UV Index for Johnston, SC

Current Johnston UV Index

0.2 (Low)

Last Updated 1 minute ago

Hourly Johnston UV Index

The hourly Johnston, SC UV Index forecast for Monday, June 30th, 2025.

5 Day Hourly Johnston UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Johnston, SC has 1 day reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Johnston over the next five days will be 11 on Thursday, July 3rd at 1:00 pm.

The UV index forecast for Monday, June 30th in Johnston, SC is below.

Time UV Index Risk
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 1st in Johnston, SC 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 0.8
Low
9am 2.2
Low
10am 4.4
Moderate
11am 7.1
High
12pm 9.2
Very High
1pm 9.9
Very High
2pm 8.2
Very High
3pm 4.8
Moderate
4pm 6
High
5pm 2
Low
6pm 1
Low
7pm 0.4
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, July 2nd in Johnston, SC 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 0.2
Low
9am 0.3
Low
10am 1.4
Low
11am 3.4
Moderate
12pm 7.5
High
1pm 10.5
Very High
2pm 10.8
Very High
3pm 9
Very High
4pm 6.8
High
5pm 4.1
Moderate
6pm 2.1
Low
7pm 0.7
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, July 3rd in Johnston, SC 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 0.8
Low
9am 2.2
Low
10am 4.6
Moderate
11am 7.3
High
12pm 9.7
Very High
1pm 11
Extreme
2pm 11
Extreme
3pm 9.6
Very High
4pm 6.6
High
5pm 2.5
Low
6pm 0.8
Low
7pm 0.3
Low
8pm 0.1
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, July 4th in Johnston, SC 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 0.8
Low