Seattle UV index in December
Typical ultraviolet levels for Seattle during December, from the past year of data.
Low
Seattle
Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
0.9
UV Index
December average UTC
Low
Moderate
High
Very High
Extreme
December UV
0.8875
Risk level
Low
Yearly peak
9.4524
Peak month
July
Seattle UV index — monthly trend
Average UV index by month over the past year, with December highlighted.
Visiting Seattle in December?
In December, Seattle's typical UV index is about 0.8875 — a low risk level. Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
Across the year, Seattle sees the strongest UV in Summer, peaking around 9.4524 in July. Plan sun protection accordingly.
