UV Index for Johannesburg, CA

Current Johannesburg UV Index

0.5 (Low)

Last Updated 30 minutes ago

Hourly Johannesburg UV Index

The hourly Johannesburg, CA UV Index forecast for Wednesday, July 2nd, 2025.

5 Day Hourly Johannesburg UV Index Forecast

Last Updated 20 hours ago

The UV index forecast for the next five days in Johannesburg, CA has 2 days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Johannesburg over the next five days will be 11.5 on Thursday, July 3rd at 1:00 pm.

The UV index forecast for Wednesday, July 2nd in Johannesburg, CA is below.

Time UV Index Risk
8am 1.5
Low
9am 3.4
Moderate
10am 5.8
Moderate
11am 8.3
Very High
12pm 10.2
Very High
1pm 10.6
Very High
2pm 9.8
Very High
3pm 7.8
High
4pm 5.2
Moderate
5pm 2.9
Low
6pm 1.2
Low
7pm 0.3
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, July 3rd in Johannesburg, CA 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 0.5
Low
8am 1.6
Low
9am 3.7
Moderate
10am 6.4
High
11am 9
Very High
12pm 10.9
Very High
1pm 11.5
Extreme
2pm 10.6
Very High
3pm 8.4
Very High
4pm 5.7
Moderate
5pm 3.1
Moderate
6pm 1.3
Low
7pm 0.3
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, July 4th in Johannesburg, CA 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 0.5
Low
8am 1.6
Low
9am 3.6
Moderate
10am 6.2
High
11am 8.8
Very High
12pm 10.7
Very High
1pm 11.2
Extreme
2pm 10.3
Very High
3pm 8.1
Very High
4pm 5.4
Moderate
5pm 3
Moderate
6pm 1.2
Low
7pm 0.3
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, July 5th in Johannesburg, CA is below.

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