San Jose UV index in January
Typical ultraviolet levels for San Jose during January, from the past year of data.
Low
San Jose
Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
1.9
UV Index
January average UTC
Low
Moderate
High
Very High
Extreme
January UV
1.9091
Risk level
Low
Yearly peak
10.722
Peak month
July
San Jose UV index — monthly trend
Average UV index by month over the past year, with January highlighted.
Visiting San Jose in January?
In January, San Jose's typical UV index is about 1.9091 — a low risk level. Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
Across the year, San Jose sees the strongest UV in Summer, peaking around 10.722 in July. Plan sun protection accordingly.
