Mundelein, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mundelein, a village in Lake County, Illinois.
This Afternoon
71°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy. High near 71, with temperatures falling to around 69 in the afternoon. East wind 10 to 15 mph. Chance of precipitation is 20%.
7-day forecast for Mundelein
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Slight Chance Rain Showers | 10 to 15 mph E | 21% |
| Tonight | 61°F | Slight Chance Rain Showers then Showers And Thunderstorms Likely | 10 to 15 mph E | 66% |
| Saturday | 75°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 to 15 mph SE | 94% |
| Saturday Night | 62°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 80% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 10 to 15 mph NNE | 74% |
| Sunday Night | 56°F | Chance Rain Showers | 15 mph NE | 46% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 41% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph ENE | 35% |
| Tuesday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 18% |
| Wednesday | 64°F | Partly Sunny | 5 to 10 mph NE | 12% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 mph NNE | 4% |
| Thursday | 67°F | Partly Sunny | 5 mph NNE | 6% |
| Thursday Night | 53°F | Mostly Cloudy | 0 to 5 mph NNE | 5% |
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
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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 Sep 19, 2026.