What is today's weather forecast for Round Lake, IL?

Today's forecast for Round Lake shows a high of 26 degrees and a low of 2 degrees Fahrenheit. A slight chance of flurries after 5pm.

What is the 7-day weather forecast for Round Lake, IL?

The 7-day forecast for Round Lake shows highs from 8 to 43 degrees and lows from -5 to 34 degrees Fahrenheit. Expect precipitation on 3 days with chances of 20% or higher.

Will it rain in Round Lake, IL this week?

Yes, rain is possible in Round Lake this week. Precipitation chances: Saturday (40% chance), Wednesday (50% chance), Thursday (50% chance).

How accurate is the Round Lake weather forecast?

WeatherForYou provides highly accurate Round Lake forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Round Lake, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

18°F
Feels Like 18°F

Humidity 86% Dew Point 14°F Wind Calm Barometer 30.15 in.

Solar Rad 43 w/m²

Report from a personal weather station 1.9 mi. E of central Round Lake
at 8:11 AM Fri, Dec 12, 2025

Point Forecast at a Glance

FriDec 12

SatDec 13

40%

-5

SunDec 14

-2

MonDec 15

TueDec 16

WedDec 17

ThuDec 18

50%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures dip from 26°F to a low of 8°F mid-week, then warm to 43°F. Unsettled weather expected with rain or snow likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 9°F below the historical average for December. Normal highs for this period are around 35°F with lows around 21°F.

This Date in Weather History

1960 - The first of three Middle Atlantic snowstorms produced a foot of snow at Baltimore MD. A pre-winter blizzard struck the northeastern U.S. producing wind gusts as high as 51 mph, along with 16 inches of snow at Nantucket MA, and 20 inches at Newark NJ.

Round Lake, IL 7 Day Weather Forecast Details

Friday Dec 12

Day: A slight chance of flurries after 5pm. Increasing clouds, with a high near 26. Northwest wind 5 to 10 mph becoming west southwest in the morning. Winds could gust as high as 15 mph.

Night: A slight chance of flurries before 9pm. Mostly cloudy, with a low around 2. Wind chill values as low as -13. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

Saturday Dec 13

Day: A 40 percent chance of snow after 9am. Mostly cloudy and cold, with a high near 8. Wind chill values as low as -13. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

Night: Mostly clear, with a low around -5. Wind chill values as low as -24. Northwest wind around 15 mph, with gusts as high as 20 mph.

Sunday Dec 14

Day: Sunny and cold, with a high near 9. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

Night: Mostly cloudy, with a low around -2.

Monday Dec 15

Day: Partly sunny, with a high near 20.

Night: Mostly cloudy, with a low around 10.

Tuesday Dec 16

Day: Mostly cloudy, with a high near 35.

Night: Mostly cloudy, with a low around 30.

Wednesday Dec 17

Day: Mostly cloudy, with a high near 43.

Night: A chance of rain. Mostly cloudy, with a low around 34.

Thursday Dec 18

Day: A chance of rain. Partly sunny, with a high near 43.

About Round Lake, IL

Round Lake is a northern suburb in Lake County, Illinois, United States. Per the 2020 census, the population was 18,721.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

Your favorites: