Weather in Grenada in December

How December compares

December is the 10th warmest month of the year in Grenada and ranks 26th of 134 destinations we compare for December - see where else is hot in December. Against London's average high of 7.7°C in December, Grenada is 19.4°C warmer by day and 22.6°C warmer at night.

Daytime and night-time in December

The typical December day in Grenada peaks at 27.1°C, but that is an average: the warmest 10% of days reach 27.8°C or more. About 100% of days top 25°C. Nights average 25.3°C; one night in ten drops to 24.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest December day here reached 28.9°C (2019-12-03) and the coldest night 22.8°C (1994-12-29).

Rain in December

Wet (more than 8 rainy days): about 16 days with 1 mm or more, 79 mm in total. Year to year it varies a lot - the wettest December was 2017 with 191 mm, the driest 1997 with 19 mm. Humidity averages 79%.

Sea temperature in December

The sea averages 27.8°C - warm enough to swim (22°c+). Depending on the year it ranges from 27.4°C to 28.1°C. For the warmest sea here, come in September (29.2°C).

Sunshine and daylight

Around 6.2 hours of sunshine a day (estimated from cloud cover), 11.3 hours of daylight: the sun rises about 06:19 and sets about 17:45 local time in mid-December. Average cloud cover is 45%.

Is December a good time to visit Grenada?

It is a reasonable choice: hot days but expect showers. The best months for Grenada on our scoring are March, February, April; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Warm days, with little relief at night

Grenada feels very different from London in December: its average daytime high is 19.4°C warmer. Yet December is towards the cooler end of Grenada’s own calendar, so this is hot holiday weather without the island’s highest average temperatures. Humidity is 79%, which can make the warmth feel heavier than the thermometer suggests, particularly when you are active. Pack loose, breathable clothes and plan opportunities for shade around midday. With average night temperatures of 25.3°C, evenings are not much cooler than afternoons. If you struggle to sleep in humid warmth, prioritise accommodation with effective cooling rather than expecting an open window to provide much relief.

Plan for rain, not a washout

The catch is the frequency of rain: about 16 days have at least 1 mm, so a completely dry holiday is not a sensible expectation. That does not mean those days are wet throughout. Average sunshine is about 6.2 hours within 11.3 hours of daylight, leaving a useful balance of sun and less sunny periods rather than clear skies all day. Keep outdoor plans flexible and carry a light waterproof that will not feel too heavy in the humidity. December suits travellers who can work around wet weather; it is less convincing for anyone who would find regular rain a major disappointment.