10-Day Weather Forecast - Petersburg, IL

Partly sunny. Not as cool with highs in the upper 40s. Temperature falling to around 40 in the afternoon. South winds around 15 mph becoming northwest in the afternoon. Gusts up to 30 mph.

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

Sunny cooler with highs in the mid 30s. North winds around 5 mph.

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 mid 50s.

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

Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s.

Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s.

Mostly cloudy. Lows in the lower 50s. Highs in the mid 60s.

Mostly cloudy. Lows in the lower 50s. Highs in the mid 60s.

Mostly clear. Low temperature around 45F. Dew point will be around 46F with an average humidity of 80%. Winds will be 8 mph from the SW.

Partly cloudy. High temperature around 54F. Dew point will be around 41F with an average humidity of 73%. Winds will be 2 mph from the S.

Partly cloudy. Low temperature around 44F. Dew point will be around 42F with an average humidity of 84%. Winds will be 3 mph from the S.

Mostly cloudy. High temperature around 51F. Dew point will be around 41F with an average humidity of 75%. Winds will be 1 mph from the W.

Mostly cloudy. Low temperature around 39F. Dew point will be around 37F with an average humidity of 78%. Winds will be 3 mph from the NW.

Partly cloudy. High temperature around 44F. Dew point will be around 33F with an average humidity of 71%. Winds will be 4 mph from the NW.

Mostly clear. Low temperature around 30F. Dew point will be around 27F with an average humidity of 74%. Winds will be 5 mph from the NW.