Chicago Heights, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Chicago Heights, IL in one place.
A slight chance of rain showers after 5am. Mostly cloudy. Low around 66, with temperatures rising to around 69 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Chicago Heights, 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 15, 2026 4:00 AM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Chicago Heights, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 4:00 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Chicago Heights
Tuesday looks like the warmest upcoming period in Chicago Heights at 87 degrees F.
Sunday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Overnight at about 15 mph S.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 4:00 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
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a chance of showers and thunderstorms. Partly sunny. High near 87, with temperatures falling to around 83 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 9pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. North wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 67. East southeast wind 0 to 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65.
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84.
A chance of 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 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 15
|
Slight Chance Rain Showers
|
66°F |
15 mph
S
|
|
Tuesday
Sep 15
|
Chance Showers And Thunderstorms
|
87°F |
10 to 15 mph
SW
|
|
Tuesday Night
Sep 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
66°F |
5 mph
N
|
|
Wednesday
Sep 16
|
Showers And Thunderstorms Likely
|
76°F |
5 mph
NE
|
|
Wednesday Night
Sep 16
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
67°F |
0 to 5 mph
ESE
|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
80°F |
5 mph
WNW
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
65°F |
5 to 10 mph
NNE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
79°F |
5 to 10 mph
ENE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
65°F |
10 mph
ESE
|
|
Saturday
Sep 19
|
Chance Showers And Thunderstorms
|
84°F |
10 to 15 mph
SSW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
66°F |
10 mph
W
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
76°F |
10 to 15 mph
N
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
58°F |
10 to 15 mph
NE
|
|
Monday
Sep 21
|
Slight Chance Showers And Thunderstorms
|
72°F |
10 to 15 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chicago Heights.
