10-Day Weather Forecast - Ottawa, IL

Mostly sunny. Patchy fog early in the morning. Humid. Highs around 90. North winds 5 to 10 mph. Heat index values up to 100.

Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.

Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s. East winds 5 to 10 mph.

Partly cloudy. Lows in the lower 60s. East winds around 5 mph.

Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s. Southeast winds 5 to 10 mph.

Partly cloudy. Lows in the lower 60s.

Partly cloudy. Highs in the upper 80s.

Partly cloudy. Lows in the mid 70s.

Partly cloudy. Highs in the upper 80s.

Partly cloudy. Lows in the mid 60s.

Partly cloudy. Highs in the lower 80s.

Partly cloudy. Lows in the lower 60s.

Partly cloudy in the morning, then becoming mostly sunny. Highs in the mid 80s.

Clear. Low temperature around 61F. Dew point will be around 59F with an average humidity of 76%. Winds will be 2 mph from the SE.

Sunny. High temperature around 78F. Dew point will be around 58F with an average humidity of 63%. Winds will be 2 mph from the S.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 63F. Dew point will be around 60F with an average humidity of 74%. Winds will be 4 mph from the S.

Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 82F. Dew point will be around 61F with an average humidity of 63%. Winds will be 5 mph from the SW.

Clear. Low temperature around 67F. Dew point will be around 62F with an average humidity of 71%. Winds will be 4 mph from the S.