10-Day Weather Forecast - Petersburg, IL

Cloudy with showers in the morning then partly sunny with a chance of showers in the afternoon. Breezy with highs in the lower 50s. Temperature falling to around 40 in the afternoon. Southwest winds 15 to 25 mph becoming west 15 to 20 mph in the afternoon. Gusts up to 40 mph. Chance of rain 90 percent.

Mostly cloudy and blustery. Much cooler with lows around 18. West winds 15 to 25 mph with gusts up to 40 mph.

Sunny. Much cooler with highs in the mid 30s. West winds 10 to 15 mph becoming southwest 5 to 10 mph in the afternoon.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 20s. Temperature rising into the mid 30s after midnight. South winds 10 to 15 mph with gusts up to 30 mph.

Mostly cloudy in the morning then becoming partly sunny. Not as cool with highs in the upper 40s.

Partly cloudy in the evening then clearing. Lows in the lower 20s.

Sunny cooler with highs in the upper 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 mid 30s. Highs in the lower 50s.

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

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

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

Cloudy. Low temperature around 49F. Dew point will be around 49F with an average humidity of 90%. Winds will be 8 mph from the S.

Cloudy. High temperature around 58F. Dew point will be around 51F with an average humidity of 85%. Winds will be 8 mph from the SW.

Cloudy. Low temperature around 52F. Dew point will be around 51F with an average humidity of 88%. Winds will be 7 mph from the SW.

Cloudy. High temperature around 59F. Dew point will be around 49F with an average humidity of 77%. Winds will be 7 mph from the SW.

Cloudy. Low temperature around 41F. Dew point will be around 40F with an average humidity of 76%. Winds will be 3 mph from the NW.