Tonica, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Tonica, IL in one place.
Showers and thunderstorms likely before 2am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South southwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Tonica, 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: Jun 8, 2026 11:39 PM CDT.
The active forecast window currently covers Jun 8 to Jun 15, 2026 for Tonica, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 8 to Jun 15, 2026
- Latest sync
- Jun 8, 2026 11:39 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Tonica
Wednesday looks like the warmest upcoming period in Tonica at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 20 mph SSW.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 11:39 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly sunny, with a high near 87. West southwest wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms between 7pm and midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Heat index values as high as 98. South southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Partly cloudy, with a low around 72. Southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 80%.
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.
Mostly sunny, with a high near 83.
Clear, with a low around 63.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 86.
A chance of showers and thunderstorms. Partly cloudy, with a low around 62.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 58.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Jun 8
|
Showers And Thunderstorms Likely
|
70°F |
5 mph
SSW
|
|
Tuesday
Jun 9
|
Partly Sunny
|
87°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 9
|
Chance Showers And Thunderstorms
|
72°F |
5 to 10 mph
SSW
|
|
Wednesday
Jun 10
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
90°F |
10 to 20 mph
SSW
|
|
Wednesday Night
Jun 10
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
|
72°F |
15 to 20 mph
SW
|
|
Thursday
Jun 11
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
87°F |
10 to 20 mph
SSW
|
|
Thursday Night
Jun 11
|
Showers And Thunderstorms
|
62°F |
5 to 20 mph
WSW
|
|
Friday
Jun 12
|
Mostly Sunny
|
83°F |
5 to 15 mph
W
|
|
Friday Night
Jun 12
|
Clear
|
63°F |
5 to 10 mph
WSW
|
|
Saturday
Jun 13
|
Sunny then Slight Chance Showers And Thunderstorms
|
86°F |
5 to 15 mph
WSW
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
62°F |
5 to 10 mph
WNW
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
80°F |
10 to 15 mph
NNW
|
|
Sunday Night
Jun 14
|
Slight Chance Showers And Thunderstorms
|
58°F |
5 to 10 mph
NNE
|
|
Monday
Jun 15
|
Chance Showers And Thunderstorms
|
78°F |
5 to 15 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Tonica.