10-Day Weather Forecast - Johnston, IA

Areas of frost in the morning. Sunny. Highs in the lower 60s. West winds 5 to 10 mph.

Mostly clear in the evening then becoming partly cloudy. Lows in the mid 40s. Southwest winds 5 to 10 mph.

Partly sunny. Highs in the mid 70s. Southwest winds around 10 mph becoming west in the afternoon.

Partly cloudy in the evening then clearing. Lows in the upper 40s.

Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent.

Partly cloudy with a 20 percent chance of showers. Lows in the mid 40s.

Partly sunny with a 30 percent chance of showers. Cooler with highs in the lower 60s.

Mostly cloudy with a slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the lower 40s. Chance of rain 20 percent.

Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 60. Chance of rain 20 percent.

Mostly cloudy in the evening then clearing. Lows in the upper 30s.

Sunny. Highs in the mid 60s.

Mostly clear. Low temperature around 45F. Dew point will be around 40F with an average humidity of 66%. Winds will be 4 mph from the SW.

Sunny. High temperature around 69F. Dew point will be around 44F with an average humidity of 56%. Winds will be 6 mph from the W.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 48F. Dew point will be around 44F with an average humidity of 66%. Winds will be 3 mph from the NW.

Mostly sunny. High temperature around 66F. Dew point will be around 46F with an average humidity of 62%. Winds will be 4 mph from the NW.

Partly cloudy. Low temperature around 48F. Dew point will be around 45F with an average humidity of 68%. Winds will be 3 mph from the NW.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 66F. Dew point will be around 47F with an average humidity of 65%. Winds will be 2 mph from the N.

Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 49F. Dew point will be around 47F with an average humidity of 72%. Winds will be 1 mph from the NW.