Round Lake Beach, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Round Lake Beach, IL in one place.
Sunny, with a high near 84. South southwest wind 5 to 10 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: May 24, 2026 12:28 PM CDT.
The active forecast window currently covers May 25 to May 30, 2026 for Round Lake Beach, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 25 to May 30, 2026
- Latest sync
- May 24, 2026 12:28 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Round Lake Beach
Tuesday looks like the warmest upcoming period in Round Lake Beach at 85 degrees F.
Friday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Thursday at about 5 to 15 mph NE.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- May 24, 2026 12:28 PM CDT
- Coverage
- 6 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
Mostly clear, with a low around 61. South southwest wind 5 to 10 mph.
Mostly sunny, with a high near 85. South wind 0 to 5 mph, with gusts as high as 15 mph.
Partly cloudy, with a low around 62.
A slight chance of rain showers between 7am and 1pm. Partly sunny, with a high near 81.
Partly cloudy, with a low around 58.
Mostly sunny, with a high near 78.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 74.
Partly cloudy, with a low around 54.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Sunny
|
84°F |
5 to 10 mph
SSW
|
|
Monday Night
May 25
|
Mostly Clear
|
61°F |
5 to 10 mph
SSW
|
|
Tuesday
May 26
|
Mostly Sunny
|
85°F |
0 to 5 mph
S
|
|
Tuesday Night
May 26
|
Partly Cloudy
|
62°F |
0 to 5 mph
ESE
|
|
Wednesday
May 27
|
Slight Chance Rain Showers
|
81°F |
0 to 10 mph
NE
|
|
Wednesday Night
May 27
|
Partly Cloudy
|
58°F |
5 to 10 mph
NE
|
|
Thursday
May 28
|
Mostly Sunny
|
78°F |
5 to 15 mph
NE
|
|
Thursday Night
May 28
|
Partly Cloudy
|
55°F |
5 to 15 mph
NE
|
|
Friday
May 29
|
Mostly Sunny
|
74°F |
10 to 15 mph
NE
|
|
Friday Night
May 29
|
Partly Cloudy
|
54°F |
5 to 15 mph
ENE
|
|
Saturday
May 30
|
Mostly Sunny
|
74°F |
5 to 15 mph
ENE
|
|
Saturday Night
May 30
|
Mostly Clear
|
54°F |
5 to 15 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Round Lake Beach.