Mundelein, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mundelein, a village in Lake County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Mundelein
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SW | 44% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 0 to 5 mph WSW | 74% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph NW | 82% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 54% |
| Thursday Night | 61°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 15% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SSW | 3% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph SSE | 8% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 15% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 21% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 mph SSW | 46% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 mph W | 48% |
Forecast source: National Weather Service (api.weather.gov) for Mundelein (42.269, -88.011). Updated through the day.
Growing snapshot for Mundelein
Last spring frost
Apr 29
First fall frost
Oct 20
Growing season
172 days
Hardiness zone
5b
More local growing data for Mundelein: nearby ZIP 60060 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Mundelein 4 Wsw, Il (2.2 mi from Mundelein). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.