10-Day Weather Forecast - Cortland, IL

Partly cloudy in the morning, then clearing. A slight chance of showers and thunderstorms early in the morning. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of precipitation 20 percent. Heat index values up to 101.

Mostly clear. A slight chance of showers in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Humid with lows in the upper 60s. Southwest winds around 5 mph, becoming east after midnight. Chance of precipitation 50 percent.

Partly cloudy. Humid with highs in the mid 80s. Northeast winds 5 to 10 mph.

Partly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.

Partly cloudy. Highs in the lower 80s.

Partly cloudy. Lows in the lower 60s.

Partly cloudy. Highs in the lower 80s.

Partly cloudy. Lows in the lower 60s.

Partly cloudy. Highs in the mid 80s.

Partly cloudy. A chance of showers after midnight. Lows around 70. Chance of precipitation 40 percent.

Partly cloudy. Highs in the upper 80s.

Partly cloudy with a 40 percent chance of showers. Lows in the upper 60s.

Partly cloudy. Highs in the lower 80s.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 66F. Dew point will be around 65F with an average humidity of 85%. Winds will be 1 mph from the N.

Mostly sunny. High temperature around 80F. Dew point will be around 65F with an average humidity of 72%. Winds will be 2 mph from the E.

Mostly clear. Low temperature around 65F. Dew point will be around 64F with an average humidity of 86%. Winds will be 3 mph from the SE.

Sunny. High temperature around 81F. Dew point will be around 66F with an average humidity of 72%. Winds will be 5 mph from the S.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 65F. Dew point will be around 66F with an average humidity of 87%. Winds will be 4 mph from the S.