San Jose UV index in May
Typical ultraviolet levels for San Jose during May, from the past year of data.
Very High
San Jose
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
9.5
UV Index
May average UTC
Low
Moderate
High
Very High
Extreme
May UV
9.463
Risk level
Very High
Yearly peak
10.722
Peak month
July
San Jose UV index — monthly trend
Average UV index by month over the past year, with May highlighted.
Visiting San Jose in May?
In May, San Jose's typical UV index is about 9.463 — a very high risk level. Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
Across the year, San Jose sees the strongest UV in Summer, peaking around 10.722 in July. Plan sun protection accordingly.
