UV Index Today in San Francisco, California (CA)

Friday, May 22, 2026 -11:40 AMPDT (GMT-7)

The UV Index in San Francisco, California (CA) right now is 5.6. This reading was last updated at 11:00 AM PDT, about 40 minutes ago. The UV Index at12:00 PM PDT, in about 19 minutes from now, is expected to be 7.6.

The maximum UV Index today in San Francisco is expected to be 8.4 at 1:00 PM PDT,1 hour and 19 minutes from now. The maximum UV Index tomorrow is expected to be 8.6 at 1:00 PM PDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

May 22
8.4
1:00 PM PDT
Very High

Tomorrow

May 23
8.6
1:00 PM PDT
Very High

UV Index Today Hourly

May 22

Data shows San Francisco, California (CA)'s UV Index climbing to 8.4 today, peaking at1:00 PM PDT under Very High conditions.

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMPacific Daylight Time (PDT, GMT-7)Now: 11:40 AM00.20.71.83.55.67.68.48.26.74.62.81.30.40
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

May 23

The UV Index for San Francisco, California (CA) peaks at 8.6 tomorrow at 1:00 PM PDT, classified as Very High risk.

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMPacific Daylight Time (PDT, GMT-7)00.20.71.93.75.87.78.68.26.84.82.81.30.40
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

May 21, 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 AM0.2
Low
8:00 AM0.8
Low
9:00 AM2
Low
10:00 AM3.8
Moderate
11:00 AM5.8
High
12:00 PM7.6
Very High
1:00 PM8.4
Very High
2:00 PM8.2
Very High
3:00 PM6.5
High
4:00 PM4.5
Moderate
5:00 PM2.7
Moderate
6:00 PM1.2
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

May 22, 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 AM0.2
Low
8:00 AM0.7
Low
9:00 AM1.8
Low
10:00 AM3.5
Moderate
11:00 AM5.6
High
12:00 PM7.6
Very High
1:00 PM8.4
Very High
2:00 PM8.2
Very High
3:00 PM6.7
High
4:00 PM4.6
Moderate
5:00 PM2.8
Moderate
6:00 PM1.3
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

May 23, 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 AM0.2
Low
8:00 AM0.7
Low
9:00 AM1.9
Low
10:00 AM3.7
Moderate
11:00 AM5.8
High
12:00 PM7.7
Very High
1:00 PM8.6
Very High
2:00 PM8.2
Very High
3:00 PM6.8
High
4:00 PM4.8
Moderate
5:00 PM2.8
Moderate
6:00 PM1.3
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

May 24, 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 AM0.2
Low
8:00 AM0.8
Low
9:00 AM2.1
Low
10:00 AM3.9
Moderate
11:00 AM5.9
High
12:00 PM7.7
Very High
1:00 PM8.4
Very High
2:00 PM8
Very High
3:00 PM6.7
High
4:00 PM4.8
Moderate
5:00 PM2.8
Moderate
6:00 PM1.3
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

May 25, 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 AM0.2
Low
8:00 AM0.9
Low
9:00 AM1.9
Low
10:00 AM3.1
Moderate
11:00 AM5
Moderate
12:00 PM7
High
1:00 PM7.8
Very High
2:00 PM7.7
Very High
3:00 PM6
High
4:00 PM4
Moderate
5:00 PM2.8
Moderate
6:00 PM1.2
Low
7:00 PM0.4
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)