Flagstaff (Grand Canyon) weather in May
Temperature, rain and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Excellent
Best time to visit: April – June, September – October
What is the weather like in Flagstaff (Grand Canyon) in May?
In May, Flagstaff (Grand Canyon) is warm: daytime highs average 21 °C, and nights cool down to about 8 °C. With around 10 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 18 mm in total. All in all, May is an excellent month for a holiday in Flagstaff (Grand Canyon).
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 13 h 59 min05:23 – 19:22
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 29 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−7America/Phoenix
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %98 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Flagstaff (Grand Canyon) in May: quick answers
Is Flagstaff (Grand Canyon) hot in May?
Warm rather than hot: in May, daytime highs in Flagstaff (Grand Canyon) average 21 °C and nights cool to about 8 °C.
Does it rain much in Flagstaff (Grand Canyon) in May?
Rain is rare: about 4 days bring 18 mm in total.
Flagstaff (Grand Canyon) month by month
The whole year in Flagstaff (Grand Canyon)All destinations: USAWhere to go in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences