St. Louis UV index in December
Typical ultraviolet levels for St. Louis during December, from the past year of data.
Low
St. Louis
Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
1.8
UV Index
December average UTC
Low
Moderate
High
Very High
Extreme
December UV
1.8266
Risk level
Low
Yearly peak
10.0513
Peak month
July
St. Louis UV index — monthly trend
Average UV index by month over the past year, with December highlighted.
Visiting St. Louis in December?
In December, St. Louis's typical UV index is about 1.8266 — a low risk level. Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
Across the year, St. Louis sees the strongest UV in Summer, peaking around 10.0513 in July. Plan sun protection accordingly.
