0 (Low)
Last Updated 49 minutes ago
The hourly Grand Coulee, WA UV Index forecast for Tuesday, September 16th, 2025.
Last Updated 12 hours ago
The UV index forecast for the next five days in Grand Coulee, WA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Grand Coulee over the next five days will be 5.6 on Wednesday, September 17th at 1:00 pm.
The UV index forecast for Tuesday, September 16th in Grand Coulee, WA is below.
| Time | UV Index | Risk |
|---|
The UV index forecast for Wednesday, September 17th in Grand Coulee, WA 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 | 0.4 |
Low |
| 9am | 1.2 |
Low |
| 10am | 2.5 |
Low |
| 11am | 4 |
Moderate |
| 12pm | 5.2 |
Moderate |
| 1pm | 5.6 |
Moderate |
| 2pm | 5.1 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 2.4 |
Low |
| 5pm | 1 |
Low |
| 6pm | 0.3 |
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 Grand Coulee, WA 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 | 0.4 |
Low |
| 9am | 1.2 |
Low |
| 10am | 2.4 |
Low |
| 11am | 3.9 |
Moderate |
| 12pm | 5 |
Moderate |
| 1pm | 5.4 |
Moderate |
| 2pm | 4.9 |
Moderate |
| 3pm | 3.7 |
Moderate |
| 4pm | 2.2 |
Low |
| 5pm | 1 |
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 Grand Coulee, WA 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 | 0.8 |
Low |
| 10am | 1.8 |
Low |
| 11am | 3.1 |
Moderate |
| 12pm | 4 |
Moderate |
| 1pm | 4.5 |
Moderate |
| 2pm | 4.2 |
Moderate |
| 3pm | 3 |
Moderate |
| 4pm | 1.8 |
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 Saturday, September 20th in Grand Coulee, WA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |