Cairns weather in May
May in Cairns: warm, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Cairns · #224 of 604 destinations to visit in May · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Cairns climate normals — May
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 21°C / 71°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 62 mm / 2.4 in | 🌦 some rain |
| Rainy days | 12 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 9.7 h/day | |
| Daylight | 11.3 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 24 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Cairns?
Loading map…
Cairns in May — FAQ
- Is May a good time to visit Cairns?
- May in Cairns: warm, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Cairns on SeasonMap's comfort score (84/100).
- What is the weather like in Cairns in May?
- In May, Cairns averages a daily high of 25.2°C and a low of 21.4°C, with about 62.1 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Cairns in May?
- Cairns has a mean US Air Quality Index of about 24 in May.