UV Index for Katy, TX

Current Katy UV Index

0 (Low)

Last Updated 8 minutes ago

Hourly Katy UV Index

The hourly Katy, TX UV Index forecast for Thursday, July 17th, 2025.

5 Day Hourly Katy UV Index Forecast

Last Updated 7 hours ago

The UV index forecast for the next five days in Katy, TX has 2 days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Katy over the next five days will be 11.4 on Sunday, July 20th at 1:00 pm.

The UV index forecast for Thursday, July 17th in Katy, TX is below.

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

The UV index forecast for Friday, July 18th in Katy, 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 0.3
Low
9am 0.7
Low
10am 0.8
Low
11am 1.3
Low
12pm 2.1
Low
1pm 4
Moderate
2pm 7.2
High
3pm 9.2
Very High
4pm 7
High
5pm 3.8
Moderate
6pm 1.2
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, July 19th in Katy, 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 0.1
Low
8am 0.7
Low
9am 2.2
Low
10am 4.7
Moderate
11am 7.4
High
12pm 9.8
Very High
1pm 11.2
Extreme
2pm 11.2
Extreme
3pm 9.5
Very High
4pm 6.8
High
5pm 4
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 Sunday, July 20th in Katy, 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 0.6
Low
9am 1.9
Low
10am 4
Moderate
11am 7
High
12pm 9.8
Very High
1pm 11.4
Extreme
2pm 11.1
Extreme
3pm 8.8
Very High
4pm 6
High
5pm 3.9
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 Katy, 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