Weather in Johnston, Iowa, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Johnston
Overnight |
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Temperature: 69°F Wind Speed: 10 mph Wind Direction: S Forecast: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. South wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible. |
Friday |
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Temperature: 94°F Wind Speed: 12 to 20 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 10am. Sunny, with a high near 94. Heat index values as high as 103. South wind 12 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible. |
Friday Night |
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Temperature: 78°F Wind Speed: 20 mph Wind Direction: SSW Forecast: Mostly clear, with a low around 78. Heat index values as high as 101. South southwest wind around 20 mph, with gusts as high as 32 mph. |
Saturday |
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Temperature: 96°F Wind Speed: 18 to 23 mph Wind Direction: SSW Forecast: Sunny, with a high near 96. Heat index values as high as 104. South southwest wind 18 to 23 mph, with gusts as high as 35 mph. |
Saturday Night |
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Temperature: 78°F Wind Speed: 16 to 21 mph Wind Direction: SSW Forecast: Clear, with a low around 78. South southwest wind 16 to 21 mph, with gusts as high as 31 mph. |
Sunday |
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Temperature: 95°F Wind Speed: 16 to 23 mph Wind Direction: SSW Forecast: Sunny, with a high near 95. |
Sunday Night |
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Temperature: 76°F Wind Speed: 12 to 21 mph Wind Direction: SSW Forecast: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. Chance of precipitation is 20%. |
Monday |
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Temperature: 94°F Wind Speed: 13 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 40%. |
Monday Night |
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Temperature: 70°F Wind Speed: 6 to 12 mph Wind Direction: SSW Forecast: A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 70%. |
Tuesday |
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Temperature: 89°F Wind Speed: 8 mph Wind Direction: SSE Forecast: Showers and thunderstorms likely before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 70%. |
Tuesday Night |
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Temperature: 70°F Wind Speed: 7 mph Wind Direction: SE Forecast: Showers and thunderstorms likely before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. |
Wednesday |
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Temperature: 90°F Wind Speed: 6 to 10 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 90. Chance of precipitation is 60%. |
Wednesday Night |
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Temperature: 70°F Wind Speed: 8 mph Wind Direction: SSW Forecast: Showers and thunderstorms likely before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. |
Thursday |
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Temperature: 84°F Wind Speed: 6 to 10 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 84. |