Climate averages 1991–2020

Apia weather
in January.

A hot, very wet month: the joint 3rd warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 29.5°C Daytime mean, January

Average low 25.5°C Night-time mean, January

Rainfall 360 mm 28 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

January is a hot month in Apia: daytime highs average 29.5°C and nights cool to about 25.5°C. By daytime temperature it is the joint 3rd warmest of the 12 months.

Expect about 360 mm of rain on roughly 28 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 50 min on an average January day.

From January to February, average highs rise by 0.1°C to 29.5°C, and monthly rainfall falls from 360 mm to 328 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages 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

1991–2020

Monthly climate averages for Apia, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	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	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 limits

How 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.