Phoenix Weather in May
May in Phoenix brings very high temperatures, with daytime highs of 34°C (93°F) and nights around 19°C (66°F). Only 4.9 mm (0.2 in) of rainfall is typical, making it a largely dry month.
Rainfall in Phoenix in May
Typically, you can expect about a single day of rain this month, with 4.9 mm (0.2 in) on average. On the rare occasion it rains, expect a brief, moderate shower rather than a heavy downpour.
Temperature in Phoenix in May
Daytime temperatures in Phoenix reach 34°C (93°F) in May, dropping to 19°C (66°F) at night. Mornings and evenings are often more comfortable than the peak afternoon hours. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Phoenix in May
Expect a lot of sunshine this month, with about 401 hours of sun. These sunny conditions add to the overall experience.May in Phoenix has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Phoenix's climate page.
Phoenix Temperature in May
Min Temperature
19°C (66°F)
Max Temperature
34°C (93°F)
Chance of Rain
3%
Precipitation
4.9 mm (0.2 in)
Rainy days
a single day
Humidity
22%
Sunshine
401 hours
Percentage Sunshine
93%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Phoenix typically rise from around 33°C (91°F) at the start of May to approximately 37°C (99°F) by the end. Nights are warm, with lows typically ranging from 19°C (66°F) to 23°C (73°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Phoenix in May
Browse day-by-day weather records for Phoenix spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Phoenix historical weather extremes in May
Based on 50 years of weather observations in Phoenix between 1976 and 2026, these are the recorded extremes.
- On May 28, 1983, temperatures climbed to 45°C (113°F), marking the warmest May day on record.
- Phoenix experienced its chilliest May day on May 13, 1998, reaching only 20°C (68°F).
- The lowest overnight temperature recorded in May was 9°C (48°F) (May 10, 1979).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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What to Wear in Phoenix in May
Get ready for hot weather in May! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Almost no rain is expected, so no need to bring rain gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Phoenix in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Phoenix's climate page.
Temperature Rainfall Sunshine Humidity
See the full Phoenix climate overview or explore weather in the United States of America.
