UV Index for Cos Cob, CT

Current Cos Cob UV Index

4.9 (Moderate)

Last Updated 14 minutes ago

Hourly Cos Cob UV Index

The hourly Cos Cob, CT UV Index forecast for Saturday, August 30th, 2025.

5 Day Hourly Cos Cob UV Index Forecast

Last Updated 1 hour ago

The UV index forecast for the next five days in Cos Cob, CT has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in Cos Cob over the next five days will be 7 on Saturday, August 30th at 1:00 pm.

The UV index forecast for Saturday, August 30th in Cos Cob, CT is below.

Time UV Index Risk
4pm 3.2
Moderate
5pm 1.6
Low
6pm 0.5
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, August 31st in Cos Cob, 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 0.1
Low
8am 0.6
Low
9am 1.8
Low
10am 3.4
Moderate
11am 5.2
Moderate
12pm 6.4
High
1pm 6.8
High
2pm 6.2
High
3pm 4.8
Moderate
4pm 2.9
Low
5pm 1.5
Low
6pm 0.5
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 1st in Cos Cob, 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 0.1
Low
8am 0.6
Low
9am 1.6
Low
10am 3.1
Moderate
11am 4.8
Moderate
12pm 5.9
Moderate
1pm 6.4
High
2pm 5.7
Moderate
3pm 4.5
Moderate
4pm 2.9
Low
5pm 1.4
Low
6pm 0.4
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, September 2nd in Cos Cob, 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 0.1
Low
8am 0.6
Low
9am 1.7
Low
10am 3.3
Moderate
11am 5
Moderate
12pm 6.4
High
1pm 6.8
High
2pm 6.3
High
3pm 4.9
Moderate
4pm 2.9
Low
5pm 1.4
Low
6pm 0.5
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 3rd in Cos Cob, 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 0.1
Low
8am 0.5
Low