UV Index for Johnstown, WI

Current Johnstown UV Index

0 (Low)

Last Updated 53 minutes ago

Hourly Johnstown UV Index

The hourly Johnstown, WI UV Index forecast for Friday, October 10th, 2025.

5 Day Hourly Johnstown UV Index Forecast

Last Updated 17 hours ago

The UV index forecast for the next five days in Johnstown, WI has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Johnstown over the next five days will be 3.9 on Saturday, October 11th at 1:00 pm.

The UV index forecast for Friday, October 10th in Johnstown, WI is below.

Time UV Index Risk
7am 0
Low
8am 0
Low
9am 0.2
Low
10am 0.4
Low
11am 1.6
Low
12pm 0.9
Low
1pm 2.4
Low
2pm 1.5
Low
3pm 1.8
Low
4pm 0.8
Low
5pm 0.4
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, October 11th in Johnstown, WI 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 0.6
Low
10am 1.6
Low
11am 2.7
Low
12pm 3.6
Moderate
1pm 3.9
Moderate
2pm 3.2
Moderate
3pm 1.7
Low
4pm 0.7
Low
5pm 0.5
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, October 12th in Johnstown, WI 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 0.6
Low
10am 1.5
Low
11am 2.6
Low
12pm 3.6
Moderate
1pm 3.9
Moderate
2pm 3.5
Moderate
3pm 1.8
Low
4pm 0.2
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 Monday, October 13th in Johnstown, WI 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