10-Day Weather Forecast - Petersburg, IL

Mostly sunny. Highs in the upper 80s. East winds 5 to 10 mph.

Mostly clear. Lows in the lower 60s. East winds 5 to 10 mph.

Sunny. Highs in the upper 80s. East winds around 5 mph.

Mostly clear. Hot. Lows in the lower 60s.

Mostly clear. Hot. Highs in the mid 90s.

Mostly clear. Not as cool with lows in the mid 70s.

Mostly sunny. Hot with highs in the mid 90s.

Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 40 percent.

Mostly sunny. Highs in the upper 80s.

Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the upper 80s.

Partly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 61F. Dew point will be around 60F with an average humidity of 71%. Winds will be 5 mph from the SE.

Sunny. High temperature around 85F. Dew point will be around 57F with an average humidity of 54%. Winds will be 4 mph from the S.

Clear. Low temperature around 64F. Dew point will be around 57F with an average humidity of 61%. Winds will be 5 mph from the SE.

Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 88F. Dew point will be around 59F with an average humidity of 52%. Winds will be 6 mph from the S.

Clear. Low temperature around 67F. Dew point will be around 60F with an average humidity of 64%. Winds will be 5 mph from the S.

Sunny. High temperature around 90F. Dew point will be around 62F with an average humidity of 54%. Winds will be 7 mph from the S.

Clear. Low temperature around 68F. Dew point will be around 62F with an average humidity of 62%. Winds will be 5 mph from the S.