Rockford, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rockford, a city in Winnebago County, Illinois.
This Afternoon
71°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy, with a high near 71. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rockford
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Slight Chance Rain Showers | 15 mph E | 22% |
| Tonight | 62°F | Slight Chance Rain Showers then Showers And Thunderstorms Likely | 10 mph ESE | 67% |
| Saturday | 76°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 92% |
| Saturday Night | 62°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 76% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 70% |
| Sunday Night | 55°F | Chance Rain Showers | 15 mph NE | 48% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 41% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 10% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 67°F | Partly Sunny | 0 to 5 mph NNE | 4% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Rockford (42.259, -89.065). Updated through the day.
Growing snapshot for Rockford
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for Rockford: nearby ZIP 61104 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cherry Valley
Durand
Loves Park
Machesney Park
New Milford
Pecatonica
Rockton
Roscoe
South Beloit
Westlake Village
Winnebago
Climate data from the nearest NOAA station, Rockford Gtr Rockford Ap, Il (4.1 mi from Rockford). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.