Petersburg, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Petersburg, IL in one place.
Sunny, with a high near 80. East wind around 7 mph.
Local Weather Overview
This forecast page for Petersburg, 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: Jun 1, 2026 4:56 PM CDT.
The active forecast window currently covers Jun 3 to Jun 7, 2026 for Petersburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 3 to Jun 7, 2026
- Latest sync
- Jun 1, 2026 4:56 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Petersburg
Saturday looks like the warmest upcoming period in Petersburg at 86 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Thursday at about 2 to 12 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 1, 2026 4:56 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 60.
Sunny, with a high near 84.
Mostly clear, with a low around 64.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jun 3
|
Sunny
|
80°F |
7 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
60°F |
2 to 7 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
84°F |
2 to 12 mph
S
|
|
Thursday Night
Jun 4
|
Mostly Clear
|
64°F |
6 to 12 mph
S
|
|
Friday
Jun 5
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
7 to 12 mph
S
|
|
Friday Night
Jun 5
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
68°F |
6 to 10 mph
S
|
|
Saturday
Jun 6
|
Chance Showers And Thunderstorms
|
86°F |
7 to 10 mph
SW
|
|
Saturday Night
Jun 6
|
Chance Showers And Thunderstorms
|
69°F |
5 to 9 mph
S
|
|
Sunday
Jun 7
|
Chance Showers And Thunderstorms
|
86°F |
6 to 10 mph
S
|
|
Sunday Night
Jun 7
|
Chance Showers And Thunderstorms
|
70°F |
6 to 9 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Petersburg.
