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Alotau Weather by Month
Average temperatures, rainfall and humidity for Alotau, Papua New Guinea, month by month, built from OpenWeather’s historical records. Use it to see what a typical Alotau month looks like before you travel — then check the live Alotau forecast for the days ahead.
Warmest month
December
31°C average high
Coolest month
August
23°C average low
Wettest month
January
128 mm of rain
Driest month
July
16 mm of rain
Average temperature and rainfall in Alotau by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 31°C | 25°C | 22°C / 35°C | 128 mm | 83% | 13 km/h |
| February | 31°C | 25°C | 22°C / 38°C | 80 mm | 83% | 14 km/h |
| March | 30°C | 24°C | 20°C / 34°C | 123 mm | 84% | 12 km/h |
| April | 30°C | 24°C | 18°C / 39°C | 66 mm | 85% | 12 km/h |
| May | 30°C | 25°C | 20°C / 39°C | 42 mm | 85% | 16 km/h |
| June | 29°C | 24°C | 16°C / 33°C | 19 mm | 86% | 20 km/h |
| July | 29°C | 23°C | 19°C / 32°C | 16 mm | 83% | 20 km/h |
| August | 29°C | 23°C | 15°C / 33°C | 17 mm | 83% | 20 km/h |
| September | 29°C | 24°C | 15°C / 33°C | 25 mm | 84% | 20 km/h |
| October | 29°C | 24°C | 15°C / 39°C | 32 mm | 85% | 17 km/h |
| November | 31°C | 25°C | 16°C / 36°C | 29 mm | 82% | 14 km/h |
| December | 31°C | 25°C | 20°C / 39°C | 58 mm | 81% | 12 km/h |
Best time to visit Alotau
The most comfortable time to visit Alotau is generally July to September, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around January, totalling about 635 mm a year.
Travellers who prefer heat should aim for December, when highs average 31°C. January is the month to avoid if rain would spoil your plans — it averages 128 mm, roughly 8× the rainfall of the driest month (July).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Alotau forecast for what is happening now.
