Weather in Saint Peter, IL
Updated 2026-09-26 11:00 local time · ZIP codes 62880
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
67°11% rain68°10% rain68°10% rain
71°7% rain72°10% rain68°11% rain67°11% rain67°12% rain
67°11% rain67°11% rain67°11% rain
67°9% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 12%).
It feels like 62°F with winds near 7 mph.
71°F, 7% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 9 mph.
Current temperature is 67°F, wind 7 mph, rain chance up to 12%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Local weather characteristics in Saint Peter
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Saint Peter is part of the Midwest weather region. The forecast point is near 38.87°N latitude and 88.85°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Saint Peter weather today
Overcast and 67°F in Saint Peter, IL. Today's high is 72°F with a 10% rain chance. Winds are around 7 mph with gusts near 8 mph. Relative humidity is 47%, pressure is 30.15 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Saint Peter
Sunrise is at 06:46 AM and sunset is at 06:46 PM. Tomorrow's forecast calls for Overcast with a high near 77°F and a low near 56°F. The maximum rain chance is 7%.