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Radar, DOT cameras and live pavement conditions on the 140 miles of I-39 in Illinois — plus closures, road work and city-by-city weather across the state.
Updated Sep 10, 2026 7:18 PM CDT · Mostly dry
Lowest 73°F near Rockford, Illinois · Highest wind 6 mph near Rockford, Illinois
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I-39 runs 140 miles across Illinois. It passes Rockford.
Weather data from Sep 10, 2026 7:18 PM CDT
Dry
Official Illinois road conditions (gettingaroundillinois.com) ↗
I-39 crosses 140 miles of Illinois, from the Wisconsin line to its end in the state. That is 46% of I-39's 306 miles.
Inside Illinois it meets I-90 at Rockford, and I-80.
2 current reports along the route. Always check with the responsible state DOT before setting off.
| Place | Snow a year | Snow days | Freezing nights | Freeze–thaw days | First freeze | Last freeze | Days over 90°F |
|---|---|---|---|---|---|---|---|
| Rockford | 36.7" | 28.7 | 133.5 | 87.4 | Oct 11 | Apr 26 | 14.9 |
NOAA 1991–2020 Climate Normals, from a weather station in Illinois. A dash is a figure that station does not report, not a zero.
From Bloomington to South Beloit, with the position of each town measured along this stretch itself — counted from the Bloomington end, not from a state milepost, so it will not match the numbers on the signs.
Places from the US Census Gazetteer and population estimates, both public domain; distances measured along this page's own route geometry.
Summaries fetched Sep 10, 2026 7:02 AM CDT
44 minutes ago
41 minutes ago
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47 minutes ago
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The same live radar and road-surface data as this map, on your phone and on Apple CarPlay or Android Auto.
Weather Navigation carries the same radar and road-surface data on Apple CarPlay and Android Auto, with a weather-aware route planner, storm-cell tracking and radar that refreshes every two minutes over the US.