Winter temperatures · Illinois
How cold does Rockford get in winter?
In a typical winter, December to February, Rockford averages highs around 32°F and lows around 18°F.
About 50 days a year never get above freezing. About 30 nights a year drop to 10°F or colder, and about 12 go below zero. That makes it the 15th coldest winter of the 129 US cities we track.
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The coldest low in the forecast for the next 48 hours is about 29°F.
Rockford spends about 50 days a year below freezing all day, which is a long time to keep Illinois this quiet.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
More about the weather here
Winter at a glance
| Average winter high | 32°F |
|---|---|
| Average winter low | 18°F |
| Days a year that stay below freezing | 50 |
| Nights a year at 32°F or colder | 136 |
| Nights a year at 10°F or colder | 30 |
| Nights a year below zero | 12 |
| Average summer high, for comparison | 82°F |
Winter here is December to February. Counts are averages a year.
Cities with about the same winter
- Binghamton, New York: highs around 32°F, lows around 18°F
- Concord, New Hampshire: highs around 35°F, lows around 16°F
- Helena, Montana: highs around 34°F, lows around 15°F
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00094822.