Average Sunshine in Arizona for May

Number of Sunny Days

In the table below, the average number of Sunny Days for a city in Arizona is the total days this month when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.

Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.

Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are annual averages, made from years of weather watching.

Days of sunshine in May
City Sunny
Partly Sunny
Total Days
With Sun
Flagstaff 15 9 24
Phoenix 21 7 28
Tucson 20 7 27
Winslow 17 9 26
Yuma 24 5 29

Amount of Sun

Here's another way to look at how much sunshine a city gets. The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are monthly averages based on many years of weather observations.

Percent sunshine for May
City % Sun
Flagstaff 88
Phoenix 93
Tucson 92
Yuma 95

National Climatic Data Center. Comparative Climatic Data.

Arizona Sunshine
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