Monthly climate guide

Apia weather in September

With highs near 28°C (83°F) and lows around 26°C (79°F), September feels hot in Apia. Rainfall averages about 74 mm (some rain) and the sky is a mix of sun and cloud. Daytime highs are about the same as August and about the same as October.

What stands out in September

Skies are at their clearest this time of year.
It's one of the drier stretches of the year in Apia.
Humidity near 79% makes 28°C feel stickier than it sounds.
There's little difference between day and night (around 2°C).

Avg high

28°C

83°F

Avg low

26°C

79°F

Rainfall

74 mm

some rain

Humidity

79%

relative

Sky

51%

cloud · a mix of sun and cloud

Live Apia forecast Where else to go in September

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Apia weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in Apia
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	28°C / 83°F	27°C / 81°F	296 mm	81%	79%
February	28°C / 83°F	27°C / 81°F	270 mm	81%	82%
March	28°C / 83°F	27°C / 81°F	167 mm	80%	72%
April	29°C / 83°F	27°C / 81°F	186 mm	81%	66%
May	28°C / 83°F	27°C / 81°F	132 mm	81%	61%
June	28°C / 82°F	27°C / 80°F	94 mm	81%	59%
July	28°C / 82°F	26°C / 79°F	88 mm	80%	57%
August	28°C / 82°F	26°C / 79°F	65 mm	79%	58%
September	28°C / 83°F	26°C / 79°F	74 mm	79%	51%
October	28°C / 83°F	27°C / 80°F	147 mm	79%	64%
November	28°C / 83°F	27°C / 80°F	227 mm	81%	69%
December	28°C / 83°F	27°C / 81°F	248 mm	81%	77%

What to pack for September

Light, breathable clothing (cotton or linen)
A sun hat and high-SPF sunscreen
A refillable water bottle
A compact umbrella or packable rain jacket
Water-resistant shoes
Quick-dry fabrics — it feels stickier than the temperature suggests

Full season-by-season packing guide →

Is September a good time to visit Apia?

Compare the months in the chart above to find your ideal window.

Best time to visit Apia →

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Apia weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/samoa/apia/september

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Apia in September: quick answers

Is September a good time to visit Apia?

Yes. September is one of the best months for Apia, with highs around 28°C and about 74 mm of rain.

How warm is Apia in September?

Average highs are about 28°C (83°F) and average lows about 26°C (79°F), based on 10 years of daily data.

Does it rain a lot in Apia in September?

Apia typically gets around 74 mm of rain in September — some rain.

Figures are long-term averages for the area around Apia (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.