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Johnston, IA Weather Forecast

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Johnston, IA Weather Forecast

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Johnston IA weather - Mostly Cloudy - 57°F
Mostly Cloudy
57°F
Updated 11:06 pm
Feels Like 53°F
Humidity 100%
Wind N 0 mph
Barometer  30.27 in
Dew Point 57°F
Johnston IA weather - Mostly Cloudy - 14°C
Mostly Cloudy
14°C
Updated 11:06 pm
Feels Like 12°C
Humidity 100%
Wind N 0 km/h
Barometer  102.5 kPa
Dew Point 14°C
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Johnston Weather Forecast

TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Johnston, IA Weather - Tonight Mostly Cloudy Johnston, IA Weather - Sunday Partly Sunny Johnston, IA Weather - Sunday Night Chance Of Showers Johnston, IA Weather - Monday Chance Of T-Storm Johnston, IA Weather - Monday Night Chance Of T-Storm Johnston, IA Weather - Tuesday Chance Of T-Storm Johnston, IA Weather - Tuesday Night Chance Of Showers Johnston, IA Weather - Wednesday Chance Of Showers Johnston, IA Weather - Wednesday Night Chance Of Showers Johnston, IA Weather - Thursday Chance Of Showers Johnston, IA Weather - Thursday Night Chance Of Showers Johnston, IA Weather - Friday Chance Of Showers
Mostly Cloudy Partly Sunny Chance of Showers Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Chance of Showers Chance of Showers Chance of Showers Chance of Showers Chance of Showers
Lo: 51°FLo: 11°C Hi: 69°FHi: 21°C
 Lo: 59°FLo: 15°C Hi: 69°FHi: 21°C
 Lo: 59°FLo: 15°C Hi: 69°FHi: 21°C
 Lo: 45°FLo: 7°C Hi: 60°FHi: 16°C
 Lo: 45°FLo: 7°C Hi: 60°FHi: 16°C
 Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
POP: 40% POP: 100% POP: 100% POP: 70% POP: 50% POP: 30% POP: 20% POP: 20% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 722 PM CDT Sat Oct 31 2026 Johnston, IA Weather - WeatherWorld.com

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Issued: 1042 PM CDT Sat Oct 31 2026

Key Messages

  • Rain lifting by the end of the night with dry conditions remaining Sunday.
  • Rain returns Sunday night. Marginal Risk for severe weather Monday afternoon.
  • Rain remains likely through at least Wednesday.

Aviation

/06Z TAFS THROUGH 06Z MONDAY/... Issued at 1038 PM CDT Sat Oct 31 2026

A combination of LIFR to VFR observations exist across central Iowa. KMCW is socked in with LIFR fog with the other sites seeing transient low CIGS, lowered VSBY and patchy drizzle. This is to be expected throu...