Live Weather & Forecast

Weather in Arlington Heights

Illinois, United States · Real-time conditions & 3-day outlook

Flag of United States
Overcast
26°C
Feels like 26°C
79°F / Feels 80°F
Overcast
Arlington Heights, Illinois
🌞 Daytime
Updated: 2026-04-12 17:30
💧
Humidity
41%
💨
Wind
27.4 km/h SSW
🌬️
Wind Gust
37.9 km/h
🌡️
Pressure
1010 mb
👁️
Visibility
16 km
☀️
UV Index
1.1 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
100%
💦
Dew Point
14.8°C
🌐
Wind Degree
211°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
177.9 μg/m³
NO₂
10.2 μg/m³
O₃
87 μg/m³
SO₂
3.3 μg/m³
PM 2.5
7 μg/m³
PM 10
7.2 μg/m³

Weather Alerts 3

Met · Severe · Immediate
Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T21:24:00-05:00  ·  Expires: 2026-04-12T15:30:00-05:00
Met · Severe · Immediate
Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T21:24:00-05:00  ·  Expires: 2026-04-12T15:30:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 10:46AM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T10:46:00-05:00  ·  Expires: 2026-04-13T05:00:00-05:00

Today's Hourly Forecast

24-hour breakdown for Arlington Heights, Illinois

12 AM
Clear
11°
Clear
💧 61% 💨 14 km/h
1 AM
Clear
11°
Clear
💧 61% 💨 12.6 km/h
2 AM
Clear
11°
Clear
💧 62% 💨 13 km/h
3 AM
Clear
11°
Clear
💧 63% 💨 13.3 km/h
4 AM
Clear
12°
Clear
💧 67% 💨 14.8 km/h
5 AM
Clear
12°
Clear
💧 76% 💨 16.2 km/h
6 AM
Clear
13°
Clear
💧 81% 💨 16.6 km/h
7 AM
Sunny
14°
Sunny
💧 80% 💨 19.1 km/h
8 AM
Sunny
16°
Sunny
💧 75% 💨 20.2 km/h
9 AM
Sunny
19°
Sunny
💧 68% 💨 21.2 km/h
10 AM
Sunny
22°
Sunny
💧 62% 💨 24.1 km/h
11 AM
Sunny
25°
Sunny
💧 57% 💨 25.6 km/h
12 PM
Sunny
25°
Sunny
💧 54% 💨 27 km/h
1 PM
Cloudy
26°
Cloudy
💧 50% 💨 28.1 km/h
2 PM
Partly Cloudy
26°
Partly Cloudy
💧 44% 💨 28.4 km/h
3 PM
Cloudy
27°
Cloudy
💧 44% 💨 27 km/h
4 PM
Partly Cloudy
27°
Partly Cloudy
💧 43% 💨 27.4 km/h
5 PM
Overcast
26°
Overcast
💧 41% 💨 27.4 km/h
6 PM
Patchy rain nearby
26°
Patchy rain nearby
💧 46% 💨 25.6 km/h 🌧️ 64%
7 PM
Partly Cloudy
25°
Partly Cloudy
💧 47% 💨 29.5 km/h
8 PM
Overcast
22°
Overcast
💧 44% 💨 22.7 km/h
9 PM
Patchy rain nearby
20°
Patchy rain nearby
💧 66% 💨 27 km/h 🌧️ 100%
10 PM
Heavy rain at times
19°
Heavy rain at times
💧 87% 💨 24.8 km/h 🌧️ 100%
11 PM
Patchy rain nearby
18°
Patchy rain nearby
💧 89% 💨 26.3 km/h 🌧️ 100%

3-Day Forecast

Daily overview for Arlington Heights, Illinois

Today
Patchy rain nearby
Patchy rain nearby
28° / 10°
🌧️ 88% chance of rain
💧 Avg. humidity: 61%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 3.1 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:16 AM
🌇 Sunset: 07:30 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
Moderate rain
24° / 17°
🌧️ 88% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 27 km/h
🌧️ Total precip: 5.07 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:14 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
27° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 87%
💨 Max wind: 25.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:13 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Arlington Heights

Plan your trip to Arlington Heights, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Arlington Heights 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Arlington Heights?
Current conditions in Arlington Heights: Overcast, temperature 26°C, humidity 41%.
What is the best time to visit Arlington Heights?
The best time to visit Arlington Heights is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Arlington Heights?
Arlington Heights is located at approximately 42.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Arlington Heights?
The wettest period in Arlington Heights is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Arlington Heights?
For visits to Arlington Heights during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Arlington Heights in?
Arlington Heights is located in United States, in the state of Illinois.
What are the public holidays in Arlington Heights in 2026?
View the 2026 public holidays for Arlington Heights on our Holidays page.
What are the GPS coordinates used for the weather forecast in Arlington Heights?
The weather forecast for Arlington Heights uses coordinates 42.0812, -87.9802.