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Johnson Dam, SD Weather Forecast

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Johnson Dam, SD Weather Forecast

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Johnson Dam SD weather - Overcast - 62°F
Overcast
62°F
Updated 8:06 pm
Feels Like 51°F
Humidity 83%
Wind ENE 8 mph
Barometer  30.04 in
Dew Point 57°F
Johnson Dam SD weather - Overcast - 17°C
Overcast
17°C
Updated 8:06 pm
Feels Like 10°C
Humidity 83%
Wind ENE 13 km/h
Barometer  101.7 kPa
Dew Point 14°C
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Johnson Dam Weather Forecast

TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY
Johnson Dam, SD Weather - Tonight Cloudy Johnson Dam, SD Weather - Saturday Chance Of Showers Johnson Dam, SD Weather - Saturday Night Showers Johnson Dam, SD Weather - Sunday Showers Johnson Dam, SD Weather - Sunday Night Chance Of Showers Johnson Dam, SD Weather - Monday Chance Of Showers Johnson Dam, SD Weather - Monday Night Mostly Cloudy Johnson Dam, SD Weather - Tuesday Partly Cloudy Johnson Dam, SD Weather - Tuesday Night Partly Cloudy Johnson Dam, SD Weather - Wednesday Clearing Johnson Dam, SD Weather - Wednesday Night Chance Of T-Storm Johnson Dam, SD Weather - Thursday Clearing
Cloudy Chance of Showers Showers Showers Chance of Showers Chance of Showers Mostly Cloudy Partly Cloudy Partly Cloudy Clearing Chance of T-Storm Clearing
Lo: 51°FLo: 11°C Hi: 65°FHi: 18°C
 Lo: 50°FLo: 10°C Hi: 59°FHi: 15°C
 Lo: 49°FLo: 9°C Hi: 61°FHi: 16°C
 Lo: 49°FLo: 9°C Hi: 69°FHi: 21°C
 Lo: 51°FLo: 11°C Hi: 75°FHi: 24°C
 Lo: 51°FLo: 11°C Hi: 79°FHi: 26°C
POP: 50% POP: 70% POP: 90% POP: 70% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 537 PM MDT Fri Sep 18 2026 Johnson Dam, SD Weather - WeatherWorld.com

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Johnson Dam Forecast Discussion

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Issued: 544 PM MDT Fri Sep 18 2026

Key Messages

  • Cool and wet this weekend, with daily precipitation in the region.
  • Gradual warmup early next week.

Discussion

...(This Evening Through Friday) Issued at 213 PM MDT Fri Sep 18 2026

Current Water Vapor and upper air models show southwest flow over the forecast area, as upper low digs into the Rockies. 18Z surface analysis depicts a low over southeastern SD, with frontal boundary stretching into central Nebraska. Winds are generally light out of the north, with temperatures in the 60s to u...