As of 5:42 PM CDT on August 21, 2026, out of 10 cities in Marshall County, SD in our database, 8 cities (80%) have a UV Index reading of Moderate, while 2 cities (20%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Britton, SD with a reading of 2.5.
Over the next 24 hours, the highest UV Index reading in Marshall County, SD is expected to be 7.1 in Langford between 2:00 PM - 3:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |