2.4 (Low)
Last Updated 21 minutes ago
The hourly Helena Valley Northwest, MT UV Index forecast for Monday, September 15th, 2025.
Last Updated 4 hours ago
The UV index forecast for the next five days in Helena Valley Northwest, MT has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Helena Valley Northwest over the next five days will be 6.2 on Thursday, September 18th at 1:00 pm.
The UV index forecast for Monday, September 15th in Helena Valley Northwest, MT is below.
| Time | UV Index | Risk |
|---|---|---|
| 5pm | 0.9 |
Low |
| 6pm | 0.6 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, September 16th in Helena Valley Northwest, 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 |
Low |
| 9am | 0.2 |
Low |
| 10am | 0.8 |
Low |
| 11am | 1.9 |
Low |
| 12pm | 1.8 |
Low |
| 1pm | 2 |
Low |
| 2pm | 3 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 2.6 |
Low |
| 5pm | 1.8 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 17th in Helena Valley Northwest, 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 | 1.8 |
Low |
| 11am | 3.4 |
Moderate |
| 12pm | 4.9 |
Moderate |
| 1pm | 5.9 |
Moderate |
| 2pm | 6 |
High |
| 3pm | 5 |
Moderate |
| 4pm | 3.5 |
Moderate |
| 5pm | 1.9 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, September 18th in Helena Valley Northwest, 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 | 1.9 |
Low |
| 11am | 3.6 |
Moderate |
| 12pm | 5.2 |
Moderate |
| 1pm | 6.2 |
High |
| 2pm | 6.2 |
High |
| 3pm | 5.2 |
Moderate |
| 4pm | 3.6 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0.1 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, September 19th in Helena Valley Northwest, 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 |