Johnson County, IA Weather Forecast

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Johnson County, IA Weather Forecast

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Johnson County IA weather  - Clear - 52°F
Clear
52°F
Updated 4:27 am
Feels Like 51°F
Humidity 89%
Wind N 0 mph
Barometer  30.01 in
Dew Point 49°F
Johnson County IA weather  - Clear - 11°C
Clear
11°C
Updated 4:27 am
Feels Like 11°C
Humidity 89%
Wind N 0 km/h
Barometer  101.6 kPa
Dew Point 9°C

Johnson County Weather Forecast

REST OF TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY SATURDAY SUNDAY MONDAY
Johnson County, IA Weather - Rest Of Tonight Partly Cloudy Johnson County, IA Weather - Tuesday Partly Sunny Johnson County, IA Weather - Tuesday Night Showers Likely Johnson County, IA Weather - Wednesday Showers Johnson County, IA Weather - Wednesday Night Chance Of T-Storm Johnson County, IA Weather - Thursday Showers Johnson County, IA Weather - Thursday Night Showers Johnson County, IA Weather - Friday Partly Cloudy Johnson County, IA Weather - Saturday Partly Cloudy Johnson County, IA Weather - Sunday Mostly Clear Johnson County, IA Weather - Monday Mostly Clear
Partly Cloudy Partly Sunny Showers Likely Showers Chance of T-Storm Showers Showers Partly Cloudy Partly Cloudy Mostly Clear Mostly Clear
Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
Lo: 65°FLo: 18°C Hi: 71°FHi: 22°C
Lo: 65°FLo: 18°C Hi: 65°FHi: 18°C
Lo: 55°FLo: 13°C Hi: 65°FHi: 18°C
Lo: 50°FLo: 10°C
Hi: 65°FHi: 18°C
Lo: 50°FLo: 10°C
Hi: 65°FHi: 18°C
Lo: 49°FLo: 9°C
Hi: 65°FHi: 18°C
Lo: 49°FLo: 9°C
POP: 70% POP: 100% POP: 100% POP: 100% POP: 70%
POP = Probability of Precipitation.
Weather Outlook Updated: 126 AM CDT Tue Sep 29 2026 Johnson County, IA Weather - WeatherWorld.com

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Issued: 146 AM CDT Tue Sep 29 2026

Key Messages

  • Active stretch of weather through midweek, as an approaching system brings rounds of rainfall. Heavy rainfall is expected, with the potential for areal flooding and rises along area rivers.
  • Drier weather returns late this week and through the weekend, with cool and pleasant weather.

Aviation

/06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1227 AM CDT Tue Sep 29 2026

VFR conditions will prevail through the TAF period, with light and variable winds prior to 12z. After 12z, winds will increa...