Rosemont, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosemont, a village in Cook County, Illinois.
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 72, with temperatures falling to around 70 in the afternoon. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
7-day forecast for Rosemont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 10 mph E | 30% |
| Tonight | 62°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 15 mph E | 52% |
| Saturday | 76°F | Showers And Thunderstorms Likely | 10 to 15 mph SSE | 87% |
| Saturday Night | 64°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 80% |
| Sunday | 68°F | Showers And Thunderstorms | 10 to 15 mph NNE | 80% |
| Sunday Night | 56°F | Rain Showers Likely | 15 mph NE | 55% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 47% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 31% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 22% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 20% |
| Wednesday | 65°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 7% |
| Thursday Night | 55°F | Mostly Cloudy | 5 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Rosemont (41.989, -87.872). Updated through the day.
Growing snapshot for Rosemont
Last spring frost
Apr 16
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
6a
More local growing data for Rosemont: nearby ZIP 60018 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chicago Ohare Intl Ap, Il (2.3 mi from Rosemont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.