Local Forecast

Johnston, IA Weather Forecast & Alerts

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

No Active Alerts

Hour-by-Hour  Current Observation

Sunday 1:00 AM CDTSunday 1:00 AM

°F °C
Regional Observations →
66°F

Clear

  • 86° / 66° High / Low
  • 66° Feels Like
  • 0% Chance of Rain

Wind

SE

8 mph

UV Index

0

None

Humidity

78%

Dew 59°F

Sun

5:53 AM · 8:28 PM

Rise · Set

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

5-Day Outlook

Through Thursday

Local Radar →

Today

86° 66°

Thunderstorms Likely

Overnight: Thunderstorms

Detailed forecast

Today

Showers and thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 9am. Mostly cloudy, with a high near 85. South southeast wind 9 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Night

A chance of showers and thunderstorms between 10pm and 1am, then showers and thunderstorms. Mostly cloudy. Low around 65, with temperatures rising to around 68 overnight. South wind 13 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Monday

84° 57°

Thunderstorms

Overnight: Thunderstorms

Detailed forecast

Monday

Showers and thunderstorms. Partly sunny, with a high near 84. South wind 12 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Night

Showers and thunderstorms. Mostly cloudy, with a low around 57. South southwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Tuesday

68° 46°

Mostly Cloudy

Overnight: Partly Cloudy

Detailed forecast

Tuesday

Rain showers before 7am. Partly sunny, with a high near 67. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Night

Mostly cloudy, with a low around 46.

Wednesday

64° 46°

Mostly Cloudy

Overnight: Partly Cloudy

Detailed forecast

Wednesday

Mostly sunny, with a high near 64.

Night

Mostly cloudy, with a low around 45.

Thursday

66° 48°

Mostly Cloudy

Overnight: Mostly Cloudy

Detailed forecast

Thursday

Mostly sunny, with a high near 66.

Night

Mostly cloudy, with a low around 47.

Johnston, IA Weather Analysis Tools