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Argonne, SD Weather Forecast
Argonne, SD Weather Forecast Dated: 353 AM Wed Sep 16 2026
Expect a cool pattern with more clouds than sun and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 16, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
60°F 16°C
Scattered Showers
Early-Evening
60°F 16°C
Overcast
Refreshing around 60°F 16°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure falling. Winds turning from the SE to the SSE at 12 mph 19 km/h.
Thursday, September 17, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
64°F 18°C
Light Showers
Early-Evening
62°F 17°C
Scattered Showers
Mildly cool near 64°F 18°C, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the E to the ENE at 13 mph 21 km/h. Gusts up to 24 mph 38 km/h.
Friday, September 18, 2026
Mid-Morning
60°F 15°C
Overcast
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
62°F 17°C
Light Fog
Comfortable at 61°F 16°C, overcast throughout the day, with steady humidity and steady pressure. Winds decreasing from ENE 14 mph 23 km/h to NE 6 mph 10 km/h.
Saturday, September 19, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
58°F 15°C
Overcast
Cool with a high near 64°F 18°C, overcast throughout the day, with steady humidity and steady pressure. Winds swinging from the NE to the ENE at 8 mph 14 km/h.
Sunday, September 20, 2026
Mid-Morning
58°F 14°C
Scattered Showers
Mid-Afternoon
58°F 14°C
Light Showers
Early-Evening
56°F 14°C
Scattered Showers
Refreshing around 58°F 14°C, scattered downpours possible, with steady humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
52°F 11°C
Light Fog
Mid-Afternoon
52°F 11°C
Scattered Showers
Early-Evening
52°F 11°C
Scattered Showers
Cool and brisk at 52°F 11°C, locally heavy downpours at times, with steady humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
67°F 19°C
Partly Cloudy
Comfortable at 66°F 19°C, partly cloudy through the afternoon, turning sunny this evening, with lower humidity and barometric pressure falling.
Wednesday, September 23, 2026
Mid-Morning
56°F 14°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Light Showers
Early-Evening
61°F 16°C
Sunny
Cool with a high near 61°F 16°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds shifting from the NE to the NW at 17 mph 27 km/h. Gusts up to 32 mph 51 km/h.
Thursday, September 24, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
62°F 17°C
Sunny
Refreshing around 63°F 17°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the NNW to the ENE at 6 mph 9 km/h.
Friday, September 25, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
74°F 24°C
Sunny
Early-Evening
74°F 23°C
Sunny
Mild with a high of 74°F 24°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds out of the S at 16 mph 25 km/h. Gusts up to 26 mph 42 km/h.
Saturday, September 26, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
81°F 27°C
Sunny
Warm and summery near 81°F 27°C, overcast in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds blowing from the S at 22 mph 35 km/h. Gusts up to 43 mph 69 km/h.
Sunday, September 27, 2026
Mid-Morning
75°F 24°C
Cloudy
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
82°F 28°C
Overcast
Balmy with temperatures reaching 88°F 31°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds decreasing from S 19 mph 31 km/h to ESE 9 mph 15 km/h.
Monday, September 28, 2026
Mid-Morning
70°F 21°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
69°F 21°C
Scattered Showers
Enjoyable around 79°F 26°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds shifting from the SE to the W at 18 mph 29 km/h. Gusts up to 29 mph 47 km/h.
Tuesday, September 29, 2026
Mid-Morning
48°F 9°C
Overcast
Mid-Afternoon
59°F 15°C
Sunny
Early-Evening
59°F 15°C
Sunny
Mildly cool near 59°F 15°C, overcast in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds tapering down from WNW 18 mph 29 km/h to SSE 8 mph 12 km/h.
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