UV Index for Hartford, CT

Current Hartford UV Index

0 (Low)

Last Updated 21 minutes ago

Hourly Hartford UV Index

The hourly Hartford, CT UV Index forecast for Monday, September 1st, 2025.

5 Day Hourly Hartford UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Hartford, CT has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Hartford over the next five days will be 6.9 on Tuesday, September 2nd at 1:00 pm.

The UV index forecast for Monday, September 1st in Hartford, CT is below.

Time UV Index Risk
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0.1
Low
8am 0.6
Low
9am 1.5
Low
10am 3.1
Moderate
11am 4.4
Moderate
12pm 5.8
Moderate
1pm 6.2
High
2pm 5.6
Moderate
3pm 4.3
Moderate
4pm 2.6
Low
5pm 1.2
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 Tuesday, September 2nd 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 0.1
Low
8am 0.6
Low
9am 1.8
Low
10am 3.4
Moderate
11am 5.2
Moderate
12pm 6.5
High
1pm 6.9
High
2pm 6.2
High
3pm 4.7
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 Wednesday, September 3rd 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 0.1
Low
8am 0.6
Low
9am 1.7
Low
10am 3.4
Moderate
11am 5.1
Moderate
12pm 6.3
High
1pm 6.8
High
2pm 2.8
Low
3pm 2.6
Low
4pm 1
Low
5pm 0.2
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 Thursday, September 4th 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 0.1
Low
8am 0.4
Low
View Historical UV Index Data