Grand Canyon National Park weather in May
May in Grand Canyon National Park: warm, dry — an excellent time to visit.
#5 of 12 months in Grand Canyon National Park · #318 of 604 destinations to visit in May · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Grand Canyon National Park climate normals — May
| Daytime high | 30°C / 85°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 60°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 19 mm / 0.7 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 24% | 🌵 dry |
| Dew point | -1°C / 30°F | |
| Sunshine | 12.8 h/day | |
| Daylight | 14.1 h | |
| Wind | 19 km/h / 12 mph | |
| Snowfall | 0.4 cm / 0.2 in | |
| Air quality (US AQI) | 56 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Grand Canyon National Park in May — FAQ
- Is May a good time to visit Grand Canyon National Park?
- May in Grand Canyon National Park: warm, dry — an excellent time to visit. It ranks #5 of 12 months for Grand Canyon National Park on SeasonMap's comfort score (81/100).
- What is the weather like in Grand Canyon National Park in May?
- In May, Grand Canyon National Park averages a daily high of 29.7°C and a low of 15.4°C, with about 18.7 mm of rain over roughly 3.6 rainy days.
- What is the air quality in Grand Canyon National Park in May?
- Grand Canyon National Park has a mean US Air Quality Index of about 56 in May.