Castleton-on-Hudson, NY: Current UV Index and Hourly Forecast

On this page, you can find the current UV Index and hourly 5 day UV Index forecast for Castleton-on-Hudson, Rensselaer County, New York (NY). The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated daily.

Current UV Index
2:01 PM EDT

4.6Risk: Moderate

(Updated 1 minutes ago.)

As of 2:01 PM EDT, the UV Index in Castleton-on-Hudson, NY is 4.6 (Moderate).
The UV Index is expected to fall sharply to 1.9 (Low) between 3:00 PM - 4:00 PM EDT today.

Hourly UV Index Forecast for Today
Sunday, September 7, 2025

12 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PMEastern Daylight Time (EDT)0123456789101112Current Time: 2:01 PM, EDT

UV Index Data sourced from the NOAA.


As of 2:01 PM EDT today in Castleton-on-Hudson, NY, 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.

The UV Index will return to low levels of 1.9 at 3:00 PM. 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 Castleton-on-Hudson, NY

Today

Time RangeUV IndexRisk
12:00 AM - 11:00 AM (EDT)0 - 2.1
Low
11:00 AM - 1:00 PM4 - 5.1
Moderate
1:00 PM - 2:00 PM5.6
High
2:00 PM - 3:00 PM4.6
Moderate
3:00 PM - 12:00 AM0 - 1.9
Low

Tomorrow

Time RangeUV IndexRisk
12:00 AM - 10:00 AM (EDT)0 - 1.5
Low
10:00 AM - 12:00 PM3 - 4.7
Moderate
12:00 PM - 3:00 PM5.8 - 6.4
High
3:00 PM - 5:00 PM2.8 - 4.4
Moderate
5:00 PM - 12:00 AM0 - 1.3
Low

Detailed Hourly Castleton-on-Hudson UV Index Forecast for the next 5 days

Download CSV (Excel) ↓
TimeUV IndexRisk
2:00 PM - 3:00 PM (Now, EDT)4.6
Moderate
3:00 PM - 4:00 PM 1.9
Low
4:00 PM - 5:00 PM 1.7
Low
5:00 PM - 6:00 PM 1
Low
6:00 PM - 7:00 PM 0.3
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

Current UV Index in Nearby Cities