Boulder — UV index
UV index
0.0
Low
Sunrise / sunset
07:26 / 18:02
Hourly today
0.0
05:00
0.0
06:00
0.0
07:00
0.1
08:00
0.8
09:00
1.9
10:00
3.1
11:00
4.2
12:00
4.6
13:00
4.5
14:00
3.5
15:00
2.0
16:00
1.1
17:00
0.2
18:00
0.0
19:00
0.0
20:00
0.0
21:00
Coming days
Today
4.6
Tomorrow
4.5
Saturday
3.4
Sunday
2.9
Monday
3.6
Tuesday
4.0
Wednesday
3.6
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.