Monthly climate guide

Gustavia weather in December

Expect hot weather in Gustavia in December: afternoons reach about 27°C (81°F), while nights drop to around 26°C (79°F). Around 39 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are about the same as November and about the same as January.

What stands out in December

Days and nights are close, only about 1°C apart.
It's humid — around 77% — so the heat feels heavier.
Outdoor swimming weather: around 27°C, mostly dry and sunny.
Even after dark it stays around 26°C, so sleeping can feel warm.

Avg high

27°C

81°F

Avg low

26°C

79°F

Rainfall

39 mm

fairly dry

Humidity

77%

relative

Sky

39%

cloud · a mix of sun and cloud

Live Gustavia forecast Where else to go in December

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Gustavia weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in Gustavia
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	26°C / 80°F	26°C / 78°F	16 mm	76%	36%
February	26°C / 79°F	25°C / 77°F	12 mm	76%	31%
March	26°C / 79°F	25°C / 77°F	16 mm	75%	38%
April	27°C / 80°F	26°C / 78°F	27 mm	76%	43%
May	28°C / 82°F	27°C / 80°F	71 mm	79%	59%
June	28°C / 83°F	27°C / 81°F	45 mm	79%	56%
July	29°C / 83°F	28°C / 82°F	56 mm	79%	50%
August	29°C / 84°F	28°C / 82°F	74 mm	79%	46%
September	29°C / 84°F	28°C / 82°F	90 mm	79%	54%
October	29°C / 84°F	28°C / 82°F	91 mm	78%	48%
November	28°C / 83°F	27°C / 81°F	84 mm	78%	47%
December	27°C / 81°F	26°C / 79°F	39 mm	77%	39%

What to pack for December

Light, breathable clothing (cotton or linen)
A sun hat and high-SPF sunscreen
A refillable water bottle
A small travel umbrella, just in case
Sunglasses
Quick-dry fabrics — it feels stickier than the temperature suggests

Full season-by-season packing guide →

Is December a good time to visit Gustavia?

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

Best time to visit Gustavia →

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Gustavia weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/saint-barthelemy/gustavia/december

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Gustavia in December: quick answers

Is December a good time to visit Gustavia?

December is a reasonable time for Gustavia: highs around 27°C and about 39 mm of rain, though not one of the three best months.

How warm is Gustavia in December?

Average highs are about 27°C (81°F) and average lows about 26°C (79°F), based on 10 years of daily data.

Does it rain a lot in Gustavia in December?

Gustavia typically gets around 39 mm of rain in December — fairly dry.

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