10-Day Weather Forecast - Johnston, IA

Sunny. Highs in the mid 30s. West winds 5 to 10 mph becoming south 10 to 15 mph in the afternoon.

Partly cloudy in the evening then becoming mostly cloudy. Not as cool with lows in the upper 20s. South winds 10 to 15 mph with gusts up to 25 mph.

Mostly sunny. Highs in the upper 30s. Northwest winds 10 to 15 mph.

Mostly clear. Lows around 19. Northwest winds 5 to 10 mph.

Sunny. Highs in the upper 30s.

Mostly cloudy. Near steady temperature in the lower 30s.

Mostly sunny. Highs in the upper 40s.

Partly cloudy. Lows in the mid 30s.

Mostly sunny. Highs around 50.

Mostly cloudy. Lows in the lower 30s.

Mostly cloudy in the morning then becoming partly sunny. Highs around 50.

Mostly cloudy. Lows in the upper 30s.

Partly sunny. Highs around 50.

Mostly clear. Low temperature around 39F. Dew point will be around 39F with an average humidity of 82%. Winds will be 3 mph from the NW.

Mostly sunny. High temperature around 49F. Dew point will be around 38F with an average humidity of 76%. Winds will be 2 mph from the S.

Partly cloudy. Low temperature around 37F. Dew point will be around 35F with an average humidity of 82%. Winds will be 1 mph from the N.

Mostly cloudy. High temperature around 45F. Dew point will be around 35F with an average humidity of 76%. Winds will be 3 mph from the NE.

Partly cloudy. Low temperature around 34F. Dew point will be around 32F with an average humidity of 81%. Winds will be 4 mph from the N.