Prospect Heights, IL Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Prospect Heights, IL in one place.
Partly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Prospect 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: Aug 27, 2026 9:27 PM CDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Prospect Heights, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 27, 2026 9:27 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Prospect Heights
Tuesday looks like the warmest upcoming period in Prospect Heights at 89 degrees F.
Saturday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Saturday Night at about 10 to 15 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 27, 2026 9:27 PM CDT
- Coverage
- 6 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 between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 10 to 15 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74.
A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 88.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 75.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 88.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Partly Sunny
|
82°F |
5 to 10 mph
SSW
|
|
Saturday Night
Aug 29
|
Chance Showers And Thunderstorms
|
69°F |
10 to 15 mph
S
|
|
Sunday
Aug 30
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
87°F |
15 mph
SSW
|
|
Sunday Night
Aug 30
|
Mostly Cloudy then Slight Chance Showers And Thunderstorms
|
74°F |
10 to 15 mph
SSW
|
|
Monday
Aug 31
|
Slight Chance Showers And Thunderstorms
|
88°F |
10 mph
SW
|
|
Monday Night
Aug 31
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
75°F |
5 to 10 mph
SW
|
|
Tuesday
Sep 1
|
Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
SW
|
|
Tuesday Night
Sep 1
|
Partly Cloudy then Chance Showers And Thunderstorms
|
73°F |
0 to 5 mph
SW
|
|
Wednesday
Sep 2
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
88°F |
5 mph
SW
|
|
Wednesday Night
Sep 2
|
Partly Cloudy then Chance Showers And Thunderstorms
|
71°F |
5 mph
SSW
|
|
Thursday
Sep 3
|
Chance Showers And Thunderstorms
|
86°F |
5 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Prospect Heights.