San Francisco UV index in April
Typical ultraviolet levels for San Francisco during April, from the past year of data.
High
San Francisco
High UV. Avoid the sun during peak hours and wear protective clothing, sunscreen, and a hat.
7.5
UV Index
April average
Low
Moderate
High
Very High
Extreme
April UV
7.5227
Risk level
High
Yearly peak
10.8042
Peak month
July
San Francisco UV index — monthly trend
Average UV index by month over the past year, with April highlighted.
Visiting San Francisco in April?
In April, San Francisco's typical UV index is about 7.5227 — a high risk level. High UV. Avoid the sun during peak hours and wear protective clothing, sunscreen, and a hat.
Across the year, San Francisco sees the strongest UV in Summer, peaking around 10.8042 in July. Plan sun protection accordingly.
