UV Index for Johnston, SC

Current Johnston UV Index

0 (Low)

Last Updated 35 minutes ago

Hourly Johnston UV Index

The hourly Johnston, SC UV Index forecast for Monday, December 22nd, 2025.

5 Day Hourly Johnston UV Index Forecast

Last Updated 16 hours ago

The UV index forecast for the next five days in Johnston, SC has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Johnston over the next five days will be 3.3 on Tuesday, December 23rd at 12:00 pm.

The UV index forecast for Monday, December 22nd in Johnston, SC is below.

Time UV Index Risk
6am 0
Low
7am 0
Low
8am 0
Low
9am 0.6
Low
10am 1.4
Low
11am 2.5
Low
12pm 3.2
Moderate
1pm 3.2
Moderate
2pm 2.4
Low
3pm 1.4
Low
4pm 0.6
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 Tuesday, December 23rd 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
Low
8am 0
Low
9am 0.3
Low
10am 0.4
Low
11am 0.8
Low
12pm 3.3
Moderate
1pm 3.3
Moderate
2pm 2.6
Low
3pm 1.5
Low
4pm 0.6
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 Wednesday, December 24th 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
Low
8am 0
Low
9am 0.6
Low
10am 1.5
Low
11am 2.5
Low
12pm 3.2
Moderate
1pm 3.2
Moderate
2pm 2.4
Low
3pm 1.4
Low
4pm 0.5
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 Thursday, December 25th 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
Low