UV Index for Norwalk, CT

Current Norwalk UV Index

0 (Low)

Last Updated 18 minutes ago

Hourly Norwalk UV Index

The hourly Norwalk, CT UV Index forecast for Wednesday, September 17th, 2025.

5 Day Hourly Norwalk UV Index Forecast

Last Updated 8 hours ago

The UV index forecast for the next five days in Norwalk, CT has no days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Norwalk over the next five days will be 6.2 on Saturday, September 20th at 1:00 pm.

The UV index forecast for Wednesday, September 17th in Norwalk, CT is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Thursday, September 18th in Norwalk, CT 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 1.4
Low
11am 2.4
Low
12pm 3.2
Moderate
1pm 5.2
Moderate
2pm 5.4
Moderate
3pm 4
Moderate
4pm 2.4
Low
5pm 1
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, September 19th in Norwalk, CT 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 0.4
Low
9am 1.2
Low
10am 2.6
Low
11am 4.2
Moderate
12pm 5.5
Moderate
1pm 5.9
Moderate
2pm 5.3
Moderate
3pm 4
Moderate
4pm 2.4
Low
5pm 1
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, September 20th in Norwalk, CT 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 0.4
Low
9am 1.3
Low
10am 2.8
Low
11am 4.5
Moderate
12pm 5.8
Moderate
1pm 6.2
High
2pm 5.6
Moderate
3pm 4.1
Moderate
4pm 2.4
Low
5pm 1
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, September 21st in Norwalk, CT 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 0.4
Low