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Rousseau, SD Weather Forecast
Rousseau, SD Weather Forecast Dated: 1133 PM Wed Sep 16 2026
Expect a mild stretch with more clouds than sun and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Wednesday, September 16, 2026
Mid-Morning
54°F 12°C
Scattered Showers
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
66°F 19°C
Overcast
Refreshing around 66°F 19°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds turning from the SE to the ESE at 12 mph 19 km/h.
Thursday, September 17, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
76°F 24°C
Overcast
Early-Evening
73°F 23°C
Overcast
Comfortable with temperatures reaching 76°F 24°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds switching from the ENE to the E at 14 mph 22 km/h. Gusts up to 22 mph 35 km/h.
Friday, September 18, 2026
Mid-Morning
60°F 15°C
Light Showers
Mid-Afternoon
57°F 14°C
Scattered Showers
Early-Evening
56°F 14°C
Overcast
Chilly near 57°F 14°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds decreasing from NE 18 mph 29 km/h to N 10 mph 17 km/h.
Saturday, September 19, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
56°F 14°C
Scattered Showers
Crisp with a high near 56°F 13°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds swinging from the NNE to the ENE at 10 mph 15 km/h.
Sunday, September 20, 2026
Mid-Morning
53°F 12°C
Scattered Showers
Mid-Afternoon
54°F 12°C
Light Showers
Early-Evening
55°F 13°C
Light Showers
Brisk around 54°F 12°C, scattered downpours possible, with steady humidity and steady pressure. Winds blowing from the ESE at 6 mph 10 km/h.
Monday, September 21, 2026
Mid-Morning
51°F 11°C
Overcast
Mid-Afternoon
55°F 13°C
Scattered Showers
Early-Evening
54°F 12°C
Scattered Showers
Cool and brisk at 55°F 13°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds turning from the E to the ESE at 12 mph 20 km/h.
Tuesday, September 22, 2026
Mid-Morning
53°F 12°C
Light Showers
Mid-Afternoon
74°F 24°C
Nearby Thunderstorms
Early-Evening
78°F 26°C
Partly Cloudy
Comfortable with temperatures reaching 74°F 24°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds switching from the SE to the SSE at 14 mph 22 km/h. Gusts up to 26 mph 42 km/h.
Wednesday, September 23, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
80°F 27°C
Nearby Thunderstorms
Early-Evening
84°F 29°C
Nearby Thunderstorms
Quite warm around 80°F 27°C, locally heavy thunderstorms at times, with lower humidity and steady pressure. Winds moving from the SSE to the E at 6 mph 9 km/h.
Thursday, September 24, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
68°F 20°C
Scattered Showers
Early-Evening
63°F 17°C
Light Showers
Mild temperatures up to 68°F 20°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds ENE at 14 mph 23 km/h. Gusts up to 22 mph 35 km/h.
Friday, September 25, 2026
Mid-Morning
61°F 16°C
Heavy Rain Showers
Mid-Afternoon
61°F 16°C
Heavy Rain Showers
Early-Evening
60°F 16°C
Light Showers
Mildly cool near 61°F 16°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds shifting from the ESE to the ENE at 15 mph 24 km/h. Gusts up to 23 mph 37 km/h.
Saturday, September 26, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
58°F 14°C
Scattered Showers
Early-Evening
57°F 14°C
Overcast
Comfortable at 58°F 14°C, scattered downpours possible, with steady humidity and steady pressure. Winds turning from the E to the SE at 11 mph 18 km/h.
Sunday, September 27, 2026
Mid-Morning
60°F 16°C
Partly Cloudy
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
78°F 26°C
Sunny
Comfortable with temperatures reaching 76°F 25°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the SSE to the SE at 10 mph 16 km/h. Gusts up to 20 mph 31 km/h.
Monday, September 28, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
82°F 28°C
Partly Cloudy
Early-Evening
85°F 30°C
Overcast
Quite warm around 82°F 28°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the SSE to the SE at 12 mph 20 km/h. Gusts up to 26 mph 41 km/h.
Tuesday, September 29, 2026
Mid-Morning
74°F 24°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
78°F 26°C
Sunny
Warm temperatures up to 86°F 30°C, sunny throughout the day, with lower humidity and steady pressure. Winds building from SSE at 13 mph 21 km/h to W at 21 mph 34 km/h. Gusts up to 35 mph 57 km/h.
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