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) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
9 PM ClearUV: 0 |
57°F Feels 56°F Dew Point 20.4°F |
24% | 6.3 WSW | 29.6 | 20.4°F | 0% |
10 PM ClearUV: 0 |
56°F Feels 54°F Dew Point 20.8°F |
25% | 12.3 WSW | 29.59 | 20.8°F | 0% |
11 PM ClearUV: 0 |
55°F Feels 53°F Dew Point 21.7°F |
27% | 19 WSW | 29.59 | 21.7°F | 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) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM ClearUV: 0 |
54°F Feels 51°F Dew Point 23°F |
30% | 20.8 WSW | 29.59 | 23°F | 0% |
1 AM ClearUV: 0 |
53°F Feels 49°F Dew Point 23.3°F |
31% | 20.8 WSW | 29.58 | 23.3°F | 0% |
2 AM ClearUV: 0 |
51°F Feels 47°F Dew Point 23.5°F |
33% | 21.9 WSW | 29.57 | 23.5°F | 0% |
3 AM ClearUV: 0 |
51°F Feels 46°F Dew Point 23.8°F |
35% | 24.2 WSW | 29.56 | 23.8°F | 0% |
4 AM ClearUV: 0 |
50°F Feels 45°F Dew Point 24.8°F |
38% | 23.5 WSW | 29.56 | 24.8°F | 0% |
5 AM ClearUV: 0 |
49°F Feels 43°F Dew Point 26.4°F |
41% | 24.2 WSW | 29.56 | 26.4°F | 0% |
6 AM ClearUV: 0 |
48°F Feels 42°F Dew Point 27.2°F |
44% | 24.2 WSW | 29.57 | 27.2°F | 0% |
7 AM SunnyUV: 0.2 |
48°F Feels 42°F Dew Point 27.6°F |
46% | 22.4 WSW | 29.57 | 27.6°F | 0% |
8 AM SunnyUV: 0.7 |
49°F Feels 43°F Dew Point 28.9°F |
48% | 19.5 WSW | 29.59 | 28.9°F | 0% |
9 AM SunnyUV: 1.8 |
51°F Feels 46°F Dew Point 31.1°F |
48% | 18.3 WSW | 29.59 | 31.1°F | 0% |
10 AM SunnyUV: 3.2 |
54°F Feels 50°F Dew Point 33.8°F |
47% | 18.1 WSW | 29.57 | 33.8°F | 0% |
11 AM SunnyUV: 4.1 |
57°F Feels 55°F Dew Point 35.5°F |
45% | 17.2 WSW | 29.57 | 35.5°F | 0% |
12 PM SunnyUV: 4.9 |
59°F Feels 58°F Dew Point 37.2°F |
42% | 16.1 WSW | 29.56 | 37.2°F | 0% |
1 PM SunnyUV: 5.5 |
61°F Feels 61°F Dew Point 35.6°F |
39% | 15.7 WSW | 29.55 | 35.6°F | 0% |
2 PM SunnyUV: 4.9 |
63°F Feels 63°F Dew Point 33.9°F |
34% | 15.4 SW | 29.52 | 33.9°F | 0% |
3 PM SunnyUV: 3.2 |
64°F Feels 64°F Dew Point 32.7°F |
30% | 16.6 SW | 29.48 | 32.7°F | 0% |
4 PM Scattered ThunderstormsUV: 2.5 |
63°F Feels 63°F Dew Point 31.7°F |
29% | 13.9 SW | 29.46 | 31.7°F | 0% |
5 PM Scattered ThunderstormsUV: 1.3 |
59°F Feels 58°F Dew Point 33.9°F |
35% | 14.3 SSW | 29.45 | 33.9°F | 0% |
6 PM Scattered ThunderstormsUV: 0.4 |
54°F Feels 52°F Dew Point 37.6°F |
50% | 2.2 WNW | 29.52 | 37.6°F | 0% |
7 PM Light Rain ShowerUV: 0.1 |
47°F Feels 42°F Dew Point 40.5°F |
70% | 8.3 N | 29.58 | 40.5°F | 100% Rain est. 0.05in |
8 PM Light Rain ShowerUV: 0 |
42°F Feels 34°F Dew Point 32.8°F |
75% | 6.7 N | 29.7 | 32.8°F | 100% Rain est. 0.03in |
9 PM Light Rain ShowerUV: 0 |
36°F Feels 26°F Dew Point 29°F |
77% | 7.8 NNW | 29.76 | 29°F | 100% Rain est. 0.01in |
10 PM CloudyUV: 0 |
36°F Feels 27°F Dew Point 25.2°F |
79% | 7.4 NW | 29.82 | 25.2°F | 0% |
11 PM Scattered ShowersUV: 0 |
32°F Feels 22°F Dew Point 31.2°F |
85% | 7.8 NW | 29.76 | 31.2°F | 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) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM CloudyUV: 0 |
30°F Feels 19°F Dew Point 23.9°F |
82% | 8.1 NNW | 29.88 | 23.9°F | 0% |
1 AM OvercastUV: 0 |
28°F Feels 17°F Dew Point 23.4°F |
83% | 6.9 NNW | 29.89 | 23.4°F | 0% |
2 AM Moderate Or Heavy Snow ShowersUV: 0 |
27°F Feels 16°F Dew Point 23.2°F |
87% | 5.6 NW | 29.94 | 23.2°F | 100% Rain est. 0.06in Snow est. 0.5in |
3 AM Moderate Or Heavy Snow ShowersUV: 0 |
26°F Feels 16°F Dew Point 23°F |
88% | 7.6 NW | 29.96 | 23°F | 100% Rain est. 0.09in Snow est. 0.7in |
4 AM Heavy SnowUV: 0 |
27°F Feels 17°F Dew Point 22.9°F |
90% | 7.2 NW | 29.98 | 22.9°F | 100% Rain est. 0.13in Snow est. 0.9in |
5 AM Heavy SnowUV: 0 |
27°F Feels 18°F Dew Point 23.2°F |
86% | 6 NW | 29.98 | 23.2°F | 100% Rain est. 0.06in Snow est. 0.5in |
6 AM Heavy SnowUV: 0 |
28°F Feels 19°F Dew Point 23.3°F |
84% | 5.8 NW | 29.97 | 23.3°F | 100% Rain est. 0.03in Snow est. 0.2in |
7 AM OvercastUV: 0.1 |
27°F Feels 18°F Dew Point 23.5°F |
82% | 7.8 NNW | 29.97 | 23.5°F | 0% |
8 AM OvercastUV: 0.4 |
27°F Feels 17°F Dew Point 17.9°F |
70% | 8.9 NNW | 30.01 | 17.9°F | 0% |
9 AM OvercastUV: 0.7 |
26°F Feels 15°F Dew Point 15.2°F |
63% | 9.8 NW | 30.02 | 15.2°F | 0% |
10 AM OvercastUV: 1.2 |
27°F Feels 17°F Dew Point 12.4°F |
57% | 10.5 NW | 30.04 | 12.4°F | 0% |
11 AM OvercastUV: 2 |
29°F Feels 18°F Dew Point 12.7°F |
52% | 12.3 NW | 30.01 | 12.7°F | 0% |
12 PM OvercastUV: 2.9 |
30°F Feels 20°F Dew Point 12.8°F |
49% | 13.6 NW | 29.99 | 12.8°F | 0% |
1 PM OvercastUV: 4 |
32°F Feels 23°F Dew Point 13°F |
46% | 16.3 NW | 29.98 | 13°F | 0% |
2 PM OvercastUV: 4.4 |
35°F Feels 26°F Dew Point 11.8°F |
38% | 17.2 WNW | 29.95 | 11.8°F | 0% |
3 PM OvercastUV: 3 |
37°F Feels 28°F Dew Point 11.2°F |
35% | 17 NW | 29.94 | 11.2°F | 0% |
4 PM Partly CloudyUV: 1.5 |
38°F Feels 29°F Dew Point 10.7°F |
31% | 17.7 NW | 29.93 | 10.7°F | 0% |
5 PM Partly CloudyUV: 1.1 |
38°F Feels 30°F Dew Point 10.5°F |
31% | 17.2 NW | 29.96 | 10.5°F | 0% |
6 PM Partly CloudyUV: 0.5 |
38°F Feels 30°F Dew Point 10.4°F |
31% | 15.4 NW | 29.98 | 10.4°F | 0% |
7 PM SunnyUV: 0.1 |
35°F Feels 27°F Dew Point 10.3°F |
31% | 12.3 NW | 30 | 10.3°F | 0% |
8 PM ClearUV: 0 |
32°F Feels 24°F Dew Point 8.6°F |
37% | 11.2 NW | 30.08 | 8.6°F | 0% |
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| 59°F |
29.59 inHg.
Barometer 23%
Humidity WSW 5.4mph Wind |
|
| Clear | ||
