10-Day Weather Forecast - Johnston, IA

Mostly sunny. Highs in the upper 70s. South winds 10 to 15 mph.

Mostly cloudy. Lows in the mid 50s. South winds 5 to 10 mph.

Partly sunny. Highs in the mid 70s. South winds around 5 mph, becoming west in the afternoon.

Mostly cloudy. Lows in the lower 50s. Northeast winds around 5 mph.

Mostly cloudy. Highs in the upper 60s.

Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 50s. Chance of rain 40 percent.

Mostly cloudy. A slight chance of showers in the morning. Highs in the mid 60s. Chance of rain 20 percent.

Mostly cloudy. Lows in the lower 50s.

Partly sunny. A slight chance of showers in the morning. Highs in the upper 60s. Chance of rain 20 percent.

Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 40s. Chance of rain 20 percent.

Mostly sunny. A slight chance of showers in the morning. Highs in the mid 60s. Chance of rain 20 percent.

Partly cloudy in the evening, then becoming mostly cloudy. A 20 percent chance of showers. Lows in the mid 40s.

Partly sunny with a 40 percent chance of showers. Highs in the lower 60s.

Mostly cloudy. Low temperature around 62F. Dew point will be around 50F with an average humidity of 64%. Winds will be 11 mph from the S.

Cloudy. High temperature around 69F. Dew point will be around 52F with an average humidity of 59%. Winds will be 13 mph from the SSE.

Cloudy. Low temperature around 58F. Dew point will be around 51F with an average humidity of 82%. Winds will be 13 mph from the SSE.

Cloudy. High temperature around 67F. Dew point will be around 59F with an average humidity of 81%. Winds will be 17 mph from the SSW.

Mostly clear. Low temperature around 44F. Dew point will be around 35F with an average humidity of 72%. Winds will be 17 mph from the WNW.