San Diego UV index in January
Typical ultraviolet levels for San Diego during January, from the past year of data.
Low
San Diego
Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
2.5
UV Index
January average UTC
Low
Moderate
High
Very High
Extreme
January UV
2.5385
Risk level
Low
Yearly peak
10.5463
Peak month
July
San Diego UV index — monthly trend
Average UV index by month over the past year, with January highlighted.
Visiting San Diego in January?
In January, San Diego's typical UV index is about 2.5385 — a low risk level. Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
Across the year, San Diego sees the strongest UV in Summer, peaking around 10.5463 in July. Plan sun protection accordingly.
