UV Index for Alton, TX

Current Alton UV Index

4.4 (Moderate)

Last Updated 56 minutes ago

Hourly Alton UV Index

The hourly Alton, TX UV Index forecast for Friday, July 18th, 2025.

5 Day Hourly Alton UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Alton, TX has 4 days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Alton over the next five days will be 12.1 on Friday, July 18th at 2:00 pm.

The UV index forecast for Friday, July 18th in Alton, TX is below.

Time UV Index Risk
6pm 1.9
Low
7pm 0.5
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, July 19th in Alton, TX 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 0.5
Low
9am 1.8
Low
10am 4.2
Moderate
11am 7.2
High
12pm 10
Very High
1pm 11.8
Extreme
2pm 11.8
Extreme
3pm 10.2
Very High
4pm 7.5
High
5pm 4.4
Moderate
6pm 1.8
Low
7pm 0.6
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, July 20th in Alton, TX 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 0.5
Low
9am 1.8
Low
10am 4.1
Moderate
11am 7
High
12pm 9.8
Very High
1pm 11.6
Extreme
2pm 11.6
Extreme
3pm 9.8
Very High
4pm 7
High
5pm 4.1
Moderate
6pm 1.8
Low
7pm 0.5
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, July 21st in Alton, TX 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 0.5
Low
9am 1.8
Low
10am 4
Moderate
11am 6.9
High
12pm 9.7
Very High
1pm 11.6
Extreme
2pm 11.8
Extreme
3pm 10.2
Very High
4pm 7.5
High
5pm 4.4
Moderate
6pm 2
Low
7pm 0.6
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 22nd in Alton, TX 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