Port Moresby weather in December
December in Port Moresby: sweltering, rainy, with clean air — a good time to visit.
#7 of 12 months in Port Moresby · #376 of 604 destinations to visit in December · comfort 65/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Port Moresby climate normals — December
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 137 mm / 5.4 in | 🌧 rainy |
| Rainy days | 20 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 12.7 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Port Moresby in December — FAQ
- Is December a good time to visit Port Moresby?
- December in Port Moresby: sweltering, rainy, with clean air — a good time to visit. It ranks #7 of 12 months for Port Moresby on SeasonMap's comfort score (65/100).
- What is the weather like in Port Moresby in December?
- In December, Port Moresby averages a daily high of 30.9°C and a low of 24.1°C, with about 136.7 mm of rain over roughly 20.4 rainy days.
- What is the air quality in Port Moresby in December?
- Port Moresby has a mean US Air Quality Index of about 37 in December.