Saint Thomas weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: December – April
What is the weather like in Saint Thomas in December?
In December, Saint Thomas is warm: daytime highs average 26 °C, and even at night it stays warm at around 25 °C. The sea averages 27.4 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 48 mm in total. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, December is an excellent month for a holiday in Saint Thomas.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 69 | 80 | 85 |
| Day | 27° | 26° | 26° |
| Night | 26° | 25° | 25° |
| Sea | 28° | 27° | 27° |
| Sun | 8 h | 8 h | 8 h |
| Rain days | 16 | 12 | 10 |
More details for December
- Daylight
- 11 h 2 min06:44 – 17:46
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 30 km/haverage daily peakAll months
- Cloud cover
- 35 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−4America/St_Thomas
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %83 %
- Few rainy daysweight 30 %43 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
- Windproof jacket
Saint Thomas in December: quick answers
Is Saint Thomas hot in December?
Warm rather than hot: in December, daytime highs in Saint Thomas average 26 °C and nights cool to about 25 °C.
Can you swim in Saint Thomas in December?
Yes. In December the sea averages 27.4 °C – lovely and warm for swimming.
Does it rain much in Saint Thomas in December?
Rain is frequent, with about 12 rainy days and 48 mm in total.
Saint Thomas month by month
The whole year in Saint ThomasAll destinations: U.S. Virgin IslandsCaribbean weather in DecemberWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences