UV Index for Fort Lewis, WA

Current Fort Lewis UV Index

1.5 (Low)

Last Updated 13 minutes ago

Hourly Fort Lewis UV Index

The hourly Fort Lewis, WA UV Index forecast for Thursday, September 18th, 2025.

5 Day Hourly Fort Lewis UV Index Forecast

Last Updated 23 hours ago

The UV index forecast for the next five days in Fort Lewis, WA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Fort Lewis over the next five days will be 5.1 on Friday, September 19th at 1:00 pm.

The UV index forecast for Thursday, September 18th in Fort Lewis, WA is below.

Time UV Index Risk
11am 3
Moderate
12pm 4.2
Moderate
1pm 4.6
Moderate
2pm 4.4
Moderate
3pm 3.7
Moderate
4pm 2.4
Low
5pm 1.2
Low
6pm 0.4
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 Fort Lewis, 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 0.2
Low
9am 0.8
Low
10am 1.9
Low
11am 3.3
Moderate
12pm 4.5
Moderate
1pm 5.1
Moderate
2pm 4.9
Moderate
3pm 3.7
Moderate
4pm 2.4
Low
5pm 1.2
Low
6pm 0.4
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 Fort Lewis, 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 0.2
Low
9am 0.8
Low
10am 1.6
Low
11am 2.5
Low
12pm 3.3
Moderate
1pm 3.8
Moderate
2pm 3.8
Moderate
3pm 3.2
Moderate
4pm 0.6
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 Sunday, September 21st in Fort Lewis, 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