Round Lake Beach, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Round Lake Beach, IL in one place.
Mostly sunny. High near 70, with temperatures falling to around 67 in the afternoon. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Round Lake Beach, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 8, 2026 12:46 PM CDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Round Lake Beach, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 12:46 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Round Lake Beach
Saturday looks like the warmest upcoming period in Round Lake Beach at 79 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 43 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph SSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 12:46 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 48. Northwest wind 0 to 5 mph.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm. Partly sunny. High near 72, with temperatures falling to around 70 in the afternoon. Southeast wind 0 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 58. South southeast wind around 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly cloudy, with a low around 58.
Partly sunny, with a high near 72.
Partly cloudy, with a low around 54.
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
A chance of rain showers before 7am. Partly sunny, with a high near 64.
Partly cloudy, with a low around 43.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 62.
A chance of rain showers after 7pm. Partly cloudy, with a low around 47.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 8
|
Mostly Sunny
|
70°F |
5 to 10 mph
WNW
|
|
Tonight
Oct 8
|
Partly Cloudy
|
48°F |
0 to 5 mph
NW
|
|
Friday
Oct 9
|
Partly Sunny then Chance Showers And Thunderstorms
|
72°F |
0 to 10 mph
SE
|
|
Friday Night
Oct 9
|
Mostly Clear
|
58°F |
10 mph
SSE
|
|
Saturday
Oct 10
|
Sunny
|
79°F |
10 to 15 mph
SSW
|
|
Saturday Night
Oct 10
|
Mostly Cloudy
|
58°F |
5 to 10 mph
S
|
|
Sunday
Oct 11
|
Partly Sunny
|
72°F |
5 mph
SSE
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
54°F |
0 to 5 mph
SSW
|
|
Columbus Day
Oct 12
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
77°F |
0 to 10 mph
SW
|
|
Monday Night
Oct 12
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
53°F |
5 to 10 mph
W
|
|
Tuesday
Oct 13
|
Chance Rain Showers then Partly Sunny
|
64°F |
10 mph
NNW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy
|
43°F |
0 to 5 mph
NNW
|
|
Wednesday
Oct 14
|
Slight Chance Rain Showers
|
62°F |
0 to 5 mph
SW
|
|
Wednesday Night
Oct 14
|
Chance Rain Showers
|
47°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Round Lake Beach.