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Johnston, IA
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7-Day Forecast
Today
Sunny
High: 34°
Sunny with a high near 34. Wind chill values as low as 5. Southwest wind 6 to 9 mph.
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Tonight
Partly Cloudy
Low: 20°
Partly cloudy with a low around 20. South southwest wind 3 to 6 mph.
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Sunday
Becoming Sunny
High: 45°
Partly sunny, then gradually becoming sunny with a high near 45. Southwest wind 3 to 7 mph.
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Sunday Night
Partly Cloudy
Low: 31°
Partly cloudy with a low around 31. Southwest wind 6 to 8 mph.
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Monday
Mostly Sunny
High: 53°
Mostly sunny with a high near 53. West wind 6 to 9 mph.
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Monday Night
Partly Cloudy
Low: 32°
Partly cloudy with a low around 32.
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Tuesday
Mostly Sunny
High: 54°
Mostly sunny with a high near 54.
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Tuesday Night
Mostly Cloudy then Chance Rain
Low: 36°
A 30% chance of rain after midnight. Mostly cloudy with a low around 36.
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Wednesday
Mostly Sunny
High: 52°
Mostly sunny with a high near 52.
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Wednesday Night
Partly Cloudy
Low: 31°
Partly cloudy with a low around 31.
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Thursday
Mostly Sunny
High: 51°
Mostly sunny with a high near 51.
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Thursday Night
Partly Cloudy
Low: 29°
Partly cloudy with a low around 29.
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Friday
Mostly Sunny
High: 53°
Mostly sunny with a high near 53.
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Source: National Weather Service
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