Rosemont, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosemont, a village in Cook County, Illinois.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South southwest wind around 10 mph.
7-day forecast for Rosemont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 10 mph SSW | 1% |
| Tonight | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSW | 28% |
| Wednesday | 80°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph WSW | 71% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph WNW | 89% |
| Thursday | 78°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 67% |
| Thursday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 23% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SSE | 4% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph SSE | 8% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 20% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 20% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Monday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 45% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 48% |
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 Aug 4, 2026.