Union County, SD Hourly Weather Forecast
Next 48 Hours
Mon, May 11th 2026
Sunny skies early, becoming Clear conditions later. Warming trend from 43°F to 79°. Breezy wind, shifting from ENE to S at 12.4 mph, as humidity fluctuates between 32% to 48%, and an avg barometric pressure of 30.05 inHg.
| Mon, May 11th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
2 AM Clear UV: 0 |
47°F Feels 44°F |
48% | 7.8 ENE | 30.24 | 27.6°F | 0% |
3 AM ClearUV: 0 |
45°F Feels 42°F |
48% | 7.6 E | 30.24 | 26.5°F | 0% |
4 AM ClearUV: 0 |
44°F Feels 42°F |
47% | 7.4 ESE | 30.26 | 24.8°F | 0% |
5 AM ClearUV: 0 |
43°F Feels 41°F |
45% | 6.7 ESE | 30.25 | 23.1°F | 0% |
6 AM ClearUV: 0 |
43°F Feels 40°F |
45% | 7.2 ESE | 30.24 | 22.4°F | 0% |
7 AM Sunny UV: 0.2 |
46°F Feels 43°F |
48% | 7.2 SE | 30.24 | 24.2°F | 0% |
8 AM SunnyUV: 0.7 |
51°F Feels 48°F |
44% | 9.6 SE | 30.23 | 28.5°F | 0% |
9 AM SunnyUV: 1.7 |
55°F Feels 54°F |
38% | 11 SE | 30.2 | 30.5°F | 0% |
10 AM SunnyUV: 3.3 |
61°F Feels 60°F |
39% | 11.6 SSE | 30.17 | 35.1°F | 0% |
11 AM SunnyUV: 5.1 |
64°F Feels 64°F |
39% | 12.5 SSE | 30.14 | 39.8°F | 0% |
12 PM SunnyUV: 6.8 |
68°F Feels 68°F |
36% | 13.2 SSE | 30.1 | 40.1°F | 0% |
1 PM Partly Cloudy UV: 7.7 |
71°F Feels 71°F |
34% | 14.5 SSE | 30.06 | 41.9°F | 0% |
2 PM Partly CloudyUV: 7.2 |
74°F Feels 74°F |
34% | 15.4 S | 30.03 | 44°F | 0% |
3 PM Partly CloudyUV: 6.1 |
76°F Feels 76°F |
34% | 15.2 S | 29.99 | 45.9°F | 0% |
4 PM Partly CloudyUV: 4.7 |
78°F Feels 78°F |
33% | 13.9 S | 29.93 | 47.5°F | 0% |
5 PM Partly CloudyUV: 2.6 |
79°F Feels 79°F |
32% | 12.5 S | 29.89 | 47.6°F | 0% |
6 PM Partly CloudyUV: 1.3 |
79°F Feels 78°F |
32% | 13 S | 29.86 | 47.9°F | 0% |
7 PM Partly CloudyUV: 0.5 |
76°F Feels 77°F |
34% | 13.6 S | 29.84 | 47.4°F | 0% |
8 PM Partly CloudyUV: 0.1 |
74°F Feels 76°F |
37% | 14.5 S | 29.82 | 46.1°F | 0% |
9 PM Partly Cloudy UV: 0 |
73°F Feels 75°F |
35% | 17 S | 29.81 | 43.2°F | 0% |
10 PM ClearUV: 0 |
72°F Feels 75°F |
35% | 20.4 S | 29.8 | 42.3°F | 0% |
11 PM ClearUV: 0 |
71°F Feels 71°F |
33% | 21.7 S | 29.79 | 40.3°F | 0% |
Tue, May 12th 2026
Sunny skies giving way to Clear conditions by evening. Warming trend from 58°F to 74°. Windy conditions, shifting from S to NNW at 17 mph, as humidity fluctuates between 25% to 50%, and an avg barometric pressure of 29.9 inHg.
| Tue, May 12th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM ClearUV: 0 |
70°F Feels 70°F |
32% | 21.5 S | 29.77 | 38.6°F | 0% |
1 AM ClearUV: 0 |
69°F Feels 69°F |
32% | 20.8 S | 29.76 | 38°F | 0% |
2 AM Partly CloudyUV: 0 |
68°F Feels 68°F |
35% | 19.7 SSW | 29.75 | 38.9°F | 0% |
3 AM ClearUV: 0 |
67°F Feels 67°F |
34% | 16.1 SSW | 29.77 | 38°F | 0% |
4 AM Partly CloudyUV: 0 |
66°F Feels 66°F |
33% | 14.5 SSW | 29.76 | 36.7°F | 0% |
5 AM ClearUV: 0 |
64°F Feels 64°F |
34% | 13 SSW | 29.76 | 36.5°F | 0% |
6 AM Partly CloudyUV: 0 |
65°F Feels 65°F |
41% | 9.2 W | 29.78 | 38.6°F | 0% |
7 AM Cloudy UV: 0.2 |
65°F Feels 65°F |
47% | 17.4 NW | 29.83 | 44.6°F | 0% |
8 AM SunnyUV: 0.6 |
66°F Feels 66°F |
50% | 15.9 NW | 29.87 | 46.5°F | 0% |
9 AM Partly CloudyUV: 1.6 |
68°F Feels 68°F |
43% | 18.3 NNW | 29.9 | 44.6°F | 0% |
10 AM SunnyUV: 3.1 |
69°F Feels 69°F |
37% | 19.5 NNW | 29.92 | 41.9°F | 0% |
11 AM SunnyUV: 4.9 |
71°F Feels 71°F |
35% | 19.9 NW | 29.93 | 41.9°F | 0% |
12 PM SunnyUV: 6.5 |
72°F Feels 74°F |
32% | 20.8 NW | 29.93 | 41°F | 0% |
1 PM SunnyUV: 7.3 |
74°F Feels 74°F |
29% | 21.3 NW | 29.94 | 39.8°F | 0% |
2 PM SunnyUV: 7.2 |
74°F Feels 74°F |
27% | 21.9 NW | 29.94 | 38.3°F | 0% |
3 PM SunnyUV: 6.1 |
74°F Feels 74°F |
25% | 22.4 NW | 29.95 | 36.5°F | 0% |
4 PM SunnyUV: 4.5 |
74°F Feels 74°F |
25% | 22.4 NW | 29.95 | 36.5°F | 0% |
5 PM SunnyUV: 2.8 |
74°F Feels 74°F |
25% | 22.6 NW | 29.96 | 36.7°F | 0% |
6 PM SunnyUV: 1.4 |
73°F Feels 74°F |
28% | 20.1 NW | 29.98 | 38.6°F | 0% |
7 PM SunnyUV: 0.5 |
70°F Feels 70°F |
30% | 17.7 NW | 29.99 | 38.6°F | 0% |
8 PM SunnyUV: 0.1 |
66°F Feels 66°F |
34% | 12.1 NNW | 30 | 37.9°F | 0% |
9 PM ClearUV: 0 |
62°F Feels 62°F |
39% | 7.6 NW | 30.03 | 36.2°F | 0% |
10 PM ClearUV: 0 |
60°F Feels 59°F |
42% | 7.2 NNW | 30.06 | 36.1°F | 0% |
11 PM ClearUV: 0 |
58°F Feels 57°F |
45% | 6.7 NNW | 30.08 | 36.1°F | 0% |
Wed, May 13th 2026
Clear conditions expected later. Temps range from 55° to 56°. Light winds from the N at 5.7 mph, while humidity ranges from 47% to 49%, and an avg barometric pressure of 30.1 inHg.
| Wed, May 13th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM ClearUV: 0 |
56°F Feels 55°F |
47% | 6 N | 30.09 | 36.2°F | 0% |
1 AM ClearUV: 0 |
55°F Feels 54°F |
49% | 5.4 NNW | 30.1 | 36.2°F | 0% |
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|
46°F |
30.2 inHg.
Barometer 42%
Humidity ENE 7.6mph Wind |
| Clear | ||
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