I-80 weather conditions near Johnston, Iowa
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 63°F 2025-06-19T05:15:00-05:00 
Juneteenth 2025-06-19, Sunny. Sunny, with a high near 87. West wind 3 to 7 mph.Tonight 2025-06-19, Mostly Clear then Chance T-storms. A slight chance of showers between 2am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 69. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday 2025-06-20, Chance T-storms and Breezy. A 30 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 94. Heat index values as high as 105. Breezy, with a south wind 13 to 20 mph, with gusts as high as 31 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night 2025-06-20, Clear and Breezy. Clear, with a low around 78. Breezy, with a south wind around 18 mph, with gusts as high as 30 mph.
Saturday 2025-06-21, Hot and Windy. Sunny and hot, with a high near 97. Windy, with a south southwest wind 18 to 22 mph, with gusts as high as 34 mph.- Saturday Night 2025-06-21, Clear and Breezy. Clear, with a low around 78. Breezy.
- Sunday 2025-06-22, Hot and Windy. Sunny and hot, with a high near 97. Windy.
Sunday Night 2025-06-22, Mostly Clear and Breezy then Chance Showers. A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. Breezy.
Monday 2025-06-23, Sunny then Chance T-storms. A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93.
Monday Night 2025-06-23, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.
Tuesday 2025-06-24, Showers Likely. Showers likely and possibly a thunderstorm. Partly sunny, with a high near 89. Chance of precipitation is 60%.- Tuesday Night 2025-06-24, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
- Wednesday 2025-06-25, Showers Likely. Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 60%.