Local Forecast

Johnston, IA Weather Forecast & Alerts

Current conditions, 5-day forecast, active weather alerts for Johnston, IA

Active Alerts 1 active

Hour-by-Hour  Current Observation

Wednesday 4:35 PM CDTWednesday 4:35 PM

°F °C
Regional Observations →
84°F

Mostly Clear

  • 95° / 77° High / Low
  • 94° Feels Like
  • 0% Chance of Rain

Wind

6 mph

ESE

UV Index

6

High

Humidity

79%

Dew 77°F

Sun

6:43 AM · 7:44 PM

Rise · Set

Source: AMES (KAMW). Slider scrubs the next 12 hours.

5-Day Outlook

Through Sunday

Local Radar →

This Afternoon

95° 77°

Isolated T-storm

Overnight: Mostly Cloudy

Detailed forecast

This Afternoon

A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Sunny, with a high near 95. Heat index values as high as 103. South southwest wind around 9 mph. Chance of precipitation is 20%.

Night

Partly cloudy. Low around 76, with temperatures rising to around 78 overnight. Heat index values as high as 100. South wind 5 to 8 mph.

Thursday

95° 75°

Mostly Cloudy

Overnight: Mostly Clear

Detailed forecast

Thursday

Mostly sunny, with a high near 95. Heat index values as high as 103. South southeast wind 6 to 10 mph.

Night

Mostly clear. Low around 75, with temperatures rising to around 78 overnight. Heat index values as high as 100. South wind 6 to 9 mph.

Friday

95° 73°

Mostly Sunny

Overnight: Mostly Clear

Detailed forecast

Friday

Sunny, with a high near 95. South southwest wind 5 to 8 mph.

Night

Mostly clear, with a low around 73.

Saturday

91° 71°

Partly Sunny

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Saturday

A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 20%.

Night

Mostly clear, with a low around 71.

Sunday

89° 71°

Partly Sunny

Overnight: Isolated T-storm

Detailed forecast

Sunday

A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70.

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