Philadelphia UV index in May
Typical ultraviolet levels for Philadelphia during May, from the past year of data.
Very High
Philadelphia
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
8.6
UV Index
May average
Low
Moderate
High
Very High
Extreme
May UV
8.5753
Risk level
Very High
Yearly peak
9.8446
Peak month
July
Philadelphia UV index — monthly trend
Average UV index by month over the past year, with May highlighted.
Visiting Philadelphia in May?
In May, Philadelphia's typical UV index is about 8.5753 — a very high risk level. Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
Across the year, Philadelphia sees the strongest UV in Summer, peaking around 9.8446 in July. Plan sun protection accordingly.
