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Gros Islet Weather in December
December in Gros Islet sees daytime temperatures around 29°C (84°F) and lows of 25°C (77°F) at night. With around 63 mm (2.5 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Gros Islet in December
Typically, you can expect about 18 days of rain this month, with 63 mm (2.5 in) on average. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Gros Islet in December
Gros Islet has excellent weather in December, with days reaching 29°C (84°F) and nights cooling to 25°C (77°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Gros Islet in December
There are approximately 247 hours of sunshine this month, resulting in mostly clear days.If you're a fan of comfortable temperatures and drier conditions, December is a great time to visit.
Gros Islet Temperature in December
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
59%
Precipitation
63 mm (2.5 in)
Rainy days
18 days
Humidity
82% *
Sunshine
247 hours *
Percentage Sunshine
*
* Data from: Saint Lucia, Saint Lucia (8 KM, 5 Miles).
Gros Islet Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gros Islet - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gros Islet typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in December
Historical weather records for Gros Islet in December
Browse day-by-day weather records for Gros Islet spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gros Islet historical weather extremes in December
The extremes listed below come from historical weather data collected in Gros Islet from 1992 through 2025.
- On December 8, 2021, temperatures climbed to 33°C (91°F), marking the warmest December day on record.
- The lowest daytime temperature in December was 26°C (79°F), recorded on December 30, 2018.
- Gros Islet registered its coldest December night on December 17, 1992, with temperatures dropping to 16°C (61°F).
Best Places in Saint Lucia in December
Find out more about the weather in Saint Lucia and which places have the best travel conditions in this month. See all of Saint Lucia in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Gros Islet in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Gros Islet in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming9/10 -
Cycling8/10 -
Walking8/10 -
Camping8/10 -
Outdoor sports8/10
Gros Islet 3-Day Forecast
More climate data for Gros Islet
Temperature Rainfall Sunshine Humidity
See the full Gros Islet climate overview or explore weather in Saint Lucia.
Popular in December
Where to go in December - average daytime high across popular destinations.
Laborie
29°C (84°F) Rodney Bay Village29°C (84°F) Gros Islet29°C (84°F) Castries30°C (86°F) Soufrière29°C (84°F) Marigot Bay30°C (86°F) Cap Estate29°C (84°F) Vieux Fort29°C (84°F) Bucket list
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