Sparta, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sparta, IL in one place.
Mostly sunny, with a high near 78.
Local Weather Overview
This forecast page for Sparta, 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 20, 2026 5:15 AM CDT.
The active forecast window currently covers Apr 23 to Apr 26, 2026 for Sparta, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 23 to Apr 26, 2026
- Latest sync
- Apr 20, 2026 5:15 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sparta
Thursday looks like the warmest upcoming period in Sparta at 78 degrees F.
Saturday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Thursday at about 7 to 16 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 20, 2026 5:15 AM 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 showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 72. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 51. Chance of precipitation is 40%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 71. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Mostly Sunny
|
78°F |
7 to 16 mph
S
|
|
Thursday Night
Apr 23
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
62°F |
12 to 15 mph
S
|
|
Friday
Apr 24
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
74°F |
12 mph
SW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms Likely
|
53°F |
9 mph
NW
|
|
Saturday
Apr 25
|
Chance Showers And Thunderstorms
|
72°F |
8 mph
N
|
|
Saturday Night
Apr 25
|
Chance Showers And Thunderstorms
|
51°F |
7 mph
N
|
|
Sunday
Apr 26
|
Chance Rain Showers
|
71°F |
8 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sparta.
