UV Index Today in Boston, Massachusetts (MA)

Wednesday, July 15, 2026 -12:14 PM EDT (GMT-4)

The UV Index in Boston, Massachusetts (MA) right now is 6.2. This reading was last updated at 12:00 PM EDT, about 14 minutes ago. The UV Index at1:00 PM EDT, in about 45 minutes from now, is expected to be 6.3.

The maximum UV Index today in Boston is expected to be 6.3 at 1:00 PM EDT,45 minutes from now. The maximum UV Index tomorrow is expected to be 8 at 1:00 PM EDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

July 15
6.3
1:00 PM EDT
High

Tomorrow

July 16
8
1:00 PM EDT
Very High

UV Index Today Hourly

July 15

The sun will be strongest in Boston, Massachusetts (MA) around 1:00 PM EDT today, with a UV Index of 6.3 (High risk).

02468105 AM6 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMEastern Daylight Time (EDT, GMT-4)Now: 12:14 PM00.10.61.62.84.56.16.26.35.64.12.31.30.50.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

July 16

UV Index tomorrow for Boston, Massachusetts (MA) reaches 8 at 1:00 PM EDT, representingVery High risk.

02468105 AM6 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMEastern Daylight Time (EDT, GMT-4)00.10.51.43.156.97.887.44.830.80.40.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

July 14, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0.1
Low
7:00 AM0.6
Low
8:00 AM1.6
Low
9:00 AM3
Moderate
10:00 AM5.2
Moderate
11:00 AM5.2
Moderate
12:00 PM7.5
Very High
1:00 PM8.4
Very High
2:00 PM7.6
Very High
3:00 PM6
High
4:00 PM4.2
Moderate
5:00 PM2.4
Low
6:00 PM1.1
Low
7:00 PM0.3
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 15, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0.1
Low
7:00 AM0.6
Low
8:00 AM1.6
Low
9:00 AM2.8
Moderate
10:00 AM4.5
Moderate
11:00 AM6.1
High
12:00 PM6.2
High
1:00 PM6.3
High
2:00 PM5.6
High
3:00 PM4.1
Moderate
4:00 PM2.3
Low
5:00 PM1.3
Low
6:00 PM0.5
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 16, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0.1
Low
7:00 AM0.5
Low
8:00 AM1.4
Low
9:00 AM3.1
Moderate
10:00 AM5
Moderate
11:00 AM6.9
High
12:00 PM7.8
Very High
1:00 PM8
Very High
2:00 PM7.4
High
3:00 PM4.8
Moderate
4:00 PM3
Moderate
5:00 PM0.8
Low
6:00 PM0.4
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 17, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0.1
Low
7:00 AM0.5
Low
8:00 AM1.5
Low
9:00 AM3.1
Moderate
10:00 AM5
Moderate
11:00 AM6.9
High
12:00 PM8.1
Very High
1:00 PM8.4
Very High
2:00 PM7.6
Very High
3:00 PM5.9
High
4:00 PM3.9
Moderate
5:00 PM2.1
Low
6:00 PM0.9
Low
7:00 PM0.3
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 18, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0.1
Low
8:00 AM0.3
Low
9:00 AM0.3
Low
10:00 AM1.5
Low
11:00 AM2.4
Low
12:00 PM1.8
Low
1:00 PM1.7
Low
2:00 PM3.6
Moderate
3:00 PM2.4
Low
4:00 PM2
Low
5:00 PM1.2
Low
6:00 PM0.7
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

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