Cali UV index in January
Typical ultraviolet levels for Cali during January, from the past year of data.
Extreme
Cali
Extreme UV. Avoid sun exposure, seek shade, and use comprehensive protection: clothing, sunscreen, and a hat.
11.5
UV Index
January average
Low
Moderate
High
Very High
Extreme
January UV
11.5163
Risk level
Extreme
Yearly peak
15.5098
Peak month
April
Cali UV index — monthly trend
Average UV index by month over the past year, with January highlighted.
Visiting Cali in January?
In January, Cali's typical UV index is about 11.5163 — a extreme risk level. Extreme UV. Avoid sun exposure, seek shade, and use comprehensive protection: clothing, sunscreen, and a hat.
Across the year, Cali sees the strongest UV in Spring, peaking around 15.5098 in April. Plan sun protection accordingly.
