Tennessee, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Tennessee, IL in one place.
Showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Cloudy, with a high near 70. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Tennessee, 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: Oct 14, 2026 3:53 AM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Tennessee, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 3:53 AM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Tennessee
Tuesday looks like the warmest upcoming period in Tennessee at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Thursday Night at about 10 to 30 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 3:53 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KILX
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 before 7pm, then showers and thunderstorms likely between 7pm and 1am. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Mostly sunny, with a high near 56.
Patchy frost after 5am. Mostly clear, with a low around 36.
Patchy frost before 8am. Sunny, with a high near 59.
Clear, with a low around 39.
Sunny, with a high near 68.
Partly cloudy, with a low around 46.
Partly sunny, with a high near 70.
Partly cloudy, with a low around 48.
Sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
70°F |
5 to 10 mph
SE
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
45°F |
10 to 30 mph
NW
|
|
Friday
Oct 16
|
Mostly Sunny
|
56°F |
20 to 30 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear then Patchy Frost
|
36°F |
0 to 15 mph
N
|
|
Saturday
Oct 17
|
Patchy Frost then Sunny
|
59°F |
0 to 5 mph
S
|
|
Saturday Night
Oct 17
|
Clear
|
39°F |
0 to 5 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
5 to 15 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
46°F |
5 to 10 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
70°F |
5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
48°F |
0 to 5 mph
S
|
|
Tuesday
Oct 20
|
Sunny
|
76°F |
0 to 5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Tennessee.