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UV Index for St. Johns, AZ

Current St. Johns UV Index

0 (Low)

Last Updated 51 minutes ago

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Hourly St. Johns UV Index

The hourly St. Johns, AZ UV Index forecast for Thursday, November 12th, 2026.

5 Day Hourly St. Johns UV Index Forecast

Last Updated 19 hours ago

The UV index forecast for the next five days in St. Johns, AZ has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in St. Johns over the next five days will be 4.5 on Thursday, November 12th at 12:00 pm.

The UV index forecast for Thursday, November 12th in St. Johns, AZ is below.

Time UV Index Risk
7am 0
Low
8am 0.2
Low
9am 0.9
Low
10am 2.2
Low
11am 3.6
Moderate
12pm 4.5
Moderate
1pm 4.5
Moderate
2pm 3.6
Moderate
3pm 2.2
Low
4pm 1
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 Friday, November 13th in St. Johns, AZ 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
Low
12pm 2
Low
1pm 2.2
Low
2pm 1.4
Low
3pm 1.3
Low
4pm 0.4
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 Saturday, November 14th in St. Johns, AZ 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 0.1
Low
9am 0.7
Low
10am 1.7
Low
11am 3
Moderate
12pm 3.7
Moderate
1pm 3.7
Moderate
2pm 2.9
Low
3pm 0.9
Low
4pm 0.4
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 Sunday, November 15th in St. Johns, AZ is below.

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