Challenge-Brownsville, CA: Current UV Index and Hourly Forecast

On this page, you can find the current UV Index and hourly 5 day UV Index forecast for Challenge-Brownsville, Yuba County, California (CA). 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 PDT

7.6Risk: Very High

(Updated 57 minutes ago.)

As of 3:57 PM PDT, the UV Index in Challenge-Brownsville, CA is 7.6 (Very High).
The UV Index is expected to fall sharply to 5.2 (Moderate) between 4:00 PM - 5:00 PM PDT today.

Hourly UV Index Forecast for Today
Friday, August 8, 2025

6 AM9 AM12 PM3 PM6 PM9 PMPacific Daylight Time (PDT)0123456789101112Current Time: 3:57 PM, PDT

UV Index Data sourced from the NOAA.


As of 3:57 PM PDT today in Challenge-Brownsville, CA, the UV Index is currently at a very high level of 7.6. 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 6:00 PM onwards. As the day transitions into the night, the UV Index will drop back down to 0 at 8:00 PM.


Summary of Hourly UV Index Forecast for Today and Tomorrow in Challenge-Brownsville, CA

Today

Time RangeUV IndexRisk
6:00 AM - 9:00 AM (PDT)0 - 1
Low
9:00 AM - 11:00 AM2.5 - 4.7
Moderate
11:00 AM - 12:00 PM7.1
High
12:00 PM - 4:00 PM7.6 - 9.8
Very High
4:00 PM - 6:00 PM2.9 - 5.2
Moderate
6:00 PM - 12:00 AM0 - 1.2
Low

Tomorrow

Time RangeUV IndexRisk
12:00 AM - 9:00 AM (PDT)0 - 1
Low
9:00 AM - 11:00 AM2.5 - 4.7
Moderate
11:00 AM - 12:00 PM7
High
12:00 PM - 3:00 PM8.4 - 9
Very High
3:00 PM - 4:00 PM7
High
4:00 PM - 6:00 PM2.7 - 5
Moderate
6:00 PM - 12:00 AM0 - 1.1
Low

Detailed Hourly Challenge-Brownsville UV Index Forecast for the next 5 days

Download CSV (Excel) ↓
TimeUV IndexRisk
3:00 PM - 4:00 PM (Now, PDT)7.6
Very High
4:00 PM - 5:00 PM 5.2
Moderate
5:00 PM - 6:00 PM 2.9
Moderate
6:00 PM - 7:00 PM 1.2
Low
7:00 PM - 8:00 PM 0.3
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

Current UV Index in Nearby Cities