As of 10:50 AM PDT on September 18, 2026, out of 9 cities in Colusa County, CA in our database, 5 cities (56%) have a UV Index reading of Moderate, while 4 cities (44%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Arbuckle, CA with a reading of 2.5.
Over the next 24 hours, the highest UV Index reading in Colusa County, CA is expected to be 6.6 in Lodoga between 1:00 PM - 2:00 PM PDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |