Adelaide weather in May
May in Adelaide: cool, a little rain, with clean air — an excellent time to visit.
#9 of 12 months in Adelaide · #309 of 604 destinations to visit in May · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Adelaide climate normals — May
| Daytime high | 17°C / 62°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 53 mm / 2.1 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 9°C / 49°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 10.3 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 23 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Adelaide in May — FAQ
- Is May a good time to visit Adelaide?
- May in Adelaide: cool, a little rain, with clean air — an excellent time to visit. It ranks #9 of 12 months for Adelaide on SeasonMap's comfort score (81/100).
- What is the weather like in Adelaide in May?
- In May, Adelaide averages a daily high of 16.8°C and a low of 11.1°C, with about 52.8 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Adelaide in May?
- Adelaide has a mean US Air Quality Index of about 23 in May.