I-39 Road Conditions & Weather

Measured state by state, I-39 runs 321 miles south to north from Normal, Illinois to Rothschild, Wisconsin, crossing 2 states. Its longest stretch is 181 miles across Wisconsin; its shortest is 140 miles in Illinois.

Mile markers count from each state's southern line and start again at the next one, which is how most states number their exits as well. They are measured along the same road geometry these pages draw, so they land within a mile or two of the posted markers. A toll road that runs its own continuous numbering is the exception — on the New York Thruway the posts continue from New York City — and there the figure is how far into the state the place is rather than the number on the sign. Distances are measured state by state, never across a gap.

7 current reports along the route. Always check with the responsible state DOT before setting off.

• Lanes blocked

  Mainline Various Lanes Closed on I-39 NB from OFF RAMP TO WIS 60 to ON RAMP FROM COUNTY CS. Weekly from 09/13/2026 to…

  Mainline Various Lanes Closed on I-39 NB from OFF RAMP TO WIS 60 to ON RAMP FROM COUNTY CS. Weekly from 09/13/2026 to 12/18/2026, 10:00 PM Sun - 08:00 AM Fri

  I-39 NB • northbound • WI • Until Oct 9, 1:00 PM

• Lanes blocked

  Lasalle-All Ramps At Int80/Int39

  LASALLE • IL • Until Nov 30, 12:00 PM

• Lanes blocked

  Mainline Various Lanes Closed on I-39 SB from BLACK RD (BRIDGE CROSSING) to ON RAMP FROM WIS 60. Weekly from 09/13/2026…

  Mainline Various Lanes Closed on I-39 SB from BLACK RD (BRIDGE CROSSING) to ON RAMP FROM WIS 60. Weekly from 09/13/2026 to 12/18/2026, 10:00 PM Sun - 08:00 AM Fri

  I-39 SB • southbound • WI • Until Oct 9, 1:00 PM

• Lanes blocked

  Mainline Various Lanes Closed on I-39 NB from OFF RAMP TO WIS 60 to ON RAMP FROM COUNTY CS. Daily from 09/17/2026 to…

  Mainline Various Lanes Closed on I-39 NB from OFF RAMP TO WIS 60 to ON RAMP FROM COUNTY CS. Daily from 09/17/2026 to 12/17/2026, 09:00 PM - 11:59 PM, Th (excluding Sun, M, T, W, F, Sat)

  I-39 NB • northbound • WI • Until Oct 9, 4:59 AM

• Lanes blocked

  Mainline Various Lanes Closed on I-39 SB from BLACK RD (BRIDGE CROSSING) to ON RAMP FROM WIS 60. Daily from 09/17/2026…

  Mainline Various Lanes Closed on I-39 SB from BLACK RD (BRIDGE CROSSING) to ON RAMP FROM WIS 60. Daily from 09/17/2026 to 12/17/2026, 09:00 PM - 11:59 PM, Th (excluding Sun, M, T, W, F, Sat)

  I-39 SB • southbound • WI • Until Oct 9, 4:59 AM

• Lanes blocked

  Mainline Right Lane Closed on I-39 SB from OFF RAMP TO COUNTY J/E to FAWN AVE (BRIDGE CROSSING)

  I-39 SB • southbound • WI • Until Oct 14, 11:00 AM

• Lanes blocked

  Ramp Full Closure on I-39 SB at ON RAMP FROM COUNTY J/E. Detour: Detour will utilize NB IH 39 to STH 21 exit ramp to IH…

  Ramp Full Closure on I-39 SB at ON RAMP FROM COUNTY J/E. Detour: Detour will utilize NB IH 39 to STH 21 exit ramp to IH 39 SB entrance ramp.

  I-39 SB • southbound • WI • Until Oct 14, 11:00 AM

Winter reporting is off for the season. The state DOT feeds this page reads for Illinois and Wisconsin run from October 15 to April 15; outside that window they change only as needed. Our own forecast below runs year-round.

Reports for Illinois and Wisconsin come from each state's DOT, entered by maintenance staff and describing what is on the pavement, not the forecast; the state pages carry each DOT's terms and notices. Always check with the responsible state DOT before setting off.

Source: Iowa DOT's winter road condition layers (Iowa, and the Midwest Region layer for the other states), CC BY 4.0.

Related Roads

I-39 Road Weather FAQ

Is I-39 closed right now?

No full closures are reported on I-39 as of Oct 8, 2026 10:17 PM CDT. 7 lane closures, roadworks or restrictions are in force. They are listed under closures and road blocks on this page.

What are I-39 road conditions today?

The map on this page colors the route along I-39 by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Oct 8, 2026 8:33 PM CDT. Right now temperatures run from 53°F to 66°F and the strongest wind is 5 mph.

How long is Interstate 39, and which states does it cross?

Measured state by state, I-39 runs 321 miles south to north, from Normal, Illinois to Rothschild, Wisconsin, through 2 states: Illinois and Wisconsin. The longest stretch is 181 miles across Wisconsin. Mile markers restart at each state line, so Rockford is around mile 119 in Illinois.

Are there live traffic cameras on I-39?

Yes. This page shows 6 live views on I-39 from the state transportation departments' own camera feeds, further down the page, refreshed each time you load it.

How often are I-39 road conditions updated?

The road surface and weather layers are rebuilt whenever this page is opened with data more than ten minutes old, and refreshed on a schedule in between, so nothing here is more than about two hours old even on a road nobody has looked at. Closures and road blocks are re-imported from the state 511 feeds every fifteen minutes, and the written state-by-state summaries are refreshed daily. Every section on this page carries the time its data was fetched.