Climate averages 1991–2020
Apia weather
in December.
A hot, very wet month: the 5th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Apia: daytime highs average 29.4°C and nights cool to about 25.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 346 mm of rain on roughly 27 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 55 min on an average December day.
From December to January, average highs rise by 0.1°C to 29.5°C, and monthly rainfall rises from 346 mm to 360 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Apia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.5°C25.5°C | 25.5°C | 360 | 27.8 | 12.813 h |
| February | 29.5°C25.5°C | 25.5°C | 328 | 24.8 | 12.613 h |
| March | 29.7°C25.5°C | 25.5°C | 271 | 27.3 | 12.212 h |
| April | 29.7°C25.6°C | 25.6°C | 218 | 25.5 | 11.812 h |
| May | 29.1°C25.5°C | 25.5°C | 207 | 24.4 | 11.511 h |
| June | 28.6°C25.4°C | 25.4°C | 143 | 21.9 | 11.311 h |
| July | 28.3°C25.0°C | 25.0°C | 138 | 21.0 | 11.411 h |
| August | 28.5°C24.9°C | 24.9°C | 121 | 21.0 | 11.712 h |
| September | 28.9°C25.0°C | 25.0°C | 160 | 21.9 | 12.012 h |
| October | 29.1°C25.1°C | 25.1°C | 226 | 25.0 | 12.412 h |
| November | 29.3°C25.3°C | 25.3°C | 271 | 25.8 | 12.713 h |
| December, selected | 29.4°C25.4°C | 25.4°C | 346 | 27.4 | 12.913 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Apia) is explained once on the Apia year overview and on the Sources, method and limits page.