Roscoe, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roscoe, a village in Winnebago County, Illinois.
This Afternoon
60°F
Slight Chance Rain Showers
A slight chance of rain showers and a slight chance of drizzle. Cloudy. High near 60, with temperatures falling to around 54 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Roscoe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Slight Chance Rain Showers | 15 mph SW | 10% |
| Tonight | 44°F | Slight Chance Rain Showers then Slight Chance Rain | 10 to 15 mph SW | 16% |
| Thursday | 54°F | Rain Likely | 10 to 15 mph WNW | 61% |
| Thursday Night | 35°F | Mostly Cloudy | 10 mph N | 8% |
| Friday | 48°F | Mostly Sunny | 5 to 15 mph N | 0% |
| Friday Night | 27°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 0 to 10 mph WSW | 0% |
| Tuesday | 61°F | Sunny | 0 to 5 mph WNW | 1% |
| Tuesday Night | 35°F | Partly Cloudy | 0 to 5 mph NW | 1% |
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 Nov 5, 2026.