Weather Alert
Union County State Park Weather Warning NWS WEATHER ALERT FOR THE UNION COUNTY STATE PARK, SD AREA - Issued: 344 AM CDT Thu Aug 20 2026 Union County State Park Weather Warning

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Union County State Park, SD Weather - Hour by Hour Forecast

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Union County State Park, SD Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 84°F29°C, dew point 71°F22°C, humidity 65%. Wind direction is SW at 10 mph16 km/h with visibility of 10 mi16 km. Barometric pressure is 29.96 in1015 mb.
Tonight - Partly cloudy. Scattered showers and thunderstorms this evening. Lows in the lower 60s. Southwest winds 5 to 10 mph. Chance of rai.. Full Forecast
Friday - Mostly sunny. Humid with highs in the mid 80s. North winds around 5 mph... Full Forecast

Union County State Park Hourly Weather

24 Hour Forecast Scroll
Thu, Aug 20
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Union County State Park, SD Hourly Weather - Clear - 6:00 PM Union County State Park, SD Hourly Weather - Clear - 7:00 PM Union County State Park, SD Hourly Weather - Clear - 8:00 PM Union County State Park, SD Hourly Weather - Clear - 9:00 PM Union County State Park, SD Hourly Weather - Clear - 10:00 PM Union County State Park, SD Hourly Weather - Clear - 11:00 PM Union County State Park, SD Hourly Weather - Clear - 12:00 AM Union County State Park, SD Hourly Weather - Clear - 1:00 AM Union County State Park, SD Hourly Weather - Clear - 2:00 AM Union County State Park, SD Hourly Weather - Clear - 3:00 AM Union County State Park, SD Hourly Weather - Clear - 4:00 AM Union County State Park, SD Hourly Weather - Clear - 5:00 AM Union County State Park, SD Hourly Weather - Clear - 6:00 AM Union County State Park, SD Hourly Weather - Clear - 7:00 AM Union County State Park, SD Hourly Weather - Clear - 8:00 AM Union County State Park, SD Hourly Weather - Clear - 9:00 AM Union County State Park, SD Hourly Weather - Clear - 10:00 AM Union County State Park, SD Hourly Weather - Clear - 11:00 AM Union County State Park, SD Hourly Weather - Clear - 12:00 PM Union County State Park, SD Hourly Weather - Clear - 1:00 PM Union County State Park, SD Hourly Weather - Clear - 2:00 PM Union County State Park, SD Hourly Weather - Clear - 3:00 PM Union County State Park, SD Hourly Weather - Clear - 4:00 PM Union County State Park, SD Hourly Weather - Clear - 5:00 PM
Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear
85°F29°C 84°F29°C 81°F27°C 77°F25°C 74°F23°C 72°F22°C 71°F22°C 69°F21°C 68°F20°C 67°F19°C 66°F19°C 65°F18°C 65°F18°C 64°F18°C 68°F20°C 72°F22°C 76°F24°C 79°F26°C 82°F28°C 85°F29°C 86°F30°C 88°F31°C 89°F32°C 88°F31°C
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3% 3% 8% 8% 8% 8% 8% 8% 4% 4% 4% 4% 4% 4% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1%
66°F19°C 66°F19°C 66°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 66°F19°C 65°F18°C 64°F18°C 63°F17°C 63°F17°C 62°F17°C 63°F17°C 64°F18°C 65°F18°C 64°F18°C 63°F17°C 62°F17°C 62°F17°C 61°F16°C 61°F16°C 62°F17°C
53% 55% 60% 71% 79% 84% 87% 93% 93% 93% 93% 93% 93% 93% 84% 76% 69% 60% 53% 46% 45% 41% 39% 42%
SW SSE SW SW SW SW SSW SSW SSW SSW SSW W W W WNW NW NW NNW NNW NNW NNW NNW NNW NNW
10 mph 10 mph 10 mph 6 mph 6 mph 6 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 5 mph 5 mph 5 mph 5 mph 5 mph 5 mph 6 mph 6 mph 6 mph 6 mph 6 mph 6 mph
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Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
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Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KYKN model statistics.

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Prob Precip % = Probability of Precipitation.

Union County State Park 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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