14 mph 23 km/h to NE 6 mph 9 km/h.
Thursday, September 10, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
89°F 31°C
Sunny
Early-Evening
87°F 30°C
Sunny
Warm temperatures up to 89°F 31°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the SW to the SSE at 8 mph 13 km/h.
Friday, September 11, 2026
Mid-Morning
68°F 20°C
Cloudy
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
74°F 23°C
Sunny
Mild with a high of 79°F 26°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds tapering down from N 20 mph 32 km/h to NNE 11 mph 17 km/h.
Saturday, September 12, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
49°F 10°C
Overcast
Early-Evening
47°F 8°C
Overcast
Cool and brisk at 49°F 10°C, locally heavy downpours at times, with increasing humidity and barometric pressure rising. Winds turning from the NNE to the NNW at 13 mph 20 km/h.
Sunday, September 13, 2026
Mid-Morning
51°F 10°C
Sunny
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
60°F 15°C
Sunny
Comfortable at 61°F 16°C, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the NNW to the ENE at 8 mph 12 km/h.
Monday, September 14, 2026
Mid-Morning
58°F 14°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
70°F 21°C
Sunny
Enjoyable around 72°F 22°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds building from SSE at 6 mph 10 km/h to ESE at 15 mph 23 km/h. Gusts up to 26 mph 41 km/h.
Tuesday, September 15, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
86°F 30°C
Overcast
Early-Evening
84°F 29°C
Sunny
Warm temperatures up to 86°F 30°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds decreasing from SSE 20 mph 32 km/h to SE 11 mph 18 km/h. Gusts up to 23 mph 37 km/h.
Wednesday, September 16, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
97°F 36°C
Cloudy
Early-Evening
93°F 34°C
Overcast
Very hot with a high of 97°F 36°C, sunny in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds shifting from the SE to the ESE at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Thursday, September 17, 2026
Mid-Morning
72°F 22°C
Overcast
Mid-Afternoon
92°F 34°C
Sunny
Early-Evening
84°F 29°C
Overcast
Very hot with temperatures reaching 92°F 34°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds turning from the W to the NNW at 9 mph 14 km/h.
Friday, September 18, 2026
Mid-Morning
67°F 19°C
Cloudy
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
75°F 24°C
Scattered Showers
Balmy with temperatures reaching 81°F 27°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds NNW at 11 mph 17 km/h. Gusts up to 24 mph 38 km/h.
Saturday, September 19, 2026
Mid-Morning
56°F 13°C
Cloudy
Mid-Afternoon
58°F 14°C
Overcast
Early-Evening
56°F 14°C
Overcast
Refreshing around 58°F 14°C, cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and barometric pressure rising. Winds easing from NNE 16 mph 26 km/h to N 6 mph 10 km/h.
Sunday, September 20, 2026
Mid-Morning
49°F 10°C
Overcast
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
73°F 23°C
Sunny
Mild temperatures up to 73°F 23°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds swinging from the SE to the SSE at 18 mph 29 km/h. Gusts up to 32 mph 52 km/h.
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