Arlington Heights, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Arlington Heights, IL in one place.
Sunny. High near 70, with temperatures falling to around 68 in the afternoon. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Arlington 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: Oct 8, 2026 11:53 AM CDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Arlington Heights, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 11:53 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Arlington Heights
Saturday looks like the warmest upcoming period in Arlington Heights at 80 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph SSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 11:53 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
Partly cloudy, with a low around 51. Northwest wind 0 to 5 mph.
A chance of rain showers between noon and 2pm, then a chance of showers and thunderstorms between 2pm and 5pm. Partly sunny. High near 73, with temperatures falling to around 71 in the afternoon. South southeast wind 0 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 60. South southeast wind around 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly cloudy, with a low around 60.
Partly sunny, with a high near 72.
Partly cloudy, with a low around 57.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
A chance of rain showers before 7am. Partly sunny, with a high near 65.
Partly cloudy, with a low around 46.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 63.
A chance of rain showers after 7pm. Partly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 8
|
Sunny
|
70°F |
5 to 10 mph
WNW
|
|
Tonight
Oct 8
|
Partly Cloudy
|
51°F |
0 to 5 mph
NW
|
|
Friday
Oct 9
|
Partly Sunny then Chance Showers And Thunderstorms
|
73°F |
0 to 10 mph
SSE
|
|
Friday Night
Oct 9
|
Mostly Clear
|
60°F |
10 mph
SSE
|
|
Saturday
Oct 10
|
Sunny
|
80°F |
10 to 15 mph
SSW
|
|
Saturday Night
Oct 10
|
Mostly Cloudy
|
60°F |
5 to 10 mph
S
|
|
Sunday
Oct 11
|
Partly Sunny
|
72°F |
5 mph
SE
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
57°F |
0 to 5 mph
S
|
|
Columbus Day
Oct 12
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
78°F |
0 to 10 mph
SW
|
|
Monday Night
Oct 12
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
56°F |
5 to 10 mph
W
|
|
Tuesday
Oct 13
|
Chance Rain Showers then Partly Sunny
|
65°F |
10 mph
NNW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy
|
46°F |
5 to 10 mph
NNW
|
|
Wednesday
Oct 14
|
Slight Chance Rain Showers
|
63°F |
5 mph
E
|
|
Wednesday Night
Oct 14
|
Chance Rain Showers
|
49°F |
5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Arlington Heights.
