Roscoe, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roscoe, a village in Winnebago County, Illinois.
This Afternoon
70°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 70. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Roscoe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Chance Rain Showers | 15 mph E | 40% |
| Tonight | 60°F | Showers And Thunderstorms Likely | 10 mph ESE | 79% |
| Saturday | 75°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 mph ESE | 95% |
| Saturday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 74% |
| Sunday | 66°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 63% |
| Sunday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 38% |
| Monday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Tuesday Night | 46°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 10 mph NE | 2% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph NNE | 5% |
| Thursday Night | 49°F | Mostly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Roscoe (42.426, -89.009). Updated through the day.
Growing snapshot for Roscoe
Last spring frost
May 1
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
5b
More local growing data for Roscoe: nearby ZIP 61073 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cherry Valley
Durand
Loves Park
Machesney Park
New Milford
Pecatonica
Rockford
Rockton
South Beloit
Westlake Village
Winnebago
Climate data from the nearest NOAA station, Beloit, Wi (5.9 mi from Roscoe). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.