10-Day Weather Forecast - Johnston, IA

Mostly cloudy. A slight chance of snow in the morning then a chance of flurries in the afternoon. Patchy blowing snow in the afternoon. Breezy and not as cool with highs in the upper 20s. Southwest winds 10 to 15 mph with gusts up to 30 mph becoming northwest 15 to 25 mph with gusts up to 40 mph in the afternoon. Chance of snow 20 percent.

Mostly cloudy in the evening then clearing. Patchy blowing snow. Breezy with lows around 2 above. Northwest winds 15 to 25 mph. Gusts up to 45 mph in the evening. Wind chill values as low as 19 below.

Mostly sunny. Highs around 15. Northwest winds 15 to 20 mph. Wind chill values as low as 19 below.

Mostly cloudy in the evening then becoming partly cloudy. Lows around 7 above. Southwest winds 5 to 10 mph.

Mostly sunny. Not as cool with highs in the lower 30s.

Mostly cloudy. Lows around 20.

Partly sunny. Highs around 30.

Partly cloudy. Lows 10 to 15.

Mostly sunny. Highs in the lower 30s.

Mostly cloudy. Lows 15 to 20.

Partly sunny. Highs in the mid 20s.

Mostly cloudy. Lows zero to 5 above zero.

Mostly cloudy. A slight chance of snow in the morning then a chance of snow in the afternoon. Highs around 10 above. Chance of snow 30 percent.

Mostly clear with a slight chance of snow. Chance of precipitation 25%. Low temperature around -4F. Dew point will be around -8F with an average humidity of 73%. Winds will be 9 mph from the N.

Sunny. High temperature around 5F. Dew point will be around -7F with an average humidity of 66%. Winds will be 6 mph from the N.

Mostly clear. Low temperature around 0F. Dew point will be around -6F with an average humidity of 71%. Winds will be 1 mph from the NW.

Mostly sunny. High temperature around 12F. Dew point will be around 0F with an average humidity of 69%. Winds will be 2 mph from the SE.

Cloudy. Low temperature around 8F. Dew point will be around 6F with an average humidity of 84%. Winds will be 2 mph from the S.