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
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.
