0 (Low)
Last Updated 16 minutes ago
The hourly Great Falls, MT UV Index forecast for Sunday, September 14th, 2025.
Last Updated 11 hours ago
The UV index forecast for the next five days in Great Falls, MT has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Great Falls over the next five days will be 5.2 on Wednesday, September 17th at 1:00 pm.
The UV index forecast for Sunday, September 14th in Great Falls, MT is below.
| Time | UV Index | Risk |
|---|
The UV index forecast for Monday, September 15th in Great Falls, MT 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 |
Low |
| 8am | 0.1 |
Low |
| 9am | 0.5 |
Low |
| 10am | 0.9 |
Low |
| 11am | 1.3 |
Low |
| 12pm | 1.2 |
Low |
| 1pm | 2.6 |
Low |
| 2pm | 3 |
Moderate |
| 3pm | 0.6 |
Low |
| 4pm | 0.3 |
Low |
| 5pm | 0.3 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, September 16th in Great Falls, MT 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 |
Low |
| 8am | 0.1 |
Low |
| 9am | 0.4 |
Low |
| 10am | 1.6 |
Low |
| 11am | 3 |
Moderate |
| 12pm | 4.2 |
Moderate |
| 1pm | 5 |
Moderate |
| 2pm | 4.9 |
Moderate |
| 3pm | 4.1 |
Moderate |
| 4pm | 2.8 |
Low |
| 5pm | 1.5 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0.1 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 17th in Great Falls, MT 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 |
Low |
| 8am | 0.2 |
Low |
| 9am | 0.7 |
Low |
| 10am | 1.7 |
Low |
| 11am | 3.1 |
Moderate |
| 12pm | 4.4 |
Moderate |
| 1pm | 5.2 |
Moderate |
| 2pm | 5.1 |
Moderate |
| 3pm | 4.3 |
Moderate |
| 4pm | 3 |
Moderate |
| 5pm | 1.6 |
Low |
| 6pm | 0.6 |
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 Great Falls, MT 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 |