UV Index for New Castle, CO

Current New Castle UV Index

0 (Low)

Last Updated 36 minutes ago

Hourly New Castle UV Index

The hourly New Castle, CO UV Index forecast for Thursday, September 18th, 2025.

5 Day Hourly New Castle UV Index Forecast

Last Updated 7 hours ago

The UV index forecast for the next five days in New Castle, CO has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in New Castle over the next five days will be 8.1 on Thursday, September 18th at 1:00 pm.

The UV index forecast for Thursday, September 18th in New Castle, CO is below.

Time UV Index Risk
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, September 19th in New Castle, CO 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 1.2
Low
10am 2.6
Low
11am 4.7
Moderate
12pm 5.8
Moderate
1pm 4.4
Moderate
2pm 6.2
High
3pm 5
Moderate
4pm 3.4
Moderate
5pm 1.5
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 Saturday, September 20th in New Castle, CO 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 0.2
Low
9am 0.8
Low
10am 2
Low
11am 3.8
Moderate
12pm 5.7
Moderate
1pm 7.8
High
2pm 7.2
High
3pm 5.8
Moderate
4pm 3.4
Moderate
5pm 1.8
Low
6pm 0.5
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 New Castle, CO 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 0.2
Low
9am 1
Low
10am 2.6
Low
11am 4.6
Moderate
12pm 6.6
High
1pm 7.3
High
2pm 3.2
Moderate
3pm 2
Low
4pm 2.6
Low
5pm 1.4
Low
6pm 0.5
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 22nd in New Castle, CO 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