Cali UV index in October
Typical ultraviolet levels for Cali during October, from the past year of data.
Extreme
Cali
Extreme UV. Avoid sun exposure, seek shade, and use comprehensive protection: clothing, sunscreen, and a hat.
15.2
UV Index
October average UTC
Low
Moderate
High
Very High
Extreme
October UV
15.2312
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 October highlighted.
Visiting Cali in October?
In October, Cali's typical UV index is about 15.2312 — 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.
