Saguaro National Park weather in May
May in Saguaro National Park: warm, dry, with clean air — an excellent time to visit.
#5 of 12 months in Saguaro National Park · #143 of 604 destinations to visit in May · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Saguaro National Park climate normals — May
| Daytime high | 28°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 19% | 🌵 dry |
| Dew point | -6°C / 22°F | |
| Sunshine | 12.6 h/day | |
| Daylight | 13.8 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Saguaro National Park?
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Saguaro National Park in May — FAQ
- Is May a good time to visit Saguaro National Park?
- May in Saguaro National Park: warm, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Saguaro National Park on SeasonMap's comfort score (88/100).
- What is the weather like in Saguaro National Park in May?
- In May, Saguaro National Park averages a daily high of 28.3°C and a low of 13.3°C, with about 3.4 mm of rain over roughly 1.2 rainy days.
- What is the air quality in Saguaro National Park in May?
- Saguaro National Park has a mean US Air Quality Index of about 50 in May.