10-Day Weather Forecast - Petersburg, IL

Partly sunny in the morning then becoming mostly cloudy. Highs in the mid 50s. West winds 10 to 15 mph with gusts up to 30 mph.

Mostly cloudy. Lows in the mid 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph.

Mostly cloudy in the morning then becoming partly sunny. Breezy and much cooler with highs in the mid 30s. Temperature falling into the upper 20s in the afternoon. Northwest winds 15 to 25 mph with gusts up to 35 mph.

Partly cloudy in the evening then becoming mostly clear. Much cooler with lows around 15. Northwest winds 10 to 15 mph with gusts up to 30 mph.

Mostly sunny. Highs in the upper 20s.

Mostly cloudy with a 50 percent chance of snow. Lows in the lower 20s. Temperature rising into the upper 20s after midnight.

Mostly cloudy. A chance of snow in the afternoon. Highs in the upper 30s. Chance of snow 40 percent.

Mostly cloudy. A chance of snow in the evening. Lows around 15. Chance of snow 30 percent.

Mostly cloudy. Highs in the lower 20s. Lows around 5 above. Wind chill values as low as 10 below.

Mostly cloudy. Highs in the lower 20s. Lows around 5 above. Wind chill values as low as 10 below.

Mostly cloudy. Highs in the lower 20s. Lows around 5 above. Wind chill values as low as 10 below.

Partly cloudy. Lows around 10 above. Highs in the upper 20s. Wind chill values as low as zero.

Partly cloudy. Lows around 10 above. Highs in the upper 20s. Wind chill values as low as zero.

Clear. Low temperature around 17F. Dew point will be around 12F with an average humidity of 70%. Winds will be 4 mph from the W.

Sunny. High temperature around 29F. Dew point will be around 13F with an average humidity of 60%. Winds will be 3 mph from the SW.

Mostly clear. Low temperature around 22F. Dew point will be around 18F with an average humidity of 74%. Winds will be 5 mph from the S.

Mostly sunny. High temperature around 36F. Dew point will be around 22F with an average humidity of 68%. Winds will be 6 mph from the S.

Mostly clear. Low temperature around 28F. Dew point will be around 26F with an average humidity of 82%. Winds will be 4 mph from the SE.