Marriott-Slaterville, UT: Current UV Index and Hourly Forecast

On this page, you can find the current UV Index and hourly 5 day UV Index forecast for Marriott-Slaterville, Weber County, Utah (UT). The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated daily.

Current UV Index
4:02 PM MDT

4.6Risk: Moderate

(Updated 2 minutes ago.)

As of 4:02 PM MDT, the UV Index in Marriott-Slaterville, UT is 4.6 (Moderate).
The UV Index is expected to fall sharply to 2.8 (still Moderate) between 5:00 PM - 6:00 PM MDT today.

Hourly UV Index Forecast for Today
Wednesday, May 20, 2026

7 AM10 AM1 PM4 PM7 PM10 PMMountain Daylight Time (MDT)0123456789101112Current Time: 4:02 PM, MDT

UV Index Data sourced from the NOAA.


As of 4:02 PM MDT today in Marriott-Slaterville, UT, the UV Index is currently at a moderate level of 4.6. As the day progresses, the UV index is expected to fall as the sun sets.

It will return to moderate levels at 5:00 PM and then drop to low levels again from 6:00 PM onwards. As the day transitions into the night, the UV Index will drop back down to 0 at 9:00 PM.


Summary of Hourly UV Index Forecast for Today and Tomorrow in Marriott-Slaterville, UT

Today

Time RangeUV IndexRisk
7:00 AM - 10:00 AM (MDT)0.2 - 1.7
Low
10:00 AM - 12:00 PM3.4 - 5.3
Moderate
12:00 PM - 1:00 PM6.9
High
1:00 PM - 3:00 PM7.9
Very High
3:00 PM - 4:00 PM6.8
High
4:00 PM - 6:00 PM2.8 - 4.6
Moderate
6:00 PM - 12:00 AM0 - 1.6
Low

Tomorrow

Time RangeUV IndexRisk
12:00 AM - 11:00 AM (MDT)0 - 2.2
Low
11:00 AM - 12:00 PM3.2
Moderate
12:00 PM - 1:00 PM6.8
High
1:00 PM - 2:00 PM7.6
Very High
2:00 PM - 3:00 PM6.4
High
3:00 PM - 5:00 PM4 - 5.1
Moderate
5:00 PM - 12:00 AM0 - 2.4
Low

Detailed Hourly Marriott-Slaterville UV Index Forecast for the next 5 days

Download CSV (Excel) ↓
TimeUV IndexRisk
4:00 PM - 5:00 PM (Now, MDT)4.6
Moderate
5:00 PM - 6:00 PM 2.8
Moderate
6:00 PM - 7:00 PM 1.6
Low
7:00 PM - 8:00 PM 0.7
Low
8:00 PM - 9:00 PM 0.2
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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