Round Lake, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Round Lake, IL in one place.
A slight chance of rain showers before 7am. Partly sunny, with a high near 80. North northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Round Lake, 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: Jul 8, 2026 11:09 AM CDT.
The active forecast window currently covers Jul 10 to Jul 14, 2026 for Round Lake, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 10 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 11:09 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Round Lake
Tuesday looks like the warmest upcoming period in Round Lake at 90 degrees F.
Friday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Friday at about 5 to 10 mph NNE.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Jul 8, 2026 11:09 AM CDT
- Coverage
- 5 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 63.
Mostly sunny, with a high near 82.
Partly cloudy, with a low around 64.
Sunny, with a high near 85.
Mostly clear, with a low around 67.
Sunny, with a high near 88.
Mostly clear, with a low around 69.
Sunny, with a high near 90.
Mostly clear, with a low around 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 10
|
Slight Chance Rain Showers then Partly Sunny
|
80°F |
5 to 10 mph
NNE
|
|
Friday Night
Jul 10
|
Partly Cloudy
|
63°F |
0 to 5 mph
NE
|
|
Saturday
Jul 11
|
Mostly Sunny
|
82°F |
5 to 10 mph
NE
|
|
Saturday Night
Jul 11
|
Partly Cloudy
|
64°F |
0 to 5 mph
NE
|
|
Sunday
Jul 12
|
Sunny
|
85°F |
0 to 5 mph
NE
|
|
Sunday Night
Jul 12
|
Mostly Clear
|
67°F |
0 to 5 mph
SW
|
|
Monday
Jul 13
|
Sunny
|
88°F |
0 to 5 mph
WNW
|
|
Monday Night
Jul 13
|
Mostly Clear
|
69°F |
0 to 5 mph
W
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
5 to 10 mph
W
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Round Lake.