Round Lake Heights Weather Forecast

Current Conditions & 10-Day Outlook

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Current Weather Conditions in Round Lake Heights

Round Lake Heights

Illinois, United States

weather iconClear sky
28°
Low 9°
High 28°

Hourly Round Lake Heights Weather Forecast

12 AMweather icon17°
1 AMweather icon15°
2 AMweather icon13°
3 AMweather icon12°
4 AMweather icon11°
5 AMweather icon10°
6 AMweather icon10°
7 AMweather icon9°
8 AMweather icon9°
9 AMweather icon9°
10 AMweather icon9°
11 AMweather icon9°
12 PMweather icon11°
1 PMweather icon15°
2 PMweather icon18°
3 PMweather icon21°
4 PMweather icon24°
5 PMweather icon26°
6 PMweather icon26°
7 PMweather icon27°
8 PMweather icon28°
9 PMweather icon28°
10 PMweather icon26°
11 PMweather icon25°
Wind
3kt SE

Very gentle wind.

3kt
NESW
Precipitation
0%

Minimal chance of precipitation.

Round Lake Heights 10-Day Weather Outlook

Today's Weather in Round Lake Heights, Illinois, United States

Fri, May 29

Showers svg
9°
28°

Sat, May 30

Showers svg
11°
23°

Sun, May 31

Showers svg
12°
22°

Mon, Jun 01

Showers svg
13°
23°

Tue, Jun 02

Showers svg
11°
22°

Wed, Jun 03

Showers svg
12°
25°

Thu, Jun 04

Showers svg
14°
26°

Fri, Jun 05

Showers svg
17°
25°

Sat, Jun 06

Showers svg
13°
25°

Feels like

28°

Feels warmer than actual temperature.

Pressure

986 hPa

Expect unstable weather conditions.

Humidity

38%

Moderate humidity.

UV

7 - High

Take precautions.

Gusts

11kt

Max speed of wind gusts today.

Cloud Cover

1%

Clear skies, no clouds expected.

Daylight

15h 0m

Long days, short nights.

Rain

0.0mm

No rain, dry conditions expected.

Snowfall

0.0mm

No snowfall expected.

Historical Climate Data

10 year average

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Current Air Quality in Round Lake Heights

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About Round Lake Heights Weather

General

This page provides the current weather forecast for Round Lake Heights, Illinois, United States, including hourly conditions, a 10-day outlook, wind speed and direction, precipitation, UV index, and air quality - giving you everything you need to plan your day in one view.

Forecast & Methodology

The forecast data on this page is sourced from the ECMWF open-source model - a reliable global model used widely across weather services worldwide. For sailors, boaters, and mariners who need greater accuracy and higher resolution, PredictWind's proprietary forecast models deliver precision down to 1km resolution, updated multiple times daily and validated against real-world observations. Sign up free to access PredictWind's advanced forecasts.

Sailing & Marine Conditions

Round Lake Heights weather forecasts on PredictWind are optimised for sailors and boaters who need precise, reliable wind and wave data for passage planning and day sailing. PredictWind is used by ocean racers, cruising sailors, and commercial vessel operators across United States and worldwide. For detailed marine conditions including wave height, swell period, and offshore wind forecasts, sign up free to access PredictWind's full marine forecast suite.

Units

Wind speed is displayed in knots - the standard unit used by sailors, weather services, and maritime authorities. Temperature is shown in degrees Celsius. Use the toggle at the top of the page to switch between Celsius and Fahrenheit. Pressure is shown in hPa, rainfall in millimetres, and air quality is available in both US and EU AQI standards.