Lostant, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Lostant, IL in one place.
Showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 80. Northwest wind 0 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Local Weather Overview
This forecast page for Lostant, 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: Sep 17, 2026 12:48 AM CDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Lostant, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 12:48 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lostant
Saturday looks like the warmest upcoming period in Lostant at 87 degrees F.
Monday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Sunday Night at about 5 to 15 mph ENE.
Precipitation is mentioned in 13 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 12:48 AM 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
Mostly cloudy, with a low around 64. North northeast wind around 5 mph, with gusts as high as 15 mph. New rainfall amounts less than a tenth of an inch possible.
Isolated showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 80. East wind 5 to 10 mph. Chance of precipitation is 20%.
Isolated showers and thunderstorms after 1am. Partly cloudy, with a low around 68. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Scattered showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Scattered showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 66.
Showers and thunderstorms likely. Mostly cloudy, with a high near 76.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 74.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
A chance of rain showers. Partly sunny, with a high near 73.
A slight chance of rain showers. Mostly cloudy, with a low around 57.
A slight chance of rain showers before 1pm. Mostly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
80°F |
0 to 5 mph
NW
|
|
Thursday Night
Sep 17
|
Mostly Cloudy
|
64°F |
5 mph
NNE
|
|
Friday
Sep 18
|
Isolated Showers And Thunderstorms
|
80°F |
5 to 10 mph
E
|
|
Friday Night
Sep 18
|
Partly Cloudy then Isolated Showers And Thunderstorms
|
68°F |
10 mph
SE
|
|
Saturday
Sep 19
|
Scattered Showers And Thunderstorms
|
87°F |
10 mph
SSW
|
|
Saturday Night
Sep 19
|
Scattered Showers And Thunderstorms then Showers And Thunderstorms Likely
|
66°F |
5 mph
NW
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
76°F |
5 to 10 mph
NE
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
60°F |
5 to 15 mph
ENE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
74°F |
5 to 10 mph
ENE
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
57°F |
5 to 10 mph
NE
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
73°F |
5 to 10 mph
NNE
|
|
Tuesday Night
Sep 22
|
Slight Chance Rain Showers
|
57°F |
5 to 10 mph
N
|
|
Wednesday
Sep 23
|
Slight Chance Rain Showers
|
75°F |
5 mph
NNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lostant.