Greenville, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Greenville, IL in one place.
Showers and thunderstorms likely. Partly sunny, with a high near 70. Chance of precipitation is 70%.
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: Apr 14, 2026 8:20 PM CDT.
The active forecast window currently covers Apr 18 to Apr 21, 2026 for Greenville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 21, 2026
- Latest sync
- Apr 14, 2026 8:20 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greenville
Saturday looks like the warmest upcoming period in Greenville at 70 degrees F.
Sunday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Saturday at about 12 to 17 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 8:20 PM CDT
- Coverage
- 4 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 rain showers before 1am. Partly cloudy, with a low around 40. Chance of precipitation is 50%.
Sunny, with a high near 59.
Mostly clear, with a low around 37.
Sunny, with a high near 65.
Mostly clear, with a low around 44.
Sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Showers And Thunderstorms Likely
|
70°F |
12 to 17 mph
SW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
40°F |
8 to 15 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
59°F |
8 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
37°F |
3 to 9 mph
W
|
|
Monday
Apr 20
|
Sunny
|
65°F |
5 to 8 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
44°F |
7 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
70°F |
6 to 13 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Greenville.
Nearby forecast pages are not available for this location yet.
