Saint Peters, PA Weather Tomorrow

Whether you're planning work or travel, tomorrow's Saint Peters weather and 5 day forecast offer precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Saint Peters area and around Chester county, Pennsylvania.
Updated: Mon Nov 2nd 2026 8:30 PM EST
Saint Peters, PA Weather – 11-2 – Overcast
64° / 41°
Overcast
Overcast is in the forecast for Saint Peters, with a high of 64°F and a low of 41°F. There's a very small chance of rainfall, only about 10%. Winds will be light at 8mph and gusts of 12.3mph at 11 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 78% at 11 PM and 70% being its lowest at 10 PM. Barometric pressure is its highest of 30.35inHg at 9 PM, a lowest point of 30.34inHg at 11 PM with an avg 30.35inHg.
Saint Peters, PA Weather – 11-3 – Sunny
68° / 44°

Weather Tomorrow

Sunny
In Saint Peters, it will be sunny with highs near 68°F and lows around 44°F. There might be light rainfall having a 12% chance. Winds will be light at 8mph and gusts of 13.8mph at 1 PM. The humidity will be on the higher side, averaging about 75%, the maximum being 92% at 10 PM and 53% being its lowest at 2 PM. Barometric pressure is its highest of 30.34inHg at 12 AM, a lowest point of 30.21inHg at 5 PM with an avg 30.28inHg.
Saint Peters, PA Weather – 11-4 – Sunny
71° / 49°
Sunny
In Saint Peters, it will be sunny with highs near 71°F and lows around 49°F. There might be light rainfall having a 12% chance. Winds will be light at 10mph and gusts of 17mph at 1 PM. High humidity with average of 84% is anticipated, the maximum being 97% at 11 PM and 56% being its lowest at 2 PM. Barometric pressure is its highest of 30.22inHg at 1 AM, a lowest point of 30inHg at 11 PM with an avg 30.12inHg.
Saint Peters, PA Weather – 11-5 – Mist
70° / 55°
Mist
Saint Peters may see mist, with daytime highs of 70°F and overnight lows near 55°F. The chance of rain is 87% with an estimated 0.15in. Winds will be light at 9mph and gusts of 25.3mph at 9 AM. High humidity with average of 93% is anticipated, the maximum being 98% at 7 AM and 81% being its lowest at 3 PM. Barometric pressure is its highest of 30inHg at 1 AM, a lowest point of 29.84inHg at 10 PM with an avg 29.91inHg.
Saint Peters, PA Weather – 11-6 – Overcast
70° / 53°
Overcast
Saint Peters could see cloud-filled skies with daytime highs of 70°F and nighttime lows near 53°F. Rainfall predicted to have a 51% chance with an estimated 0.02in. Winds will be light at 8mph and gusts of 19.9mph at 11 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 96% at 4 AM and 47% being its lowest at 2 PM. Barometric pressure is its highest of 29.86inHg at 9 AM, a lowest point of 29.76inHg at 5 PM with an avg 29.82inHg.
Saint Peters, PA Weather – 11-7 – Sunny
61° / 47°
Sunny
It will be sunny in Saint Peters, with a high of 61°F and a low of 47°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 22.4mph at 4 AM. The humidity will be on the higher side, averaging about 68%, the maximum being 83% at 4 AM and 49% being its lowest at 1 PM. Barometric pressure is its highest of 29.92inHg at 10 PM, a lowest point of 29.8inHg at 4 AM with an avg 29.85inHg.

Are You Here in Saint Peters?

Post your own weather forecast or report for Saint Peters, PA with a photo or video of what you see or read and confirm what others have shared on Signals by LocalConditions.com