San Francisco — UV index
UV index
4.7
Moderate
Sunrise / sunset
07:27 / 18:20
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
3.2
11:00
4.2
12:00
4.8
13:00
4.8
14:00
4.1
15:00
3.0
16:00
1.6
17:00
0.5
18:00
0.0
19:00
0.0
20:00
0.0
21:00
Coming days
Today
4.8
Tomorrow
4.2
Monday
4.7
Tuesday
4.6
Wednesday
4.2
Thursday
4.0
Friday
4.2
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.