10-Day Weather Forecast - Saint Peters, PA

Mostly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Northwest winds 5 to 10 mph. Chance of rain 50 percent.

A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Humid with lows in the lower 60s. Northwest winds around 5 mph. Chance of rain 50 percent.

Mostly sunny. Highs in the upper 70s. North winds 5 to 10 mph.

Mostly clear. Lows in the upper 50s. North winds around 5 mph.

Sunny. Highs in the mid 70s.

Mostly clear. Lows in the mid 50s.

Sunny. Highs in the upper 70s.

Mostly clear. Lows in the mid 50s.

Mostly sunny. Highs in the upper 70s.

Partly cloudy. Lows in the upper 50s.

Mostly sunny. Highs in the lower 80s.

Partly cloudy. Lows in the mid 60s.

Mostly sunny. Highs in the mid 80s.

Partly cloudy with a 35% chance for rain and thunderstorms. Low temperature around 65F. Dew point will be around 65F with an average humidity of 90%. Winds will be 4 mph from the W.

Partly cloudy. High temperature around 77F. Dew point will be around 64F with an average humidity of 75%. Winds will be 5 mph from the NW.

Mostly clear. Low temperature around 60F. Dew point will be around 60F with an average humidity of 88%. Winds will be 2 mph from the NW.

Mostly sunny. High temperature around 75F. Dew point will be around 61F with an average humidity of 73%. Winds will be 2 mph from the N.

Clear. Low temperature around 59F. Dew point will be around 59F with an average humidity of 91%. Winds will be 2 mph from the S.