Greene County, IL Weather Forecast
County weather hub
Showers And Thunderstorms
Compare major city weather across Greene County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms before 8am, then patchy fog and showers and thunderstorms between 8am and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 79. South wind 7 to 10 mph. Chance of precipitation is 90%.
County Weather Overview
This county weather page brings together forecast coverage for Greene County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Greene County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 8:23 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greene County
Thursday looks like the warmest upcoming period in Greene County at 79 degrees F.
Friday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 17 to 22 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 8:23 AM CDT
- Coverage
- 6 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
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 44. West wind 7 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.
Mostly sunny, with a high near 60. Northwest wind 17 to 22 mph, with gusts as high as 36 mph.
Mostly clear, with a low around 35.
Sunny, with a high near 63.
Clear, with a low around 35.
Sunny, with a high near 70.
Partly cloudy, with a low around 42.
Partly sunny, with a high near 73.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 78.
Mostly clear, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
79°F |
7 to 10 mph
S
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
44°F |
7 to 18 mph
W
|
|
Friday
Oct 16
|
Mostly Sunny
|
60°F |
17 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
35°F |
2 to 15 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
63°F |
1 mph
E
|
|
Saturday Night
Oct 17
|
Clear
|
35°F |
3 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
70°F |
3 to 8 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
42°F |
6 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
73°F |
5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
3 mph
SE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
78°F |
1 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
50°F |
3 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Greene County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Greene County.
Largest mapped city population in this region: 2,269.
