Posen, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Posen, IL in one place.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Posen, 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 15, 2026 2:41 AM CDT.
The active forecast window currently covers Apr 17 to Apr 21, 2026 for Posen, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 2:41 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Posen
Friday looks like the warmest upcoming period in Posen at 85 degrees F.
Sunday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Saturday at about 13 to 17 mph SW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 2:41 AM 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
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 73. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 41. Chance of precipitation is 60%.
Sunny, with a high near 61.
Mostly clear, with a low around 39.
Sunny, with a high near 67.
Mostly clear, with a low around 46.
Sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
85°F |
5 to 14 mph
S
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms
|
60°F |
13 mph
S
|
|
Saturday
Apr 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
73°F |
13 to 17 mph
SW
|
|
Saturday Night
Apr 18
|
Showers And Thunderstorms Likely
|
41°F |
9 to 14 mph
NW
|
|
Sunday
Apr 19
|
Sunny
|
61°F |
8 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
39°F |
3 to 8 mph
N
|
|
Monday
Apr 20
|
Sunny
|
67°F |
5 to 8 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
46°F |
7 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
72°F |
6 to 13 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Posen.