I-29 South Dakota Road Conditions

I-29 crosses 253 miles of South Dakota, between the Iowa line and the North Dakota line. That is 34% of I-29's 751 miles.

Inside South Dakota it meets I-90 at Sioux Falls.

By mile marker, I-29 passes Sioux Falls 80 · Watertown 178.

No full closures are reported on I-29 in South Dakota as of Oct 9, 2026 4:03 AM UTC, 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 South Dakota 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 South Dakota 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 SD511. Always check with SD511 before setting off.

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

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

Towns Along I-29 in South Dakota

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

1. 3 mi North Sioux City
2. 17 mi Elk Point
3. 47 mi Beresford
4. 71 mi Harrisburg 4.2 mi off the road
5. 73 mi Tea 1.3 mi off the road
6. 79 mi Sioux Falls 2.4 mi off the road
7. 87 mi Crooks 1.5 mi off the road
8. 94 mi Baltic 2.2 mi off the road
9. 130 mi Aurora 3.7 mi off the road
10. 132 mi Brookings 1.4 mi off the road
11. 232 mi Sisseton 2.8 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-29 in South Dakota Road Weather FAQ

Is Interstate 29 in South Dakota closed right now?

No full closures are reported on I-29 in South Dakota. No lane closures or roadworks are reported either.

What are I-29 in South Dakota road conditions today?

The map on this page colors the route along I-29 in South Dakota by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Oct 9, 2026 4:03 AM UTC. Right now temperatures run from 48°F to 69°F and the strongest wind is 10 mph.

Where are South Dakota road closures reported officially?

South Dakota's official traveler information service is SD511, at sd511.org, and it is where closures and restrictions are reported.

How often does South Dakota DOT update winter road conditions?

South Dakota 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-29 in South Dakota beside our own road-surface forecast.

How often are I-29 in South Dakota 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.