10-Day Weather Forecast - Petersburg, IL

Mostly cloudy in the morning then becoming partly sunny. Highs in the lower 30s. North winds 5 to 10 mph.

Mostly clear in the evening then becoming partly cloudy. Cooler with lows around 10 above. North winds around 5 mph.

Mostly sunny. Highs in the upper 20s. North winds around 5 mph.

Mostly clear in the evening then becoming partly cloudy. Lows around 13. West winds around 5 mph.

Partly sunny. Not as cool with highs in the upper 30s.

Partly cloudy. Lows around 30. Highs in the lower 40s.

Partly cloudy. Lows around 30. Highs in the lower 40s.

Partly cloudy. Lows around 20. Highs in the mid 30s.

Partly cloudy. Lows around 20. Highs in the mid 30s.

Partly cloudy. Lows around 20. Highs in the mid 30s.

Partly cloudy. Lows around 20. Highs in the mid 30s.

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 20s.

Mostly sunny. Highs in the lower 40s.

Clear. Low temperature around 25F. Dew point will be around 18F with an average humidity of 67%. Winds will be 7 mph from the SE.

Mostly sunny. High temperature around 36F. Dew point will be around 22F with an average humidity of 63%. Winds will be 7 mph from the SE.

Partly cloudy with a slight chance of rain-snow mix. Chance of precipitation 30%. Low temperature around 31F. Dew point will be around 25F with an average humidity of 74%. Winds will be 7 mph from the SE.

Cloudy with a chance of rain-snow mix. Chance of precipitation 40%. High temperature around 41F. Dew point will be around 31F with an average humidity of 75%. Winds will be 9 mph from the SE.

Cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 38F. Dew point will be around 34F with an average humidity of 82%. Winds will be 7 mph from the S.