Saint Peter, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Peter, IL in one place.
Mostly cloudy, with a low around 59. East wind around 9 mph.
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: May 31, 2026 3:19 AM CDT.
The active forecast window currently covers May 31 to Jun 6, 2026 for Saint Peter, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 6, 2026
- Latest sync
- May 31, 2026 3:19 AM 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 84 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Friday at about 7 to 12 mph S.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- May 31, 2026 3:19 AM CDT
- Coverage
- 7 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
Partly sunny, with a high near 79. East wind 3 to 8 mph.
A chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 61. East wind 1 to 5 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 80. East wind around 3 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 59. Northeast wind around 5 mph. Chance of precipitation is 30%.
Sunny, with a high near 79.
Clear, with a low around 55.
Sunny, with a high near 78.
Mostly clear, with a low around 56.
Sunny, with a high near 81.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 84.
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
May 31
|
Mostly Cloudy
|
59°F |
9 mph
E
|
|
Sunday
May 31
|
Partly Sunny
|
79°F |
3 to 8 mph
E
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms
|
61°F |
1 to 5 mph
E
|
|
Monday
Jun 1
|
Chance Showers And Thunderstorms
|
80°F |
3 mph
E
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms then Mostly Clear
|
59°F |
5 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
79°F |
5 to 9 mph
NE
|
|
Tuesday Night
Jun 2
|
Clear
|
55°F |
2 to 7 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
78°F |
5 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
56°F |
3 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
81°F |
6 mph
S
|
|
Thursday Night
Jun 4
|
Partly Cloudy
|
63°F |
6 mph
S
|
|
Friday
Jun 5
|
Mostly Sunny
|
84°F |
7 to 12 mph
S
|
|
Friday Night
Jun 5
|
Chance Showers And Thunderstorms
|
67°F |
9 mph
S
|
|
Saturday
Jun 6
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
84°F |
7 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Peter.