Philadelphia UV index in January
Typical ultraviolet levels for Philadelphia during January, from the past year of data.
Low
Philadelphia
Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
1.4
UV Index
January average UTC
Low
Moderate
High
Very High
Extreme
January UV
1.4344
Risk level
Low
Yearly peak
9.8446
Peak month
July
Philadelphia UV index — monthly trend
Average UV index by month over the past year, with January highlighted.
Visiting Philadelphia in January?
In January, Philadelphia's typical UV index is about 1.4344 — a low risk level. Low UV. You can safely enjoy being outside; the sun's rays are not very strong.
Across the year, Philadelphia sees the strongest UV in Summer, peaking around 9.8446 in July. Plan sun protection accordingly.
