10-Day Weather Forecast - Johnstown, WI

Hot and humid. Mostly sunny. Highs in the lower 90s. Southwest winds 10 to 20 mph. Highest heat index readings 102 to 107 in the late morning and afternoon.

Mostly clear. A 20 percent chance of light showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds 10 to 15 mph. Highest heat index readings 98 to 103 in the evening.

Hot and humid. Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph. Highest heat index readings 100 to 105 in the late morning and afternoon.

Mostly clear. A 20 percent chance of light showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds 10 to 15 mph. Highest heat index readings 95 to 100 in the evening.

Mostly sunny with a 40 percent chance of light showers and thunderstorms. Highs in the lower 90s.

Partly cloudy. Chance of light showers and thunderstorms through around midnight then light showers likely and chance of thunderstorms after midnight. Lows in the lower 70s. Chance of precipitation 60 percent.

Partly sunny. Chance of light showers and thunderstorms in the morning then light showers likely and chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of precipitation 60 percent.

Partly cloudy with a 40 percent chance of light showers and thunderstorms. Lows around 70.

Partly sunny with chance of light showers and slight chance of thunderstorms. Highs in the upper 80s. Chance of precipitation 50 percent.

Partly cloudy. Chance of showers and thunderstorms through around midnight then chance of light showers after midnight. Lows in the upper 60s. Chance of precipitation 50 percent.

Partly sunny with a 50 percent chance of showers and thunderstorms. Highs in the mid 80s.

Partly cloudy. Chance of light showers and thunderstorms through around midnight then slight chance of light showers after midnight. Lows in the mid 60s. Chance of precipitation 50 percent.

Mostly sunny. Slight chance of light showers in the morning then slight chance of light showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 20 percent.

Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 66F. Dew point will be around 64F with an average humidity of 75%. Winds will be 2 mph from the NE.

Sunny with a chance of rain. Chance of precipitation 40%. High temperature around 83F. Dew point will be around 66F with an average humidity of 73%. Winds will be 2 mph from the N.

Clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 66F. Dew point will be around 64F with an average humidity of 74%. Winds will be 1 mph from the NE.

Sunny with a chance of rain. Chance of precipitation 45%. High temperature around 83F. Dew point will be around 67F with an average humidity of 73%. Winds will be 1 mph from the W.

Mostly clear with a chance of rain. Chance of precipitation 40%. Low temperature around 67F. Dew point will be around 66F with an average humidity of 76%. Winds will be 1 mph from the SW.