2.4 (Low)
Last Updated 57 minutes ago
The hourly Grand Rapids, WI UV Index forecast for Wednesday, September 17th, 2025.
Last Updated 3 hours ago
The UV index forecast for the next five days in Grand Rapids, WI has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Grand Rapids over the next five days will be 5.8 on Thursday, September 18th at 1:00 pm.
The UV index forecast for Wednesday, September 17th in Grand Rapids, WI is below.
| Time | UV Index | Risk |
|---|---|---|
| 5pm | 1.1 |
Low |
| 6pm | 0.4 |
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 Rapids, WI 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 | 0.3 |
Low |
| 9am | 1.1 |
Low |
| 10am | 2.5 |
Low |
| 11am | 4 |
Moderate |
| 12pm | 5.3 |
Moderate |
| 1pm | 5.8 |
Moderate |
| 2pm | 5.3 |
Moderate |
| 3pm | 4.1 |
Moderate |
| 4pm | 2.5 |
Low |
| 5pm | 1.2 |
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 Friday, September 19th in Grand Rapids, WI 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 | 0.3 |
Low |
| 9am | 1.1 |
Low |
| 10am | 2.4 |
Low |
| 11am | 3.7 |
Moderate |
| 12pm | 4.8 |
Moderate |
| 1pm | 5.2 |
Moderate |
| 2pm | 4.3 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 2.4 |
Low |
| 5pm | 0.6 |
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 Rapids, WI 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 | 0.3 |
Low |
| 9am | 0.9 |
Low |
| 10am | 1.8 |
Low |
| 11am | 2.8 |
Low |
| 12pm | 2.8 |
Low |
| 1pm | 1.7 |
Low |
| 2pm | 4 |
Moderate |
| 3pm | 2.4 |
Low |
| 4pm | 1 |
Low |
| 5pm | 0.6 |
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 Sunday, September 21st in Grand Rapids, WI 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 |