Frost dates · Illinois
When is the first frost in Rockford?
Rockford right now
35°FClear skies
- Today42°F / 34°FClear skies
- Tomorrow47°F / 30°FClear skies
- Monday48°F / 29°FClear skies
Today's forecast: sigh.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical year, Rockford’s first frost comes around October 17 and its last around April 24.
One year in ten the first frost comes as early as October 2, and nine years in ten it has arrived by October 30. One year in ten the last frost is over as early as April 10, and nine years in ten it is over by May 8. Rockford averages about 136 nights a year at 32°F or colder, with about 174 frost-free days in between in a typical year. It’s frost season here, and the last frost usually comes around April 24. That makes it the 33rd earliest first frost of the 117 cities we track where it freezes most years.
Last updated
A freeze is in the forecast for the next 48 hours.
Rockford gets frost from mid-October to late April, and spring arrives looking like it took the scenic route.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | October 2 | October 17 | October 30 |
| Last frost | April 10 | April 24 | May 8 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Youngstown, Ohio: first frost around October 17
- Grand Junction, Colorado: first frost around October 16
- Hartford, Connecticut: first frost around October 16
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00094822.