South Dakota (SD) Road Conditions

No full closures are reported in South Dakota as of Oct 9, 2026 2:03 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.

South Dakota Winter Road Reporting

South Dakota DOT's winter road conditions reach this page through Iowa DOT's Winter Road Conditions – Midwest Region feed, which runs from October 15 to April 15 and refreshes every 10 minutes. That feed is published for reference; the authoritative report is SD511. Conditions are entered by maintenance staff and describe what is on the pavement, not the forecast. This page shows those reports next to our own road-surface forecast. Always check with SD511 before setting off.

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

Interstates Through South Dakota, Road by Road

Each stretch has its own live conditions, closures and cameras for the South Dakota miles only — the weather 500 miles away on the same interstate says nothing about this drive.

• I-29 South Dakota Road Conditions 253 mi
• I-90 South Dakota Road Conditions 413 mi

NOAA 1991–2020 Climate Normals, from 4 weather stations in South Dakota. A dash is a figure that station does not report, not a zero.

Snowfall across South Dakota is not one number: Pierre averages 31.9" a year and Rapid City averages 49.3".

Driving in South Dakota Month by Month

What the road normally throws at you, month by month, from NOAA's 1991–2020 normals for South Dakota's own stations. Each month names its dominant hazard and the place that measured it — this is what the month is usually like, not a forecast and not a restriction.

• January Snow 7.7 in of snow at Sioux Falls, 22.6 days that never thaw at Aberdeen
• February Snow 7.4 in of snow at Rapid City, 16.1 days that never thaw at Aberdeen
• March Snow 11.8 in of snow at Rapid City, 7.8 days that never thaw at Aberdeen
• April Snow 8.8 in of snow at Rapid City, 1.3 days that never thaw at Rapid City
• May Snow 2 in of snow at Rapid City
• June Quiet 7.5 wet days at Rapid City is the most the normals report
• July Heat 13.8 days above 90°F at Pierre
• August Heat 12.6 days above 90°F at Pierre
• September Quiet 5.1 wet days at Sioux Falls is the most the normals report
• October Freeze–thaw 14 nights that freeze and days that thaw at Aberdeen
• November Snow 7.4 in of snow at Sioux Falls, 8.7 days that never thaw at Aberdeen
• December Snow 8.2 in of snow at Sioux Falls, 19.9 days that never thaw at Aberdeen

Related Roads

South Dakota Road Weather FAQ

Are any roads closed in South Dakota right now?

No full closures are reported on the interstates in South Dakota. No lane closures or roadworks are reported either.

What are South Dakota road conditions today?

The map on this page colors the interstates across 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 2:03 AM UTC. Right now temperatures run from 55°F to 71°F and the strongest wind is 13 mph.

Which interstates run through South Dakota?

South Dakota has 2 through interstates on this site: I-29 and I-90 — about 664 miles of interstate across the state. Each has its own page for the South Dakota stretch.

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 South Dakota beside our own road-surface forecast.

How often are 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.