Phoenix weather in May
May in Phoenix: sweltering, dry — fine if you can take 35°C afternoons.
#8 of 12 months in Phoenix · #707 of 897 destinations to visit in May · comfort 71/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Phoenix in May
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Phoenix climate normals — May
| Daytime high | 35°C / 96°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Rainfall | 2 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 17% | 🌵 dry |
| Dew point | -1°C / 30°F | |
| Sunshine | 12.8 h/day | |
| Daylight | 13.9 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 59 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Phoenix in May — FAQ
- Is May a good time to visit Phoenix?
- May in Phoenix: sweltering, dry — fine if you can take 35°C afternoons. It ranks #8 of 12 months for Phoenix on SeasonMap's comfort score (71/100).
- What is the weather like in Phoenix in May?
- In May, Phoenix averages a daily high of 35.3°C and a low of 19.4°C, with about 1.7 mm of rain over roughly 0.6 rainy days.
- What is the air quality in Phoenix in May?
- Phoenix has a mean US Air Quality Index of about 59 in May.