As of 2:35 PM MDT on April 26, 2025, all 2 cities in Sweet Grass County, MT in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Greycliff, MT with a reading of 6.1.
Over the next 24 hours, the highest UV Index reading in Sweet Grass County, MT is expected to be 6.1 in Greycliff between 2:00 PM - 3:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |