6.9 (High)
Last Updated 25 minutes ago
The hourly St. Johns, AZ UV Index forecast for Tuesday, September 16th, 2025.
Last Updated 3 hours ago
The UV index forecast for the next five days in St. Johns, AZ has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in St. Johns over the next five days will be 8.8 on Thursday, September 18th at 12:00 pm.
The UV index forecast for Tuesday, September 16th in St. Johns, AZ is below.
| Time | UV Index | Risk |
|---|---|---|
| 3pm | 4.6 |
Moderate |
| 4pm | 2.5 |
Low |
| 5pm | 0.9 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 17th in St. Johns, AZ is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.6 |
Low |
| 10am | 4.6 |
Moderate |
| 11am | 5.3 |
Moderate |
| 12pm | 6.8 |
High |
| 1pm | 8.2 |
Very High |
| 2pm | 7.3 |
High |
| 3pm | 4.8 |
Moderate |
| 4pm | 2.2 |
Low |
| 5pm | 0.8 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, September 18th in St. Johns, AZ is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.6 |
Low |
| 10am | 5 |
Moderate |
| 11am | 7.3 |
High |
| 12pm | 8.8 |
Very High |
| 1pm | 8.8 |
Very High |
| 2pm | 7.4 |
High |
| 3pm | 5.1 |
Moderate |
| 4pm | 2.7 |
Low |
| 5pm | 0.9 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, September 19th in St. Johns, AZ is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.6 |
Low |
| 10am | 5 |
Moderate |
| 11am | 3.9 |
Moderate |
| 12pm | 4.9 |
Moderate |
| 1pm | 8.8 |
Very High |
| 2pm | 7.2 |
High |
| 3pm | 4.8 |
Moderate |
| 4pm | 2.5 |
Low |
| 5pm | 0.9 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, September 20th in St. Johns, AZ is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |