Round Lake Park, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Round Lake Park, a village in Lake County, Illinois.
Today
64°F
Scattered Rain Showers then Patchy Drizzle
Scattered rain showers before 10am, then patchy drizzle and isolated rain showers. Mostly cloudy. High near 64, with temperatures falling to around 55 in the afternoon. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Round Lake Park
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Scattered Rain Showers then Patchy Drizzle | 15 mph SSW | 33% |
| Tonight | 47°F | Patchy Drizzle | 15 mph SW | 15% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph WSW | 35% |
| Thursday Night | 39°F | Chance Rain Showers then Cloudy | 10 to 15 mph NW | 54% |
| Friday | 49°F | Mostly Cloudy | 10 to 15 mph NNW | 11% |
| Friday Night | 33°F | Partly Cloudy | 5 to 10 mph NNW | 1% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 60°F | Mostly Sunny | 0 to 10 mph WSW | 0% |
| Monday Night | 39°F | Partly Cloudy | 5 mph WSW | 1% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov) for Round Lake Park (42.341, -88.081). Updated through the day.
Growing snapshot for Round Lake Park
Last spring frost
Apr 24
First fall frost
Oct 23
Growing season
180 days
Hardiness zone
5b
More local growing data for Round Lake Park: nearby ZIP 60073 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Highwood
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Island Lake
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Lake Bluff
Lake Forest
Lake Villa
Lake Zurich
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Lincolnshire
Climate data from the nearest NOAA station, Lake Villa 2Ne, Il (5.7 mi from Round Lake Park). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.