Phoenix weather in May
Long-run climate averages for Phoenix, AZ in May, plus what the forecast models say for the days ahead.
In May, Phoenix averages 94°F by day and 68°F at night. The wettest month is usually August.
May in Phoenix averages a daytime high of 94°F and an overnight low of 68°F, which reads as hot for this part of the world. Across the whole year Phoenix sees roughly 9 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Phoenix forecast with every model compared and how much they currently agree.
Phoenix weather by month
what to expect in Phoenix through the year, 1991-2020 averagesHere is Phoenix's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Phoenix by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Phoenix, scoring 97/100 on our CheckWeather Score, ahead of the American at 80. See the full US accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Phoenix in May?
Is May a good time to visit Phoenix?
Does it rain a lot in Phoenix in May?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .