UV Index Today in San Francisco, California (CA)

Tuesday, October 13, 2026 -2:28 PM PDT (GMT-7)

The UV Index in San Francisco, California (CA) right now is 4.9. This reading was last updated at 2:00 PM PDT, about 28 minutes ago. The UV Index at3:00 PM PDT, in about 31 minutes from now, is expected to be 3.8.

The maximum UV Index today in San Francisco was 5.3 at 1:00 PM PDT,1 hour and 28 minutes ago. The maximum UV Index tomorrow is expected to be 5.3 at 1:00 PM PDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

October 13
5.3
1:00 PM PDT
Moderate

Tomorrow

October 14
5.3
1:00 PM PDT
Moderate

UV Index Today Hourly

October 13

Data shows San Francisco, California (CA)'s UV Index climbing to 5.3 today, peaking at1:00 PM PDT under Moderate conditions.

02468108 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMPacific Daylight Time (PDT, GMT-7)Now: 2:28 PM00.61.73.24.65.34.93.82.20.90.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

October 14

The UV Index for San Francisco, California (CA) peaks at 5.3 tomorrow at 1:00 PM PDT, classified as Moderate risk.

02468108 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMPacific Daylight Time (PDT, GMT-7)00.61.73.34.65.34.93.82.20.90.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

October 12, 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
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.6
Low
11:00 AM3
Moderate
12:00 PM4.3
Moderate
1:00 PM4.8
Moderate
2:00 PM4.5
Moderate
3:00 PM3.5
Moderate
4:00 PM2.1
Low
5:00 PM0.9
Low
6:00 PM0.2
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

October 13, 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
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.7
Low
11:00 AM3.2
Moderate
12:00 PM4.6
Moderate
1:00 PM5.3
Moderate
2:00 PM4.9
Moderate
3:00 PM3.8
Moderate
4:00 PM2.2
Low
5:00 PM0.9
Low
6:00 PM0.2
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

October 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
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.7
Low
11:00 AM3.3
Moderate
12:00 PM4.6
Moderate
1:00 PM5.3
Moderate
2:00 PM4.9
Moderate
3:00 PM3.8
Moderate
4:00 PM2.2
Low
5:00 PM0.9
Low
6:00 PM0.2
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

October 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
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.7
Low
11:00 AM3.2
Moderate
12:00 PM4.7
Moderate
1:00 PM5.4
Moderate
2:00 PM5
Moderate
3:00 PM3.8
Moderate
4:00 PM2.2
Low
5:00 PM0.9
Low
6:00 PM0.2
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

October 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
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.7
Low
11:00 AM3.3
Moderate
12:00 PM4.7
Moderate
1:00 PM5.4
Moderate
2:00 PM5.1
Moderate
3:00 PM3.8
Moderate
4:00 PM2.2
Low
5:00 PM0.9
Low
6:00 PM0.2
Low
7:00 PM0
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)