Markham, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Markham, IL in one place.
Mostly sunny, with a high near 81. East southeast wind around 2 mph.
Local Weather Overview
This forecast page for Markham, 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: Aug 23, 2026 1:23 PM CDT.
The active forecast window currently covers Aug 24 to Aug 29, 2026 for Markham, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 24 to Aug 29, 2026
- Latest sync
- Aug 23, 2026 1:23 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Markham
Wednesday looks like the warmest upcoming period in Markham at 87 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Thursday at about 2 to 10 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 23, 2026 1:23 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
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 60. East wind around 3 mph.
Mostly sunny, with a high near 83. Southeast wind around 5 mph.
Partly cloudy, with a low around 66. Southeast wind around 3 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Southwest wind 2 to 7 mph.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 65. Chance of precipitation is 30%.
Sunny, with a high near 84.
Mostly clear, with a low around 62.
Sunny, with a high near 83.
Partly cloudy, with a low around 63.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 84.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Mostly Sunny
|
81°F |
2 mph
ESE
|
|
Monday Night
Aug 24
|
Mostly Clear
|
60°F |
3 mph
E
|
|
Tuesday
Aug 25
|
Mostly Sunny
|
83°F |
5 mph
SE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
66°F |
3 mph
SE
|
|
Wednesday
Aug 26
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
87°F |
2 to 7 mph
SW
|
|
Wednesday Night
Aug 26
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
65°F |
1 to 6 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
84°F |
2 to 10 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
62°F |
0 to 8 mph
N
|
|
Friday
Aug 28
|
Sunny
|
83°F |
0 to 5 mph
N
|
|
Friday Night
Aug 28
|
Partly Cloudy
|
63°F |
3 mph
ENE
|
|
Saturday
Aug 29
|
Slight Chance Rain Showers
|
84°F |
3 to 7 mph
SE
|
|
Saturday Night
Aug 29
|
Partly Cloudy then Chance Showers And Thunderstorms
|
67°F |
9 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Markham.