Harlem, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Harlem, IL in one place.
Mostly sunny, with a high near 84. West 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: May 27, 2026 7:06 PM CDT.
The active forecast window currently covers May 29 to Jun 2, 2026 for Harlem, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 29 to Jun 2, 2026
- Latest sync
- May 27, 2026 7:06 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Harlem
Friday looks like the warmest upcoming period in Harlem at 84 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 53 degrees F.
The strongest winds are forecast for Saturday at about 5 to 15 mph E.
The forecast from May 29 through Jun 2 stays mostly dry.
Forecast Details
- Last updated
- May 27, 2026 7:06 PM CDT
- Coverage
- 5 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
Mostly clear, with a low around 56.
Sunny, with a high near 82.
Partly cloudy, with a low around 54.
Mostly sunny, with a high near 83.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 82.
Mostly clear, with a low around 54.
Sunny, with a high near 81.
Mostly clear, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
May 29
|
Mostly Sunny
|
84°F |
0 to 5 mph
W
|
|
Friday Night
May 29
|
Mostly Clear
|
56°F |
0 to 5 mph
NE
|
|
Saturday
May 30
|
Sunny
|
82°F |
5 to 15 mph
E
|
|
Saturday Night
May 30
|
Partly Cloudy
|
54°F |
5 to 15 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
83°F |
5 mph
ESE
|
|
Sunday Night
May 31
|
Partly Cloudy
|
55°F |
0 to 5 mph
E
|
|
Monday
Jun 1
|
Mostly Sunny
|
82°F |
0 to 15 mph
NE
|
|
Monday Night
Jun 1
|
Mostly Clear
|
54°F |
5 to 15 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
81°F |
5 to 10 mph
NE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
53°F |
5 to 10 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harlem.