10-Day Weather Forecast - Petersburg, IL

Mostly sunny. Much cooler with highs in the lower 30s. Northwest winds 15 to 20 mph with gusts up to 35 mph becoming southwest 5 to 10 mph in the afternoon. Wind chill values as low as 2 below in the morning.

Mostly clear in the evening then becoming mostly cloudy. Not as cool with lows in the mid 20s. Temperature rising into the lower 30s after midnight. South winds 10 to 15 mph with gusts up to 30 mph.

Partly sunny. Not as cool with highs in the upper 40s. South winds 10 to 15 mph becoming west in the afternoon.

Partly cloudy in the evening then becoming mostly clear. Lows in the lower 20s. Northwest winds 5 to 10 mph.

Sunny cooler with highs in the mid 30s.

Mostly cloudy. Lows in the mid 20s. Highs in the lower 40s.

Mostly cloudy. Lows in the mid 20s. Highs in the lower 40s.

Mostly cloudy. Lows in the upper 30s. Highs in the mid 50s.

Mostly cloudy. Lows in the upper 30s. Highs in the mid 50s.

Mostly cloudy. Lows in the upper 30s. Highs in the mid 50s.

Mostly cloudy. Highs in the lower 60s. Lows in the upper 40s.

Mostly cloudy. Highs in the lower 60s. Lows in the upper 40s.

Mostly cloudy. Highs in the lower 60s. Lows in the upper 40s.

Partly cloudy. Low temperature around 47F. Dew point will be around 49F with an average humidity of 84%. Winds will be 7 mph from the W.

Mostly sunny. High temperature around 55F. Dew point will be around 46F with an average humidity of 78%. Winds will be 4 mph from the SW.

Partly cloudy. Low temperature around 44F. Dew point will be around 43F with an average humidity of 82%. Winds will be 2 mph from the S.

Mostly cloudy. High temperature around 52F. Dew point will be around 44F with an average humidity of 80%. Winds will be 1 mph from the S.

Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 42F. Dew point will be around 40F with an average humidity of 82%. Winds will be 2 mph from the NE.