Temperatures in May
It's warm in May in Phoenix with an average temperature of 28°C. Temperatures this month range from a low of 27°C to a high of 29°C. At night, you can expect temperatures between 19°C and 22°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Phoenix in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Phoenix with hot temperatures, averaging around 29°C during the day and nights close to 22°C. Plenty of days with a chance of precipitation.
Mid-May
By mid-May, the average daytime temperature drops to around 28°C, with nights close to 21°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers.
End of May
By the end of May, the average daytime temperature in Phoenix will be around 27°C, with nights close to 20°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in May
In May, there is an average of 128 mm of precipitation, spread over 15 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
The average precipitation chance is 47% per day this month. Though it seems average, the weather’s variable. Some days have higher, others lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Phoenix. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Phoenix in May |
London | ||
|---|---|---|---|
 Average Temperature |
28°C | 18°C | |
 High Temp |
29°C | 21°C | |
| Low Temp |
27°C | 15°C | |
 Total Precipitation |
128 mm | 46 mm | |
| Rainy Days |
15 days | 8 days | |
April
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Phoenix?
After some sun? Then May isn’t the best time to be in Phoenix. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Phoenix in May
With 32°C, Phoenix hit the highest temperature in the last 10 years in May 2023. The lowest daytime temperature in this month was 23°C in 2016. The extreme night temperatures ranged from a low of 15°C to a high of 24°C.
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Daily Temperature in May in Phoenix
This chart shows the average daily temperatures, both day and night, for each day in May in Phoenix, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Phoenix
The chart below shows the average daily precipitation in May for Phoenix, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 15 days of rain in Phoenix.
Daily UV Index in May in Phoenix
This chart shows the average daily UV index in May in Phoenix, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Phoenix Over the Years
This chart shows the average temperature in May in Phoenix, measured in degrees Celsius, over the past years.
Total Precipitation in May in Phoenix Over the Years
This chart shows the average precipitation in May in Phoenix, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Phoenix
Click on a specific day in May for detailed info on the typical weather on that day in Phoenix. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Phoenix
Have you been to Phoenix in May?
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Average Weather in Phoenix by Month
Click on a month below to see detailed weather info for Phoenix. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
