I-55 Missouri Road Conditions

I-55 crosses 210 miles of Missouri, between the Arkansas line and the Illinois line. That is 22% of I-55's 964 miles.

Inside Missouri it meets I-44 and I-64 at Saint Louis.

By mile marker, I-55 passes Sikeston 67 · Saint Louis 209.

No full closures are reported on I-55 in Missouri as of Oct 8, 2026 9:03 PM CDT, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.

Winter reporting is off for the season. Iowa DOT's Winter Road Conditions – Midwest Region feed, which carries Missouri DOT's segment-by-segment snow and ice conditions, runs from October 15 to April 15; outside that window it changes only as needed. Our own forecast below runs year-round.

Conditions are entered by Missouri DOT maintenance staff and describe what is on the pavement, not the forecast. They reach this page through Iowa DOT's Winter Road Conditions – Midwest Region feed, published for reference; the authoritative report is MoDOT Traveler. Always check with MoDOT Traveler before setting off.

Source: Missouri DOT, via Iowa DOT's Midwest Region layer, CC BY 4.0.

NOAA 1991–2020 Climate Normals, from a weather station in Missouri. A dash is a figure that station does not report, not a zero.

Towns Along I-55 in Missouri

From Steele to St. Louis, with the position of each town measured along this stretch itself — counted from the Steele end, not from a state milepost, so it will not match the numbers on the signs.

1. 3 mi Steele 2.9 mi off the road
2. 33 mi Portageville
3. 60 mi Sikeston 3.0 mi off the road
4. 110 mi Jackson 2.0 mi off the road
5. 149 mi Ste. Genevieve 4.3 mi off the road
6. 179 mi Herculaneum
7. 191 mi Arnold
8. 198 mi Crestwood 3.7 mi off the road
9. 198 mi Lakeshire 1.5 mi off the road
10. 200 mi Shrewsbury 3.4 mi off the road
11. 208 mi St. Louis 2.5 mi off the road

Places from the US Census Gazetteer and population estimates, both public domain; distances measured along this page's own route geometry.

Related Roads

I-55 in Missouri Road Weather FAQ

Is Interstate 55 in Missouri closed right now?

No full closures are reported on I-55 in Missouri. No lane closures or roadworks are reported either.

What are I-55 in Missouri road conditions today?

The map on this page colors the route along I-55 in Missouri by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Oct 8, 2026 9:03 PM CDT. Right now temperatures run from 65°F to 75°F and the strongest wind is 7 mph.

Where are Missouri road closures reported officially?

Missouri's official traveler information service is MoDOT Traveler, at traveler.modot.org, and it is where closures and restrictions are reported.

How often does Missouri DOT update winter road conditions?

Missouri DOT reports the winter condition of each stretch of state highway through Iowa DOT's Winter Road Conditions – Midwest Region feed, which runs from October 15 to April 15 and refreshes every 10 minutes. The conditions are entered by maintenance staff and describe what is on the pavement, not a forecast; this page shows the current report for I-55 in Missouri beside our own road-surface forecast.

Are there live traffic cameras on I-55 in Missouri?

Yes. This page shows 2 live views on I-55 in Missouri from the state transportation departments' own camera feeds, further down the page, refreshed each time you load it.

How often are I-55 in Missouri 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.