Saint Peter, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Peter, IL in one place.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Saint Peter, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 11, 2026 5:44 PM CDT.
The active forecast window currently covers Apr 15 to Apr 17, 2026 for Saint Peter, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 17, 2026
- Latest sync
- Apr 11, 2026 5:44 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Peter
Friday looks like the warmest upcoming period in Saint Peter at 83 degrees F.
Friday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Wednesday at about 13 to 16 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 11, 2026 5:44 PM CDT
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Showers and thunderstorms likely. Partly sunny, with a high near 79. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 50%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 40%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
80°F |
13 to 16 mph
SW
|
|
Wednesday Night
Apr 15
|
Showers And Thunderstorms Likely
|
63°F |
7 to 12 mph
SW
|
|
Thursday
Apr 16
|
Showers And Thunderstorms Likely
|
79°F |
7 to 10 mph
SW
|
|
Thursday Night
Apr 16
|
Chance Showers And Thunderstorms
|
60°F |
7 mph
SW
|
|
Friday
Apr 17
|
Chance Showers And Thunderstorms
|
83°F |
6 to 14 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms Likely
|
57°F |
12 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Peter.