UV Index for Hartford, CT

Current Hartford UV Index

0.2 (Low)

Last Updated 6 minutes ago

Hourly Hartford UV Index

The hourly Hartford, CT UV Index forecast for Tuesday, September 16th, 2025.

5 Day Hourly Hartford UV Index Forecast

Last Updated 4 hours ago

The UV index forecast for the next five days in Hartford, CT has no days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Hartford over the next five days will be 6 on Friday, September 19th at 1:00 pm.

The UV index forecast for Tuesday, September 16th in Hartford, CT is below.

Time UV Index Risk
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 17th in Hartford, 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 3.9
Moderate
12pm 5.4
Moderate
1pm 5.4
Moderate
2pm 3.4
Moderate
3pm 1.8
Low
4pm 1.3
Low
5pm 0.7
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 Thursday, September 18th in Hartford, 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 0.3
Low
9am 1.2
Low
10am 2.5
Low
11am 4
Moderate
12pm 5.2
Moderate
1pm 5.7
Moderate
2pm 5.2
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 Hartford, 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 4.4
Moderate
12pm 5.7
Moderate
1pm 6
High
2pm 5.4
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 Saturday, September 20th in Hartford, 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
View Historical UV Index Data