UV Index Today in Boston, Massachusetts (MA)

Tuesday, April 7, 2026 - 4:47 AM EDT (GMT-4)

The UV Index in Boston, Massachusetts (MA) right now is 0. This reading was last updated at 4:00 AM EDT, about 47 minutes ago. The UV Index at 5:00 AM EDT, in about 12 minutes from now, is expected to be 0.

The maximum UV Index today in Boston is expected to be 1.8 at 3:00 PM EDT, 10 hours and 12 minutes from now. The maximum UV Index tomorrow is expected to be 5.4 at 1:00 PM EDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

April 7
1.8
3:00 PM EDT
Low

Tomorrow

April 8
5.4
1:00 PM EDT
Moderate

UV Index Today Hourly

April 7

The sun will be strongest in Boston, Massachusetts (MA) around 3:00 PM EDT today, with a UV Index of 1.8 (Low risk).

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMEastern Daylight Time (EDT, GMT-4) Now: 4:47 AM00.10.40.70.90.70.70.811.81.30.40.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

April 8

UV Index tomorrow for Boston, Massachusetts (MA) reaches 5.4 at 1:00 PM EDT, representing Moderate risk.

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMEastern Daylight Time (EDT, GMT-4) 00.20.61.52.94.25.25.44.83.62.210.30
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

April 6, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0.1
Low
8:00 AM 0.6
Low
9:00 AM 1.6
Low
10:00 AM 3
Moderate
11:00 AM 4.4
Moderate
12:00 PM 5.4
Moderate
1:00 PM 5
Moderate
2:00 PM 3.9
Moderate
3:00 PM 3.2
Moderate
4:00 PM 2
Low
5:00 PM 0.9
Low
6:00 PM 0.3
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 7, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0.1
Low
8:00 AM 0.4
Low
9:00 AM 0.7
Low
10:00 AM 0.9
Low
11:00 AM 0.7
Low
12:00 PM 0.7
Low
1:00 PM 0.8
Low
2:00 PM 1
Low
3:00 PM 1.8
Low
4:00 PM 1.3
Low
5:00 PM 0.4
Low
6:00 PM 0.2
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 8, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0.2
Low
8:00 AM 0.6
Low
9:00 AM 1.5
Low
10:00 AM 2.9
Moderate
11:00 AM 4.2
Moderate
12:00 PM 5.2
Moderate
1:00 PM 5.4
Moderate
2:00 PM 4.8
Moderate
3:00 PM 3.6
Moderate
4:00 PM 2.2
Low
5:00 PM 1
Low
6:00 PM 0.3
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 9, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0.2
Low
8:00 AM 0.7
Low
9:00 AM 1.7
Low
10:00 AM 3.1
Moderate
11:00 AM 4.5
Moderate
12:00 PM 5.5
High
1:00 PM 5.7
High
2:00 PM 5.1
Moderate
3:00 PM 3.8
Moderate
4:00 PM 2.4
Low
5:00 PM 1.1
Low
6:00 PM 0.4
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 10, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0.2
Low
8:00 AM 0.7
Low
9:00 AM 1.8
Low
10:00 AM 3.3
Moderate
11:00 AM 4.9
Moderate
12:00 PM 5.9
High
1:00 PM 6.2
High
2:00 PM 5.5
High
3:00 PM 4.1
Moderate
4:00 PM 2.5
Moderate
5:00 PM 1.2
Low
6:00 PM 0.4
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

Maximum UV Index Today
Data Source: National Oceanic and Atmospheric Administration (NOAA)