10-Day Weather Forecast - Johnston, IA

Sunny with highs in the upper 80s. South winds around 5 mph.

Mostly clear. Humid with lows in the mid 60s. South winds around 5 mph.

Sunny with highs around 90. South winds 5 to 10 mph.

Partly cloudy with a chance of showers and thunderstorms in the evening then mostly cloudy with showers and thunderstorms likely after midnight. Lows around 70. Chance of rain 70 percent.

Mostly cloudy in the morning then becoming partly sunny. A chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.

Mostly cloudy with a chance of showers. A chance of thunderstorms mainly in the evening. Lows in the upper 60s. Chance of rain 50 percent.

Partly sunny. A slight chance of showers and thunderstorms in the morning then a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent.

Mostly cloudy. Lows in the mid 60s.

Partly sunny. Highs in the upper 80s.

Partly cloudy in the evening then becoming mostly clear. Lows in the upper 60s.

Sunny. Highs around 90.

Clear. Low temperature around 72F. Dew point will be around 69F with an average humidity of 74%. Winds will be 4 mph from the S.

Sunny. High temperature around 89F. Dew point will be around 71F with an average humidity of 67%. Winds will be 3 mph from the NW.

Clear. Low temperature around 70F. Dew point will be around 69F with an average humidity of 77%. Winds will be 2 mph from the SE.

Sunny. High temperature around 87F. Dew point will be around 69F with an average humidity of 70%. Winds will be 1 mph from the E.

Clear. Low temperature around 69F. Dew point will be around 68F with an average humidity of 77%. Winds will be 1 mph from the SE.

Sunny. High temperature around 86F. Dew point will be around 68F with an average humidity of 68%. Winds will be 1 mph from the E.

Mostly clear with widely scattered thunderstorms. Chance of storms 25%. Low temperature around 69F. Dew point will be around 67F with an average humidity of 75%. Winds will be 2 mph from the E.