Cortland, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Cortland, IL in one place.
Mostly cloudy, with a high near 76. East wind around 15 mph, with gusts as high as 25 mph.
Local Weather Overview
This forecast page for Cortland, 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: May 30, 2026 7:55 PM CDT.
The active forecast window currently covers May 30 to Jun 5, 2026 for Cortland, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 5, 2026
- Latest sync
- May 30, 2026 7:55 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Cortland
Thursday looks like the warmest upcoming period in Cortland at 86 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for This Afternoon at about 15 mph E.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 7:55 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
Mostly cloudy, with a low around 53. East wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly sunny, with a high near 77. Southeast wind 5 to 10 mph.
Mostly cloudy, with a low around 55. East wind around 5 mph.
Mostly sunny, with a high near 80. East northeast wind 5 to 10 mph.
Mostly clear, with a low around 53.
Sunny, with a high near 79.
Clear, with a low around 51.
Sunny, with a high near 84.
Mostly clear, with a low around 56.
Mostly sunny, with a high near 86.
A slight chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 62.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
May 30
|
Mostly Cloudy
|
76°F |
15 mph
E
|
|
Tonight
May 30
|
Mostly Cloudy
|
53°F |
10 to 15 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
77°F |
5 to 10 mph
SE
|
|
Sunday Night
May 31
|
Mostly Cloudy
|
55°F |
5 mph
E
|
|
Monday
Jun 1
|
Mostly Sunny
|
80°F |
5 to 10 mph
ENE
|
|
Monday Night
Jun 1
|
Mostly Clear
|
53°F |
5 to 10 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
79°F |
5 to 10 mph
ENE
|
|
Tuesday Night
Jun 2
|
Clear
|
51°F |
5 to 10 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
84°F |
5 mph
SE
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
56°F |
5 mph
S
|
|
Thursday
Jun 4
|
Mostly Sunny
|
86°F |
5 to 15 mph
SSW
|
|
Thursday Night
Jun 4
|
Slight Chance Showers And Thunderstorms
|
62°F |
10 mph
SW
|
|
Friday
Jun 5
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
86°F |
10 to 15 mph
SW
|
|
Friday Night
Jun 5
|
Chance Showers And Thunderstorms
|
63°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cortland.