Harman US

Vernon Hills, IL Weather & Growing Conditions

Overnight
61°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 4am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 61, with temperatures rising to around 64 overnight. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Overnight 61°F Showers And Thunderstorms Likely 10 mph ESE 98%
Saturday 76°F Showers And Thunderstorms then Showers And Thunderstorms Likely 5 to 10 mph SSE 100%
Saturday Night 62°F Showers And Thunderstorms 5 to 10 mph ENE 95%
Sunday 69°F Showers And Thunderstorms Likely 10 to 15 mph NNE 56%
Sunday Night 56°F Slight Chance Rain Showers 15 mph NE 15%
Monday 64°F Slight Chance Rain Showers 15 mph ENE 21%
Monday Night 52°F Mostly Cloudy 10 to 15 mph ENE 12%
Tuesday 62°F Mostly Cloudy 10 to 15 mph NE 11%
Tuesday Night 52°F Mostly Cloudy 5 to 15 mph NE 7%
Wednesday 64°F Partly Sunny 5 to 10 mph NE 13%
Wednesday Night 53°F Mostly Cloudy 5 to 10 mph NE 5%
Thursday 66°F Partly Sunny 5 to 10 mph NNE 4%
Thursday Night 53°F Mostly Cloudy 0 to 5 mph NNE 4%
Friday 69°F Partly Sunny 0 to 10 mph NE 5%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Vernon Hills, IL

Last spring frost
Apr 29
First fall frost
Oct 20
Growing season
172 days
Hardiness zone
6a

Explore more for Vernon Hills, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Mundelein 4 Wsw, Il (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.