Flagstaff weather in May
May in Flagstaff: nice, a little rain — an excellent time to visit.
#3 of 12 months in Flagstaff · #152 of 897 destinations to visit in May · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Flagstaff in May
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Flagstaff climate normals — May
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 8°C / 47°F | |
| Rainfall | 32 mm / 1.3 in | 🌦 some rain |
| Rainy days | 5 days | |
| Humidity | 34% | 🌵 dry |
| Dew point | -3°C / 26°F | |
| Sunshine | 12.8 h/day | |
| Daylight | 14 h | |
| Wind | 21 km/h / 13 mph | |
| Snowfall | 1.9 cm / 0.7 in | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Flagstaff in May — FAQ
- Is May a good time to visit Flagstaff?
- May in Flagstaff: nice, a little rain — an excellent time to visit. It ranks #3 of 12 months for Flagstaff on SeasonMap's comfort score (90/100).
- What is the weather like in Flagstaff in May?
- In May, Flagstaff averages a daily high of 21.5°C and a low of 8.1°C, with about 31.8 mm of rain over roughly 5 rainy days.
- What is the air quality in Flagstaff in May?
- Flagstaff has a mean US Air Quality Index of about 63 in May.
- Does it snow in Flagstaff in May?
- Flagstaff sees roughly 1.9 cm of snowfall in May.