10-Day Weather Forecast - Johnston, IA

Mostly cloudy in the morning then clearing. Much cooler with highs around 40. Northeast winds 10 to 15 mph.

Partly cloudy. Lows around 19. Northeast winds 5 to 10 mph.

Cloudy. A chance of snow in the afternoon. Light snow accumulation possible. Highs in the lower 30s. Northeast winds around 10 mph. Chance of snow 40 percent.

Mostly cloudy. A chance of snow mainly in the evening. Little or no additional snow accumulation. Lows in the lower 20s. East winds 5 to 10 mph. Chance of snow 40 percent.

Mostly cloudy with a slight chance of snow. A slight chance of rain in the afternoon. Highs in the lower 40s. Chance of precipitation 20 percent.

Cloudy with a 50 percent chance of rain. Lows in the lower 30s.

Mostly cloudy with a 50 percent chance of rain. Highs in the mid 40s.

Partly cloudy with a 30 percent chance of rain. Lows in the lower 30s.

Partly sunny in the morning then becoming mostly cloudy. A 50 percent chance of rain. Highs in the upper 40s.

Mostly cloudy. A chance of rain in the evening then rain likely after midnight. Lows in the upper 30s. Chance of rain 60 percent.

Mostly cloudy in the morning then becoming partly sunny. A 40 percent chance of rain. Highs in the mid 50s.

Partly cloudy in the evening then becoming mostly cloudy. A 40 percent chance of rain. Lows in the upper 30s.

Mostly cloudy with a 50 percent chance of rain. Highs in the lower 50s.

Partly cloudy with a chance of rain. Chance of precipitation 50%. Low temperature around 38F. Dew point will be around 36F with an average humidity of 76%. Winds will be 3 mph from the W.

Partly cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 53F. Dew point will be around 35F with an average humidity of 61%. Winds will be 3 mph from the W.

Partly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 41F. Dew point will be around 36F with an average humidity of 73%. Winds will be 4 mph from the S.

Partly cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 57F. Dew point will be around 41F with an average humidity of 66%. Winds will be 7 mph from the S.

Mostly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 47F. Dew point will be around 42F with an average humidity of 76%. Winds will be 7 mph from the S.