Petersburg, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Petersburg, IL in one place.
Mostly sunny. High near 70, with temperatures falling to around 64 in the afternoon. West wind 3 to 18 mph, with gusts as high as 28 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: Nov 11, 2026 8:02 AM CST.
The active forecast window currently covers Nov 11 to Nov 17, 2026 for Petersburg, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 11 to Nov 17, 2026
- Latest sync
- Nov 11, 2026 8:02 AM CST
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Petersburg
Veterans Day looks like the warmest upcoming period in Petersburg at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 26 degrees F.
The strongest winds are forecast for Veterans Day at about 3 to 18 mph W.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Nov 11, 2026 8:02 AM CST
- Coverage
- 8 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
Partly cloudy, with a low around 42. Northwest wind 7 to 17 mph, with gusts as high as 28 mph.
Scattered rain showers after 10am. Partly sunny, with a high near 50. Northwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 32. North wind 8 to 14 mph.
Mostly sunny. High near 45, with temperatures falling to around 40 in the afternoon. Northwest wind 7 to 14 mph.
Mostly clear, with a low around 26.
Sunny, with a high near 48.
Mostly clear, with a low around 26.
Mostly sunny, with a high near 51.
Partly cloudy, with a low around 29.
Mostly sunny, with a high near 51.
Mostly clear, with a low around 29.
Sunny, with a high near 54.
Mostly clear, with a low around 32.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Veterans Day
Nov 11
|
Mostly Sunny
|
70°F |
3 to 18 mph
W
|
|
Tonight
Nov 11
|
Partly Cloudy
|
42°F |
7 to 17 mph
NW
|
|
Thursday
Nov 12
|
Scattered Rain Showers
|
50°F |
10 to 17 mph
NW
|
|
Thursday Night
Nov 12
|
Partly Cloudy
|
32°F |
8 to 14 mph
N
|
|
Friday
Nov 13
|
Mostly Sunny
|
45°F |
7 to 14 mph
NW
|
|
Friday Night
Nov 13
|
Mostly Clear
|
26°F |
1 to 5 mph
N
|
|
Saturday
Nov 14
|
Sunny
|
48°F |
2 mph
N
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
26°F |
0 mph
|
|
Sunday
Nov 15
|
Mostly Sunny
|
51°F |
0 to 5 mph
E
|
|
Sunday Night
Nov 15
|
Partly Cloudy
|
29°F |
3 mph
E
|
|
Monday
Nov 16
|
Mostly Sunny
|
51°F |
5 mph
E
|
|
Monday Night
Nov 16
|
Mostly Clear
|
29°F |
2 mph
E
|
|
Tuesday
Nov 17
|
Sunny
|
54°F |
1 to 5 mph
E
|
|
Tuesday Night
Nov 17
|
Mostly Clear
|
32°F |
3 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Petersburg.
