Portland UV index in May
Typical ultraviolet levels for Portland during May, from the past year of data.
Very High
Portland
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
8.3
UV Index
May average UTC
Low
Moderate
High
Very High
Extreme
May UV
8.266
Risk level
Very High
Yearly peak
9.9171
Peak month
July
Portland UV index — monthly trend
Average UV index by month over the past year, with May highlighted.
Visiting Portland in May?
In May, Portland's typical UV index is about 8.266 — 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, Portland sees the strongest UV in Summer, peaking around 9.9171 in July. Plan sun protection accordingly.
