UV Index for SeaTac, WA

Current SeaTac UV Index

0 (Low)

Last Updated 36 minutes ago

Hourly SeaTac UV Index

The hourly SeaTac, WA UV Index forecast for Sunday, August 31st, 2025.

5 Day Hourly SeaTac UV Index Forecast

Last Updated 19 hours ago

The UV index forecast for the next five days in SeaTac, WA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in SeaTac over the next five days will be 4.8 on Sunday, August 31st at 1:00 pm.

The UV index forecast for Sunday, August 31st in SeaTac, WA is below.

Time UV Index Risk
7am 0
Low
8am 0.3
Low
9am 1
Low
10am 2
Low
11am 3.2
Moderate
12pm 4.3
Moderate
1pm 4.8
Moderate
2pm 4.5
Moderate
3pm 3.7
Moderate
4pm 2.4
Low
5pm 1.4
Low
6pm 0.4
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 1st in SeaTac, 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
Low
8am 0.4
Low
9am 0.9
Low
10am 2
Low
11am 3.4
Moderate
12pm 4.1
Moderate
1pm 4.5
Moderate
2pm 4.3
Moderate
3pm 3.6
Moderate
4pm 2.4
Low
5pm 1.2
Low
6pm 0.5
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, September 2nd in SeaTac, 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
Low
8am 0.4
Low
9am 0.9
Low
10am 2
Low
11am 3.2
Moderate
12pm 3.9
Moderate
1pm 4.4
Moderate
2pm 4.1
Moderate
3pm 3.6
Moderate
4pm 2.4
Low
5pm 1.2
Low
6pm 0.4
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 3rd in SeaTac, 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