UV Index for Crystal Lake, IL

Current Crystal Lake UV Index

0.4 (Low)

Last Updated 58 minutes ago

Hourly Crystal Lake UV Index

The hourly Crystal Lake, IL UV Index forecast for Wednesday, November 19th, 2025.

5 Day Hourly Crystal Lake UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Crystal Lake, IL has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Crystal Lake over the next five days will be 1.9 on Thursday, November 20th at 12:00 pm.

The UV index forecast for Wednesday, November 19th in Crystal Lake, IL is below.

Time UV Index Risk
4pm 0.1
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, November 20th in Crystal Lake, IL 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 0.6
Low
10am 1.2
Low
11am 1.7
Low
12pm 1.9
Low
1pm 1.6
Low
2pm 1
Low
3pm 0.4
Low
4pm 0.1
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 Friday, November 21st in Crystal Lake, IL 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 0.4
Low
10am 1
Low
11am 1.4
Low
12pm 1.6
Low
1pm 1.4
Low
2pm 0.8
Low
3pm 0.4
Low
4pm 0.1
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 Saturday, November 22nd in Crystal Lake, IL 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 0.6
Low
10am 1.2
Low
11am 1.6
Low
12pm 1.8
Low
1pm 1.6
Low
2pm 1
Low
3pm 0.5
Low
4pm 0.1
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 23rd in Crystal Lake, IL 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