Roscoe, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roscoe, a village in Winnebago County, Illinois.
Tonight
57°F
Rain Showers
Rain showers. Cloudy. Low around 57, with temperatures rising to around 60 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Roscoe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain Showers | 15 mph S | 83% |
| Wednesday | 60°F | Chance Rain Showers | 15 mph SSW | 49% |
| Wednesday Night | 45°F | Chance Rain Showers | 15 mph SW | 32% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph WSW | 62% |
| Thursday Night | 39°F | Chance Rain Showers | 5 to 10 mph NNW | 32% |
| Friday | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph N | 18% |
| Friday Night | 31°F | Partly Cloudy | 0 to 10 mph NNW | 2% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph WSW | 3% |
| Sunday | 58°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 16% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 4% |
| Monday | 61°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 61°F | Sunny | 5 to 10 mph WNW | 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 4, 2026.