As of 2:22 PM EDT on May 23, 2026, out of 8 cities in St. Joseph County, MI in our database, 5 cities (63%) have a UV Index reading of Low, while 3 cities (38%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Constantine, MI with a reading of 3.
Over the next 24 hours, the highest UV Index reading in St. Joseph County, MI is expected to be 3 in Constantine between 2:00 PM - 3:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |