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Sylvan Lake, SD Hourly Weather Forecast

Next 48 Hours

Wed, Apr 15th 2026

Clear conditions expected later. Temps range from 55° to 57°. Breezy wind from the WSW at 12.5 mph, with humidity ranging 24% to 27%, and an avg barometric pressure of 29.59 inHg.
Wed, Apr 15th Temp Humidity Wind (mph) Pressure (inHg) Precip.
9 PM Clear at 9 PM on Wed, Apr 15th 2026
Clear
UV: 0
57°F

Feels
56°F
24% 6.3 WSW 29.6 0%
10 PM Clear at 10 PM on Wed, Apr 15th 2026
Clear
UV: 0
56°F

Feels
54°F
25% 12.3 WSW 29.59 0%
11 PM Clear at 11 PM on Wed, Apr 15th 2026
Clear
UV: 0
55°F

Feels
53°F
27% 19 WSW 29.59 0%

Thu, Apr 16th 2026

Sunny skies in the morning, with Clear conditions expected by night. Rain forecasted to be light rain shower (up to 0.05in), scattered showers (up to 0.00in). Warming trend from 32°F to 64°. Windy conditions, shifting from WSW to NW at 16.1 mph, as humidity ranges 29% to 85%, and an avg barometric pressure of 29.59 inHg.
Thu, Apr 16th Temp Humidity Wind (mph) Pressure (inHg) Precip.
12 AM Clear at 12 AM on Thu, Apr 16th 2026
Clear
UV: 0
54°F

Feels
51°F
30% 20.8 WSW 29.59 0%
1 AM Clear at 1 AM on Thu, Apr 16th 2026
Clear
UV: 0
53°F

Feels
49°F
31% 20.8 WSW 29.58 0%
2 AM Clear at 2 AM on Thu, Apr 16th 2026
Clear
UV: 0
51°F

Feels
47°F
33% 21.9 WSW 29.57 0%
3 AM Clear at 3 AM on Thu, Apr 16th 2026
Clear
UV: 0
51°F

Feels
46°F
35% 24.2 WSW 29.56 0%
4 AM Clear at 4 AM on Thu, Apr 16th 2026
Clear
UV: 0
50°F

Feels
45°F
38% 23.5 WSW 29.56 0%
5 AM Clear at 5 AM on Thu, Apr 16th 2026
Clear
UV: 0
49°F

Feels
43°F
41% 24.2 WSW 29.56 0%
6 AM Clear at 6 AM on Thu, Apr 16th 2026
Clear
UV: 0
48°F

Feels
42°F
44% 24.2 WSW 29.57 0%
7 AM Sunny at 7 AM on Thu, Apr 16th 2026
Sunny
UV: 0.2
48°F

Feels
42°F
46% 22.4 WSW 29.57 0%
8 AM Sunny at 8 AM on Thu, Apr 16th 2026
Sunny
UV: 0.7
49°F

Feels
43°F
48% 19.5 WSW 29.59 0%
9 AM Sunny at 9 AM on Thu, Apr 16th 2026
Sunny
UV: 1.8
51°F

Feels
46°F
48% 18.3 WSW 29.59 0%
10 AM Sunny at 10 AM on Thu, Apr 16th 2026
Sunny
UV: 3.2
54°F

Feels
50°F
47% 18.1 WSW 29.57 0%
11 AM Sunny at 11 AM on Thu, Apr 16th 2026
Sunny
UV: 4.1
57°F

Feels
55°F
45% 17.2 WSW 29.57 0%
12 PM Sunny at 12 PM on Thu, Apr 16th 2026
Sunny
UV: 4.9
59°F

Feels
58°F
42% 16.1 WSW 29.56 0%
1 PM Sunny at 1 PM on Thu, Apr 16th 2026
Sunny
UV: 5.5
61°F

Feels
61°F
39% 15.7 WSW 29.55 0%
2 PM Sunny at 2 PM on Thu, Apr 16th 2026
Sunny
UV: 4.9
63°F

Feels
63°F
34% 15.4 SW 29.52 0%
3 PM Sunny at 3 PM on Thu, Apr 16th 2026
Sunny
UV: 3.2
64°F

Feels
64°F
30% 16.6 SW 29.48 0%
4 PM Scattered Thunderstorms at 4 PM on Thu, Apr 16th 2026
Scattered Thunderstorms
UV: 2.5
63°F

Feels
63°F
29% 13.9 SW 29.46 0%
5 PM Scattered Thunderstorms at 5 PM on Thu, Apr 16th 2026
Scattered Thunderstorms
UV: 1.3
59°F

Feels
58°F
35% 14.3 SSW 29.45 0%
6 PM Scattered Thunderstorms at 6 PM on Thu, Apr 16th 2026
Scattered Thunderstorms
UV: 0.4
54°F

Feels
52°F
50% 2.2 WNW 29.52 0%
7 PM Light Rain Shower at 7 PM on Thu, Apr 16th 2026
Light Rain Shower
UV: 0.1
47°F

Feels
42°F
70% 8.3 N 29.58 100%

Rain est. 0.05in
8 PM Light Rain Shower at 8 PM on Thu, Apr 16th 2026
Light Rain Shower
UV: 0
42°F

Feels
34°F
75% 6.7 N 29.7 100%

Rain est. 0.03in
9 PM Light Rain Shower at 9 PM on Thu, Apr 16th 2026
Light Rain Shower
UV: 0
36°F

Feels
26°F
77% 7.8 NNW 29.76 100%

Rain est. 0.01in
10 PM Cloudy at 10 PM on Thu, Apr 16th 2026
Cloudy
UV: 0
36°F

Feels
27°F
79% 7.4 NW 29.82 0%
11 PM Scattered Showers at 11 PM on Thu, Apr 16th 2026
Scattered Showers
UV: 0
32°F

Feels
22°F
85% 7.8 NW 29.76 80%

Fri, Apr 17th 2026

Skies will shift from Overcast conditions to moderate or heavy snow showers as the day goes on. Rain forecasted to be moderate or heavy snow showers (up to 0.09in), heavy snow (up to 0.13in). Snow forecasted to be moderate or heavy snow showers (up to 0.70in), heavy snow (up to 0.90in). Temps range from 26° to 38°. Breezy wind, shifting from NNW to NW at 11.2 mph, as humidity ranges 31% to 90%, and an avg barometric pressure of 29.97 inHg.
Fri, Apr 17th Temp Humidity Wind (mph) Pressure (inHg) Precip.
12 AM Cloudy at 12 AM on Fri, Apr 17th 2026
Cloudy
UV: 0
30°F

Feels
19°F
82% 8.1 NNW 29.88 0%
1 AM Overcast at 1 AM on Fri, Apr 17th 2026
Overcast
UV: 0
28°F

Feels
17°F
83% 6.9 NNW 29.89 0%
2 AM Moderate Or Heavy Snow Showers at 2 AM on Fri, Apr 17th 2026
Moderate Or Heavy Snow Showers
UV: 0
27°F

Feels
16°F
87% 5.6 NW 29.94 100%

Rain est. 0.06in

Snow est. 0.5in
3 AM Moderate Or Heavy Snow Showers at 3 AM on Fri, Apr 17th 2026
Moderate Or Heavy Snow Showers
UV: 0
26°F

Feels
16°F
88% 7.6 NW 29.96 100%

Rain est. 0.09in

Snow est. 0.7in
4 AM Heavy Snow at 4 AM on Fri, Apr 17th 2026
Heavy Snow
UV: 0
27°F

Feels
17°F
90% 7.2 NW 29.98 100%

Rain est. 0.13in

Snow est. 0.9in
5 AM Heavy Snow at 5 AM on Fri, Apr 17th 2026
Heavy Snow
UV: 0
27°F

Feels
18°F
86% 6 NW 29.98 100%

Rain est. 0.06in

Snow est. 0.5in
6 AM Heavy Snow at 6 AM on Fri, Apr 17th 2026
Heavy Snow
UV: 0
28°F

Feels
19°F
84% 5.8 NW 29.97 100%

Rain est. 0.03in

Snow est. 0.2in
7 AM Overcast at 7 AM on Fri, Apr 17th 2026
Overcast
UV: 0.1
27°F

Feels
18°F
82% 7.8 NNW 29.97 0%
8 AM Overcast at 8 AM on Fri, Apr 17th 2026
Overcast
UV: 0.4
27°F

Feels
17°F
70% 8.9 NNW 30.01 0%
9 AM Overcast at 9 AM on Fri, Apr 17th 2026
Overcast
UV: 0.7
26°F

Feels
15°F
63% 9.8 NW 30.02 0%
10 AM Overcast at 10 AM on Fri, Apr 17th 2026
Overcast
UV: 1.2
27°F

Feels
17°F
57% 10.5 NW 30.04 0%
11 AM Overcast at 11 AM on Fri, Apr 17th 2026
Overcast
UV: 2
29°F

Feels
18°F
52% 12.3 NW 30.01 0%
12 PM Overcast at 12 PM on Fri, Apr 17th 2026
Overcast
UV: 2.9
30°F

Feels
20°F
49% 13.6 NW 29.99 0%
1 PM Overcast at 1 PM on Fri, Apr 17th 2026
Overcast
UV: 4
32°F

Feels
23°F
46% 16.3 NW 29.98 0%
2 PM Overcast at 2 PM on Fri, Apr 17th 2026
Overcast
UV: 4.4
35°F

Feels
26°F
38% 17.2 WNW 29.95 0%
3 PM Overcast at 3 PM on Fri, Apr 17th 2026
Overcast
UV: 3
37°F

Feels
28°F
35% 17 NW 29.94 0%
4 PM Partly Cloudy at 4 PM on Fri, Apr 17th 2026
Partly Cloudy
UV: 1.5
38°F

Feels
29°F
31% 17.7 NW 29.93 0%
5 PM Partly Cloudy at 5 PM on Fri, Apr 17th 2026
Partly Cloudy
UV: 1.1
38°F

Feels
30°F
31% 17.2 NW 29.96 0%
6 PM Partly Cloudy at 6 PM on Fri, Apr 17th 2026
Partly Cloudy
UV: 0.5
38°F

Feels
30°F
31% 15.4 NW 29.98 0%
7 PM Sunny at 7 PM on Fri, Apr 17th 2026
Sunny
UV: 0.1
35°F

Feels
27°F
31% 12.3 NW 30 0%
8 PM Clear at 8 PM on Fri, Apr 17th 2026
Clear
UV: 0
32°F

Feels
24°F
37% 11.2 NW 30.08 0%

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Currently

Clear 59°F
29.59 inHg.
Barometer
23%
Humidity
WSW 5.4mph
Wind
Clear

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