Illinois · NWS LOT office

Round Lake Beach, IL weather

It is 54°F and clear at Chicago/Waukegan Regional Airport as of Oct 28, 4:05 AM CDT. Overnight: Mostly Clear, low near 51°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 3:35 AM CDT.

Updated Oct 28, 4:26 AM CDT (snapshot)

Current conditions

Temperature

54°F

Clear

Wind

SW 7 mph

Humidity 82% · dew point 48°F

Pressure · visibility

30.18 inHg

Visibility 10 mi

Observed at Chicago/Waukegan Regional Airport (KUGN), Oct 28, 4:05 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Round Lake Beach forecast zone right now.

Around the NWS LOT forecast area

No active alerts in zones served by the LOT office near Round Lake Beach.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in Illinois.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Round Lake Beach (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM52°FMostly Clear1%SSW 5 mph
Wed 5 AM52°FMostly Clear1% 0 mph
Wed 6 AM51°FSunny0% 0 mph
Wed 7 AM51°FSunny0% 0 mph
Wed 8 AM52°FSunny0%SSW 5 mph
Wed 9 AM56°FSunny0%SSW 5 mph
Wed 10 AM61°FSunny0%SSW 5 mph
Wed 11 AM65°FSunny0%SSW 10 mph
Wed 12 PM68°FSunny0%SSW 10 mph
Wed 1 PM70°FSunny0%S 10 mph
Wed 2 PM72°FSunny0%S 10 mph
Wed 3 PM72°FSunny0%SSW 15 mph
Wed 4 PM71°FSunny0%SSW 10 mph
Wed 5 PM69°FSunny0%S 10 mph
Wed 6 PM66°FPartly Cloudy1%S 10 mph
Wed 7 PM63°FMostly Clear4%S 10 mph
Wed 8 PM62°FMostly Clear3%S 10 mph
Wed 9 PM62°FMostly Clear3%S 10 mph
Wed 10 PM61°FMostly Clear5%S 10 mph
Wed 11 PM61°FMostly Clear5%SSW 15 mph
Thu 12 AM61°FMostly Clear8%SSW 15 mph
Thu 1 AM61°FMostly Cloudy12%SSW 15 mph
Thu 2 AM61°FPartly Cloudy13%SSW 15 mph
Thu 3 AM61°FSlight Chance Rain Showers20%SSW 15 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Round Lake Beach can differ.

7-day forecast

Overnight

Low 51°F

Mostly clear, with a low around 51. South southwest wind 0 to 5 mph.

Wednesday

High 72°F·Low 58°F

Sunny. High near 72, with temperatures falling to around 69 in the afternoon. South southwest wind 0 to 15 mph.

Wednesday Night: A chance of rain showers after 3am. Partly cloudy, with a low around 58. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Thursday

High 69°F·Low 42°F

A slight chance of rain showers before 8am. Mostly sunny, with a high near 69. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Thursday Night: Mostly clear, with a low around 42. North northwest wind 0 to 5 mph.

Friday

High 61°F·Low 48°F

Partly sunny, with a high near 61.

Friday Night: A slight chance of rain showers after 7pm. Cloudy, with a low around 48.

Saturday

High 61°F·Low 48°F

A chance of rain showers. Cloudy, with a high near 61.

Saturday Night: A chance of rain showers. Cloudy, with a low around 48.

Sunday

High 66°F·Low 50°F

A chance of rain showers. Mostly cloudy, with a high near 66.

Sunday Night: A chance of rain showers. Mostly cloudy, with a low around 50.

Monday

High 66°F·Low 51°F

A chance of rain showers. Mostly cloudy, with a high near 66.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 51.

Tuesday

High 66°F

Rain showers likely. Mostly cloudy, with a high near 66.

Nearby cities

Larger cities in the area

Other cities in Lake County

See every city we cover in Illinois, or check all active alerts.

About this forecast

Forecast office
Round Lake Beach is served by the National Weather Service LOT forecast office, forecast zone ILZ006, county zone ILC097.
Location used
The Census Bureau's internal point for Round Lake Beach (42.3824, -88.0807), in Lake County. Population: 27,091 (2024 estimate), number 77 of the 121 Illinois cities on this site.
Radar
Nearest NWS radar: KMKX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.3824,-88.0807 (forecast issued Oct 28, 3:35 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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