As of 5:07 PM CDT on May 17, 2026, out of 12 cities in Custer County, NE in our database, 11 cities (92%) have a UV Index reading of Moderate, while 1 city (8%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Mason City, NE with a reading of 3.6.
Over the next 24 hours, the highest UV Index reading in Custer County, NE is expected to be 3.6 in Mason City between 5:00 PM - 6:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |