Harlem, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Harlem, IL in one place.
Sunny, with a high near 89. North northeast wind 0 to 5 mph.
Local Weather Overview
This forecast page for Harlem, 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 11, 2026 8:50 PM CDT.
The active forecast window currently covers Jul 12 to Jul 18, 2026 for Harlem, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 12 to Jul 18, 2026
- Latest sync
- Jul 11, 2026 8:50 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Harlem
Tuesday looks like the warmest upcoming period in Harlem at 94 degrees F.
Sunday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 11, 2026 8:50 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 67. East northeast wind 0 to 5 mph.
Sunny, with a high near 91. Heat index values as high as 97. Northwest wind 0 to 5 mph.
Clear, with a low around 70. West northwest wind 0 to 5 mph.
Sunny, with a high near 94.
Clear, with a low around 71.
Sunny, with a high near 94.
Mostly clear, with a low around 70.
Sunny, with a high near 91.
Partly cloudy, with a low around 70.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Jul 12
|
Sunny
|
89°F |
0 to 5 mph
NNE
|
|
Sunday Night
Jul 12
|
Clear
|
67°F |
0 to 5 mph
ENE
|
|
Monday
Jul 13
|
Sunny
|
91°F |
0 to 5 mph
NW
|
|
Monday Night
Jul 13
|
Clear
|
70°F |
0 to 5 mph
WNW
|
|
Tuesday
Jul 14
|
Sunny
|
94°F |
0 to 5 mph
NNW
|
|
Tuesday Night
Jul 14
|
Clear
|
71°F |
0 to 5 mph
WNW
|
|
Wednesday
Jul 15
|
Sunny
|
94°F |
0 to 5 mph
WNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
70°F |
0 to 5 mph
SW
|
|
Thursday
Jul 16
|
Sunny
|
91°F |
0 to 5 mph
SW
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
70°F |
0 to 5 mph
SSW
|
|
Friday
Jul 17
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
90°F |
0 to 10 mph
SW
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
70°F |
5 to 10 mph
SSW
|
|
Saturday
Jul 18
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harlem.