Opal Lake, SD 14 Day Weather
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Opal Lake, SD Weather Forecast


Opal Lake, SD Weather Forecast Dated: 828 PM Mon Sep 21 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Monday, September 21, 2026
Mid-Morning
54°F 12°C
Drizzle
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
55°F 13°C
Overcast
Brisk around 56°F 13°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the ESE to the SE at 13 mph 20 km/h.
Tuesday, September 22, 2026
Mid-Morning
55°F 13°C
Partly Cloudy
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
60°F 15°C
Partly Cloudy
Mildly cool near 65°F 18°C, partly cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds blowing from the SE at 19 mph 31 km/h. Gusts up to 30 mph 48 km/h.
Wednesday, September 23, 2026
Mid-Morning
61°F 16°C
Light Showers
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
72°F 22°C
Overcast
Quite warm around 80°F 27°C, morning showers, giving way to clearing skies, with lower humidity and steady pressure. Winds moving from the SE to the NW at 8 mph 13 km/h.
Thursday, September 24, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
79°F 26°C
Cloudy
Early-Evening
71°F 22°C
Overcast
Mild temperatures up to 79°F 26°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the NNE to the SE at 8 mph 12 km/h.
Friday, September 25, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
77°F 25°C
Cloudy
Early-Evening
68°F 20°C
Overcast
Mild with a high of 77°F 25°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds shifting from the ESE to the SE at 18 mph 30 km/h. Gusts up to 30 mph 49 km/h.
Saturday, September 26, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
63°F 17°C
Sunny
Pleasant near 70°F 21°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with steady humidity and barometric pressure rising. Winds decreasing from NW 21 mph 33 km/h to N 10 mph 16 km/h.
Sunday, September 27, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
74°F 24°C
Overcast
Early-Evening
72°F 22°C
Overcast
Comfortable with temperatures reaching 74°F 24°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds switching from the SE to the SSE at 18 mph 29 km/h. Gusts up to 36 mph 57 km/h.
Monday, September 28, 2026
Mid-Morning
73°F 23°C
Overcast
Mid-Afternoon
72°F 22°C
Cloudy
Early-Evening
63°F 18°C
Overcast
Enjoyable around 72°F 22°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure rising. Winds moving from the SSW to the WNW at 19 mph 31 km/h. Gusts up to 29 mph 47 km/h.
Tuesday, September 29, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
61°F 16°C
Overcast
Refreshing around 65°F 18°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds decreasing from WNW 17 mph 27 km/h to NE 7 mph 12 km/h.
Wednesday, September 30, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
64°F 18°C
Nearby Thunderstorms
Early-Evening
57°F 14°C
Nearby Thunderstorms
Mildly cool near 64°F 18°C, periods of heavy thunderstorms, with lower humidity and barometric pressure rising. Winds shifting from the NNE to the NNW at 15 mph 23 km/h. Gusts up to 24 mph 38 km/h.
Thursday, October 1, 2026
Mid-Morning
50°F 10°C
Scattered Showers
Mid-Afternoon
59°F 15°C
Sunny
Early-Evening
55°F 13°C
Partly Cloudy
Comfortable at 59°F 15°C, scattered downpours possible, with lower humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
68°F 20°C
Overcast
Early-Evening
62°F 16°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds turning from the SE to the ESE at 22 mph 35 km/h. Gusts up to 35 mph 56 km/h.
Saturday, October 3, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
64°F 18°C
Overcast
Enjoyable around 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure. Winds switching from the SE to the ESE at 19 mph 31 km/h. Gusts up to 30 mph 48 km/h.
Sunday, October 4, 2026
Mid-Morning
53°F 12°C
Overcast
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
55°F 13°C
Partly Cloudy
Mildly cool near 61°F 16°C, overcast through the afternoon, turning sunny this evening, with steady humidity and steady pressure. Winds moving from the ENE to the SE at 7 mph 12 km/h.
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