Local Forecast

Johnston, IA Weather Forecast & Alerts

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

Active Alerts 2 active

Hour-by-Hour  Current Observation

Sunday 7:05 PM CDTSunday 7:05 PM

°F °C
Regional Observations →
87°F

Partly Cloudy

  • 95° / 77° High / Low
  • 97° Feels Like
  • 0% Chance of Rain

Wind

15 mph

S

UV Index

3

Moderate

Humidity

66%

Dew 75°F

Sun

5:42 AM · 8:53 PM

Rise · Set

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

5-Day Outlook

Through Thursday

Local Radar →

Today

95° 77°

Mostly Cloudy

Overnight: Partly Cloudy

Detailed forecast

Today

Mostly sunny, with a high near 94. Heat index values as high as 105. South southeast wind around 18 mph, with gusts as high as 30 mph.

Night

Partly cloudy, with a low around 77. Heat index values as high as 107. South wind 12 to 18 mph, with gusts as high as 30 mph.

Monday

96° 78°

Mostly Sunny

Overnight: Partly Cloudy

Detailed forecast

Monday

Sunny, with a high near 96. Heat index values as high as 109. South wind 12 to 21 mph, with gusts as high as 35 mph.

Night

Partly cloudy, with a low around 78. Heat index values as high as 107. South wind 12 to 21 mph, with gusts as high as 35 mph.

Tuesday

96° 75°

Mostly Sunny

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Tuesday

Sunny, with a high near 96. South southwest wind 12 to 17 mph, with gusts as high as 28 mph.

Night

A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 75. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Wednesday

95° 75°

Partly Sunny

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Wednesday

A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 95. Chance of precipitation is 30%.

Night

A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74. Chance of precipitation is 30%.

Thursday

95° 75°

Partly Sunny

Overnight: Isolated T-storm

Detailed forecast

Thursday

A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 94.

Night

A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74.

Johnston, IA Weather Analysis Tools