UV Index for Mercer Island, WA

Current Mercer Island UV Index

2.2 (Low)

Last Updated 20 minutes ago

Hourly Mercer Island UV Index

The hourly Mercer Island, WA UV Index forecast for Monday, June 23rd, 2025.

5 Day Hourly Mercer Island UV Index Forecast

Last Updated 22 hours ago

The UV index forecast for the next five days in Mercer Island, WA has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Mercer Island over the next five days will be 6.6 on Tuesday, June 24th at 1:00 pm.

The UV index forecast for Monday, June 23rd in Mercer Island, WA is below.

Time UV Index Risk
10am 3.4
Moderate
11am 4.6
Moderate
12pm 5.9
Moderate
1pm 6.4
High
2pm 6
High
3pm 5.3
Moderate
4pm 3.9
Moderate
5pm 2.4
Low
6pm 1.4
Low
7pm 0.6
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, June 24th in Mercer Island, WA 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 0.1
Low
7am 0.4
Low
8am 1.2
Low
9am 2.4
Low
10am 4
Moderate
11am 5.4
Moderate
12pm 6.4
High
1pm 6.6
High
2pm 6.5
High
3pm 5.2
Moderate
4pm 3.2
Moderate
5pm 1.2
Low
6pm 0.6
Low
7pm 0.4
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, June 25th in Mercer Island, WA 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 0.3
Low
9am 0.6
Low
10am 1.2
Low
11am 1.8
Low
12pm 3.8
Moderate
1pm 5
Moderate
2pm 5.4
Moderate
3pm 2.9
Low
4pm 1.6
Low
5pm 0.3
Low
6pm 0.3
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, June 26th in Mercer Island, WA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low