UV Index Today in San Jose, California (CA)

Saturday, August 29, 2026 -9:47 AM PDT (GMT-7)

The UV Index in San Jose, California (CA) right now is 1.8. This reading was last updated at 9:00 AM PDT, about 47 minutes ago. The UV Index at10:00 AM PDT, in about 12 minutes from now, is expected to be 3.6.

The maximum UV Index today in San Jose is expected to be 8.3 at 1:00 PM PDT,3 hours and 12 minutes from now. The maximum UV Index tomorrow is expected to be 7.8 at 1:00 PM PDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

August 29
8.3
1:00 PM PDT
Very High

Tomorrow

August 30
7.8
1:00 PM PDT
Very High

UV Index Today Hourly

August 29

San Jose, California (CA) sees Very High-risk UV conditions today, with the index reaching8.3 around 1:00 PM PDT.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMPacific Daylight Time (PDT, GMT-7)Now: 9:47 AM00.61.83.65.87.68.37.86.1420.70.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

August 30

Tomorrow in San Jose, California (CA), the UV Index is expected to reach up to 7.8 around1:00 PM PDT, placing it in the Very High risk category for sun exposure.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMPacific Daylight Time (PDT, GMT-7)00.51.63.35.47.17.87.45.93.920.70.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

August 28, 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 AM0.1
Low
9:00 AM0.7
Low
10:00 AM2.2
Low
11:00 AM2
Low
12:00 PM1.3
Low
1:00 PM7.1
High
2:00 PM6.6
High
3:00 PM4.1
Moderate
4:00 PM4.2
Moderate
5:00 PM1.6
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 29, 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 AM0.6
Low
9:00 AM1.8
Low
10:00 AM3.6
Moderate
11:00 AM5.8
High
12:00 PM7.6
Very High
1:00 PM8.3
Very High
2:00 PM7.8
Very High
3:00 PM6.1
High
4:00 PM4
Moderate
5:00 PM2
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 30, 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 AM0.5
Low
9:00 AM1.6
Low
10:00 AM3.3
Moderate
11:00 AM5.4
Moderate
12:00 PM7.1
High
1:00 PM7.8
Very High
2:00 PM7.4
High
3:00 PM5.9
High
4:00 PM3.9
Moderate
5:00 PM2
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 31, 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 AM0.5
Low
9:00 AM1.6
Low
10:00 AM3.5
Moderate
11:00 AM5.6
High
12:00 PM7.4
High
1:00 PM8.2
Very High
2:00 PM7.8
Very High
3:00 PM6.3
High
4:00 PM4.1
Moderate
5:00 PM2
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 1, 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 AM0.5
Low
9:00 AM1.7
Low
10:00 AM3.5
Moderate
11:00 AM5.7
High
12:00 PM7.4
High
1:00 PM8.2
Very High
2:00 PM7.7
Very High
3:00 PM6
High
4:00 PM3.9
Moderate
5:00 PM1.9
Low
6:00 PM0.7
Low
7:00 PM0.1
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)