Boston — UV index
UV index
2.3
Low
Sunrise / sunset
07:07 / 17:48
Hourly today
0.0
05:00
0.0
06:00
0.0
07:00
0.1
08:00
0.9
09:00
1.9
10:00
3.0
11:00
3.7
12:00
4.0
13:00
3.7
14:00
3.0
15:00
1.9
16:00
0.8
17:00
0.1
18:00
0.0
19:00
0.0
20:00
0.0
21:00
Coming days
Today
4.0
Tomorrow
4.0
Monday
4.0
Tuesday
3.5
Wednesday
3.9
Thursday
3.6
Friday
3.5
UV scale
≤3
Low
No extra protection.
≤6
Moderate
A hat and SPF 30 if you stay out for long.
≤8
High
Shade at midday, SPF 30–50.
≤11
Very high
SPF 50 and covered clothing.
11+
Extreme
Avoid direct sun.