Greenville, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Greenville, IL in one place.
Patchy fog before 4am, then patchy fog and a slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. Wind around 0 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Greenville, 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: Jul 17, 2026 4:12 AM CDT.
The active forecast window currently covers Jul 17 to Jul 23, 2026 for Greenville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 4:12 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greenville
Saturday looks like the warmest upcoming period in Greenville at 91 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 10 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 4:12 AM CDT
- Coverage
- 7 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
Patchy fog and a chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind 0 to 6 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 73. Southwest wind 1 to 5 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 91. Heat index values as high as 102. West wind 3 to 9 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Northwest wind 1 to 7 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 69. Chance of precipitation is 20%.
Mostly sunny, with a high near 91.
Partly cloudy, with a low around 74.
Mostly sunny, with a high near 91.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 82.
Mostly clear, with a low around 62.
Sunny, with a high near 82.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 17
|
Patchy Fog
|
73°F |
0 mph
|
|
Friday
Jul 17
|
Patchy Fog
|
89°F |
0 to 6 mph
W
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Mostly Clear
|
73°F |
1 to 5 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
3 to 9 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
72°F |
1 to 7 mph
NW
|
|
Sunday
Jul 19
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
88°F |
3 mph
NE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
69°F |
0 to 3 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
91°F |
1 to 5 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
74°F |
5 mph
SW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
91°F |
5 to 10 mph
NW
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
68°F |
6 to 9 mph
N
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
82°F |
6 to 9 mph
NE
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
62°F |
2 to 7 mph
NE
|
|
Thursday
Jul 23
|
Sunny
|
82°F |
2 to 6 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Greenville.
Nearby forecast pages are not available for this location yet.
