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Posey Lake, SD Weather Forecast

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Posey Lake, SD Weather Forecast

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Posey Lake SD weather - Clear - 57°F
Clear
57°F
Updated 5:40 am
Feels Like 52°F
Humidity 78%
Wind W 3 mph
Barometer  30.14 in
Dew Point 50°F
Posey Lake SD weather - Clear - 14°C
Clear
14°C
Updated 5:40 am
Feels Like 11°C
Humidity 78%
Wind W 5 km/h
Barometer  102 kPa
Dew Point 10°C
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Posey Lake Weather Forecast

OVERNIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY
Posey Lake, SD Weather - Overnight Clear Posey Lake, SD Weather - Monday Sunny Posey Lake, SD Weather - Monday Night Clear Posey Lake, SD Weather - Tuesday Sunny Posey Lake, SD Weather - Tuesday Night Clear Posey Lake, SD Weather - Wednesday Sunny Posey Lake, SD Weather - Wednesday Night Mostly Clear Posey Lake, SD Weather - Thursday Mostly Sunny Posey Lake, SD Weather - Thursday Night Partly Cloudy Posey Lake, SD Weather - Friday Mostly Sunny Posey Lake, SD Weather - Friday Night Windy Posey Lake, SD Weather - Saturday Mostly Sunny
Clear Sunny Clear Sunny Clear Sunny Mostly Clear Mostly Sunny Partly Cloudy Mostly Sunny Windy Mostly Sunny
Lo: 55°FLo: 13°C Hi: 85°FHi: 29°C
 Lo: 51°FLo: 11°C Hi: 81°FHi: 27°C
 Lo: 49°FLo: 9°C Hi: 71°FHi: 22°C
 Lo: 50°FLo: 10°C Hi: 70°FHi: 21°C
 Lo: 50°FLo: 10°C Hi: 75°FHi: 24°C
 Lo: 59°FLo: 15°C Hi: 81°FHi: 27°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 AM MDT Mon Oct 05 2026 Posey Lake, SD Weather - WeatherWorld.com

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Posey Lake Forecast Discussion

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Issued: 503 AM MDT Mon Oct 5 2026

Key Messages

  • Mild and dry this week, warmest Monday
  • Next active pattern comes early next week

Discussion

...(This Evening Through Sunday) Issued at 156 PM MDT Sun Oct 4 2026

18Z surface analysis shows high pressure building in the northern Great Plains behind yesterday`s cold front. This combined with visible satellite imagery shows clear skies today. Ongoing ridging over the western CONUS and Rocky Mountains is supporting light rising heights across the northern plains, keeping clouds minimal for t...