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Mundelein, IL Weather & Growing Conditions

This Afternoon
76°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then showers and thunderstorms likely. Cloudy. High near 76, with temperatures falling to around 72 in the afternoon. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 76°F Showers And Thunderstorms Likely 5 to 10 mph S 64%
Tonight 62°F Showers And Thunderstorms 5 to 10 mph ENE 95%
Sunday 68°F Showers And Thunderstorms Likely 10 to 15 mph NNE 55%
Sunday Night 56°F Mostly Cloudy then Slight Chance Rain Showers 15 mph NE 15%
Monday 63°F Slight Chance Rain Showers 15 mph ENE 22%
Monday Night 52°F Mostly Cloudy 10 to 15 mph ENE 13%
Tuesday 62°F Mostly Cloudy 10 to 15 mph NE 11%
Tuesday Night 52°F Mostly Cloudy 5 to 15 mph NE 6%
Wednesday 63°F Partly Sunny 5 to 10 mph NE 13%
Wednesday Night 52°F Mostly Cloudy 5 to 10 mph NE 5%
Thursday 66°F Partly Sunny 5 to 10 mph NNE 4%
Thursday Night 52°F Mostly Cloudy 0 to 5 mph NNE 4%
Friday 69°F Partly Sunny 5 to 10 mph NE 5%
Friday Night 52°F Partly Cloudy 0 to 5 mph NE 3%

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

Growing snapshot for Mundelein, IL

Last spring frost
Apr 29
First fall frost
Oct 20
Growing season
172 days
Hardiness zone
5b

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

Climate data from the nearest NOAA station, Mundelein 4 Wsw, Il (2.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.