Monthly climate guide

São Tomé weather in May

With highs near 27°C (81°F) and lows around 27°C (80°F), May feels hot in São Tomé. Rainfall averages about 126 mm (wet) and the sky is often cloudy. Daytime highs are about the same as April and 2°C warmer than June.

What stands out in May

It's humid — around 85% — so the heat feels heavier.
Days and nights are close, only about 1°C apart.
Even after dark it stays around 27°C, so sleeping can feel warm.

Avg high

27°C

81°F

Avg low

27°C

80°F

Rainfall

126 mm

wet

Humidity

85%

relative

Sky

75%

cloud · often cloudy

Live São Tomé forecast Where else to go in May

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São Tomé weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in São Tomé
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	28°C / 82°F	27°C / 80°F	117 mm	82%	72%
February	28°C / 82°F	27°C / 81°F	131 mm	83%	80%
March	28°C / 83°F	27°C / 81°F	170 mm	82%	79%
April	28°C / 83°F	27°C / 81°F	173 mm	82%	78%
May	27°C / 81°F	27°C / 80°F	126 mm	85%	75%
June	26°C / 79°F	25°C / 77°F	45 mm	83%	73%
July	25°C / 77°F	24°C / 75°F	26 mm	82%	75%
August	25°C / 78°F	24°C / 76°F	23 mm	82%	76%
September	26°C / 79°F	25°C / 77°F	44 mm	82%	77%
October	27°C / 80°F	26°C / 79°F	122 mm	83%	79%
November	27°C / 80°F	26°C / 79°F	164 mm	85%	74%
December	27°C / 81°F	26°C / 79°F	130 mm	84%	72%

What to pack for May

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 May a good time to visit São Tomé?

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

Best time to visit São Tomé →

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São Tomé weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/sao-tome-and-principe/sao-tome/may

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São Tomé in May: quick answers

Is May a good time to visit São Tomé?

May is one of the wetter months in São Tomé, with about 126 mm of rain. You can still go: pack a rain jacket and keep plans flexible.

How warm is São Tomé in May?

Average highs are about 27°C (81°F) and average lows about 27°C (80°F), based on 10 years of daily data.

Does it rain a lot in São Tomé in May?

São Tomé typically gets around 126 mm of rain in May — wet.

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