Top-of-the-World, AZ: Current UV Index and Hourly Forecast

On this page, you can find the current UV Index and hourly 5 day UV Index forecast for Top-of-the-World, Pinal County, Arizona (AZ). The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated daily.

Current UV Index
3:57 PM MST

6.9Risk: High

(Updated 57 minutes ago.)

As of 3:57 PM MST, the UV Index in Top-of-the-World, AZ is 6.9 (High).
The UV Index is expected to fall sharply to 4.3 (Moderate) between 4:00 PM - 5:00 PM MST today.

Hourly UV Index Forecast for Today
Thursday, July 17, 2025

6 AM9 AM12 PM3 PM6 PM9 PMMountain Standard Time (MST)0123456789101112Current Time: 3:57 PM, MST

UV Index Data sourced from the NOAA.


As of 3:57 PM MST today in Top-of-the-World, AZ, the UV Index is currently at a high level of 6.9. As the day progresses, the UV index is expected to fall as the sun sets.

It will return to moderate levels at 4:00 PM and then drop to low levels again from 5:00 PM onwards. As the day transitions into the night, the UV Index will drop back down to 0 at 7:00 PM.


Summary of Hourly UV Index Forecast for Today and Tomorrow in Top-of-the-World, AZ

Today

Time RangeUV IndexRisk
6:00 AM - 9:00 AM (MST)0.2 - 2.3
Low
9:00 AM - 10:00 AM4.8
Moderate
10:00 AM - 12:00 PM7.5 - 9.9
Very High
12:00 PM - 2:00 PM10.9 - 11.2
Extreme
2:00 PM - 3:00 PM9.4
Very High
3:00 PM - 4:00 PM6.9
High
4:00 PM - 5:00 PM4.3
Moderate
5:00 PM - 12:00 AM0 - 1.3
Low

Tomorrow

Time RangeUV IndexRisk
12:00 AM - 9:00 AM (MST)0 - 2.4
Low
9:00 AM - 10:00 AM4.9
Moderate
10:00 AM - 12:00 PM7.8 - 10.4
Very High
12:00 PM - 2:00 PM11.7 - 11.8
Extreme
2:00 PM - 3:00 PM10
Very High
3:00 PM - 4:00 PM7.3
High
4:00 PM - 5:00 PM4.4
Moderate
5:00 PM - 12:00 AM0 - 2
Low

Detailed Hourly Top-of-the-World UV Index Forecast for the next 5 days

Download CSV (Excel) ↓
TimeUV IndexRisk
3:00 PM - 4:00 PM (Now, MST)6.9
High
4:00 PM - 5:00 PM 4.3
Moderate
5:00 PM - 6:00 PM 1.3
Low
6:00 PM - 7:00 PM 0.2
Low
7:00 PM - 8:00 PM 0
Low
8:00 PM - 9:00 PM 0
Low
9:00 PM - 10:00 PM 0
Low
10:00 PM - 11:00 PM 0
Low
11:00 PM - 12:00 AM 0
Low

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