Preston, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Preston, IL in one place.
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms. Mostly sunny. High near 92, with temperatures falling to around 88 in the afternoon. Heat index values as high as 103. Southwest wind around 6 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Preston, 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 9, 2026 12:47 AM CDT.
The active forecast window currently covers Jul 9 to Jul 15, 2026 for Preston, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 15, 2026
- Latest sync
- Jul 9, 2026 12:47 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Preston
Thursday looks like the warmest upcoming period in Preston at 92 degrees F.
Sunday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Thursday at about 6 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 12:47 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
A chance of showers and thunderstorms before 11pm, then showers and thunderstorms likely between 11pm and 2am, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 72. South wind around 5 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Heat index values as high as 100. Southwest wind around 6 mph. Chance of precipitation is 30%.
Showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. Southwest wind around 3 mph. Chance of precipitation is 80%.
Showers and thunderstorms likely before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunny, with a high near 87.
Mostly clear, with a low around 68.
Sunny, with a high near 89.
Mostly clear, with a low around 69.
Sunny, with a high near 90.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Mostly Sunny then Chance Showers And Thunderstorms
|
92°F |
6 mph
SW
|
|
Thursday Night
Jul 9
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
72°F |
5 mph
S
|
|
Friday
Jul 10
|
Chance Showers And Thunderstorms
|
89°F |
6 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms
|
70°F |
3 mph
SW
|
|
Saturday
Jul 11
|
Showers And Thunderstorms Likely
|
87°F |
5 mph
NW
|
|
Saturday Night
Jul 11
|
Showers And Thunderstorms Likely
|
68°F |
3 mph
NE
|
|
Sunday
Jul 12
|
Chance Rain Showers
|
85°F |
2 to 6 mph
NE
|
|
Sunday Night
Jul 12
|
Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
1 to 5 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
87°F |
6 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
68°F |
1 to 5 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
89°F |
5 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
69°F |
0 to 3 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
90°F |
3 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Preston.