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South Dakota Road Conditions
South Dakota 511 Road Conditions
Radar and live pavement conditions on I-29 and I-90 — plus closures, road work and city-by-city weather across South Dakota.
Updated Sep 15, 2026 2:40 AM UTC · Mostly dry, wet in places
Lowest 61°F near Watertown, South Dakota · Highest wind 16 mph near Rapid City, South Dakota
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South Dakota carries 664 miles of interstate: I-29 and I-90. Rapid City, Sioux Falls and Watertown sit on these routes.
- Interstate miles: 664 mi
- Interstates: I-29 and I-90
Weather data from Sep 15, 2026 2:40 AM UTC
61°F
73°F
16 mph
29.62-29.78 inHg
Conditions across South Dakota
South Dakota
Wet
- Rapid City 68°F · 10 mph wind · Dry
- Sioux Falls 64°F · 6 mph wind · Wet
- Watertown 64°F · 6 mph wind · gusting 16 mph · Damp
No full closures are reported in South Dakota as of Sep 15, 2026 2:40 AM UTC, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.
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.
| Place | Snow a year | Snow days | Freezing nights | Freeze–thaw days | First freeze | Last freeze | Days over 90°F |
|---|---|---|---|---|---|---|---|
| Sioux Falls | 44.5" | 32.4 | 164.3 | 99.2 | Sep 29 | May 3 | 13.8 |
| Rapid City | 49.3" | 33.1 | 141.1 | 99.1 | Oct 7 | May 2 | 17.9 |
| Aberdeen | 38.1" | 32.3 | 178.8 | 102.4 | Sep 23 | May 9 | 13 |
| Pierre | 31.9" | 26.3 | 160.1 | 104.7 | Oct 1 | May 2 | 36.5 |
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
Summaries fetched Sep 14, 2026 12:07 PM UTC
Rapid City, SD weather
- Current weather conditions in Rapid City, SD indicate a temperature of 61.5°F with high humidity at 96%
- The dewpoint is at 60.3°F, reflecting the moist air
- Winds are coming from the southeast at 8.9 MPH
- The atmospheric pressure is measured at 29.6 inHg
- Rain showers are currently affecting the area, contributing to a visibility of approximately 9.8 miles
- The probability of precipitation is high, suggesting that further rain could be expected.
Sioux Falls, SD weather
- Current weather conditions in Sioux Falls, SD indicate a high risk of lightning, with 63 lightning strikes reported within the past 5 minutes
- Additionally, there is a low risk of rain, with expected rainfall rates of 0.13 in/h within the next 5 minutes
- Thunderstorms are present, contributing to a temperature of 57°F and a humidity level of 92%
- Winds are blowing from the southeast at 16 mph with a visibility of 5.0 miles
- The atmospheric pressure is measured at 30.06 inHg
- No active alerts are currently issued for the area.
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 Sep 15, 2026 2:40 AM UTC. Right now temperatures run from 61°F to 73°F and the strongest wind is 16 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.org, and it is where closures and restrictions are reported.
- 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.
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