UV and heat

UV and heat by city, month by month

For each city: the average daily peak UV index for every month, how many hours a day UV stays at 3 or more, average highs and lows, humidity and daylight, from five years of NASA satellite data and the nearest long-running weather station. The number beside each city is its highest monthly average peak UV.

How to read the UV index

The UV index tells you how strong the sun’s ultraviolet radiation is. The higher the number, the faster UV can damage your skin and eyes. The World Health Organization advises sun protection from 3, and more care from 8. What the UV index means, and when to cover up.