Live Weather & Forecast

Weather in Round Lake Beach

Q: What is the current weather in Round Lake Beach?

Current conditions in Round Lake Beach: Partly cloudy, temperature 26°C, humidity 45%.

Q: What is the best time to visit Round Lake Beach?

The best time to visit Round Lake Beach is typically June – September. Warm, dry summers — ideal for outdoor activities.

Q: What are the GPS coordinates used for the weather forecast in Round Lake Beach?

The weather forecast for Round Lake Beach uses coordinates 42.3717, -88.0901.

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

26^°C

Feels like 26°C

78°F / Feels 79°F

Partly cloudy

Round Lake Beach, Illinois

🌞 Daytime

Updated: 2026-04-12 17:30

💧

Humidity

45%

💨

Wind

30.6 km/h SW

🌬️

Wind Gust

44.1 km/h

🌡️

Pressure

1008 mb

👁️

Visibility

16 km

☀️

UV Index

1.2 (Low)

🌧️

Precipitation

0.01 mm

☁️

Cloud Cover

75%

💦

Dew Point

13.6°C

🌐

Wind Degree

215°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)

176.9 μg/m³

NO₂

7.1 μg/m³

O₃

85 μg/m³

SO₂

2.1 μg/m³

PM 2.5

5.4 μg/m³

PM 10

5.6 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

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...

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

Today's Hourly Forecast

24-hour breakdown for Round Lake Beach, Illinois

12 AM

9°

Clear

💧 68% 💨 16.2 km/h

1 AM

9°

Clear

💧 70% 💨 16.6 km/h

2 AM

9°

Clear

💧 72% 💨 15.1 km/h

3 AM

9°

Clear

💧 73% 💨 15.1 km/h

4 AM

10°

Clear

💧 73% 💨 15.8 km/h

5 AM

11°

Clear

💧 78% 💨 16.9 km/h

6 AM

12°

Clear

💧 81% 💨 16.9 km/h

7 AM

13°

Sunny

💧 84% 💨 20.2 km/h

8 AM

15°

Sunny

💧 82% 💨 22.7 km/h

9 AM

17°

Sunny

💧 80% 💨 24.1 km/h

10 AM

20°

Sunny

💧 78% 💨 30.2 km/h

11 AM

23°

Sunny

💧 72% 💨 31.3 km/h

12 PM

25°

Sunny

💧 65% 💨 32.4 km/h

1 PM

25°

Sunny

💧 57% 💨 33.5 km/h

2 PM

26°

Sunny

💧 52% 💨 34.2 km/h

3 PM

27°

Partly Cloudy

💧 50% 💨 31 km/h

4 PM

26°

Patchy rain nearby

💧 47% 💨 31.3 km/h 🌧️ 89%

5 PM

26°

Partly cloudy

💧 45% 💨 30.6 km/h 🌧️ 84%

6 PM

24°

Patchy rain nearby

💧 59% 💨 29.5 km/h 🌧️ 61%

7 PM

23°

Sunny

💧 61% 💨 31.7 km/h

8 PM

21°

Patchy rain nearby

💧 59% 💨 25.9 km/h 🌧️ 66%

9 PM

19°

Patchy rain nearby

💧 63% 💨 29.9 km/h 🌧️ 74%

10 PM

18°

Light rain

💧 88% 💨 29.9 km/h 🌧️ 100%

11 PM

17°

Patchy rain nearby

💧 91% 💨 31 km/h 🌧️ 100%

3-Day Forecast

Daily overview for Round Lake Beach, Illinois

Today

Patchy rain nearby

28° / 9°

🌧️ 89% chance of rain

💧 Avg. humidity: 69%

💨 Max wind: 34.2 km/h

🌧️ Total precip: 2.99 mm

☀️ UV Index: 1.5

🌅 Sunrise: 06:16 AM

🌇 Sunset: 07:31 PM

🌙 Waning Crescent

🌑 Moon: 33% lit

Mon, Apr 13

Patchy rain nearby

24° / 16°

🌧️ 82% chance of rain

💧 Avg. humidity: 89%

💨 Max wind: 29.5 km/h

🌧️ Total precip: 3.07 mm

☀️ UV Index: 0.9

🌅 Sunrise: 06:14 AM

🌇 Sunset: 07:32 PM

🌙 Waning Crescent

🌑 Moon: 23% lit

Tue, Apr 14

Thundery outbreaks in nearby

26° / 19°

🌧️ 0% chance of rain

💧 Avg. humidity: 89%

💨 Max wind: 27.7 km/h

🌧️ Total precip: 0 mm

☀️ UV Index: 1.1

🌅 Sunrise: 06:12 AM

🌇 Sunset: 07:33 PM

🌙 Waning Crescent

🌑 Moon: 15% lit

Best Time to Visit Round Lake Beach

Plan your trip to Round Lake Beach, 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 Round Lake Beach 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Round Lake Beach?

Current conditions in Round Lake Beach: Partly cloudy, temperature 26°C, humidity 45%.

What is the best time to visit Round Lake Beach?

The best time to visit Round Lake Beach is typically June – September. Warm, dry summers — ideal for outdoor activities.

What is the climate like in Round Lake Beach?

Round Lake Beach is located at approximately 42.4° latitude. It has a temperate climate with warm summers and cold winters.

Does it rain a lot in Round Lake Beach?

The wettest period in Round Lake Beach is typically during November – March. Cooler temperatures; some regions may experience rain or snow.

What should I pack for a trip to Round Lake Beach?

For visits to Round Lake Beach during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.

What country is Round Lake Beach in?

Round Lake Beach is located in United States, in the state of Illinois.

What are the public holidays in Round Lake Beach in 2026?

View the 2026 public holidays for Round Lake Beach on our Holidays page.

What are the GPS coordinates used for the weather forecast in Round Lake Beach?

The weather forecast for Round Lake Beach uses coordinates 42.3717, -88.0901.