UV Index for Honolulu, HI

Current Honolulu UV Index

0 (Low)

Last Updated 22 minutes ago

Hourly Honolulu UV Index

The hourly Honolulu, HI UV Index forecast for Thursday, September 18th, 2025.

5 Day Hourly Honolulu UV Index Forecast

Last Updated 20 hours ago

The UV index forecast for the next five days in Honolulu, HI has 2 days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Honolulu over the next five days will be 11.2 on Thursday, September 18th at 12:00 pm.

The UV index forecast for Thursday, September 18th in Honolulu, HI is below.

Time UV Index Risk
5am 0
Low
6am 0
Low
7am 0.2
Low
8am 1.1
Low
9am 3.2
Moderate
10am 6.2
High
11am 9.3
Very High
12pm 11.2
Extreme
1pm 11.2
Extreme
2pm 9.4
Very High
3pm 6.5
High
4pm 3.4
Moderate
5pm 1.2
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, September 19th in Honolulu, HI 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 0.2
Low
8am 1.1
Low
9am 3.2
Moderate
10am 6.2
High
11am 9.3
Very High
12pm 11.2
Extreme
1pm 11.2
Extreme
2pm 9.4
Very High
3pm 6.4
High
4pm 3.4
Moderate
5pm 1.2
Low
6pm 0.2
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 Honolulu, HI 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 0.2
Low
8am 1
Low
9am 3.1
Moderate
10am 6.1
High
11am 9
Very High
12pm 10.8
Very High
1pm 10.9
Very High
2pm 9.2
Very High
3pm 6.1
High
4pm 3.2
Moderate
5pm 1.1
Low
6pm 0.2
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 Honolulu, HI is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
View Historical UV Index Data