UV Index for Katy, TX

Current Katy UV Index

0.8 (Low)

Last Updated 50 minutes ago

Hourly Katy UV Index

The hourly Katy, TX UV Index forecast for Sunday, January 18th, 2026.

5 Day Hourly Katy UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Katy, TX has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Katy over the next five days will be 4.2 on Monday, January 19th at 12:00 pm.

The UV index forecast for Sunday, January 18th in Katy, TX is below.

Time UV Index Risk
5pm 0.2
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, January 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
Low
8am 0.2
Low
9am 1
Low
10am 2.2
Low
11am 3.4
Moderate
12pm 4.2
Moderate
1pm 4.2
Moderate
2pm 3.2
Moderate
3pm 2
Low
4pm 0.8
Low
5pm 0.2
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, January 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 0.2
Low
9am 0.5
Low
10am 1.2
Low
11am 2
Low
12pm 3.1
Moderate
1pm 3.2
Moderate
2pm 2.6
Low
3pm 1.3
Low
4pm 0.5
Low
5pm 0.1
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, January 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
8am 0.2
Low
9am 0.4
Low
10am 0.4
Low
11am 0.5
Low
12pm 0.5
Low
1pm 0.4
Low
2pm 0.3
Low
3pm 0.4
Low
4pm 0.1
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, January 22nd 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