St Mary in December averages 28°C (82°F) during the day and 23°C (73°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April and December typically offer the best weather for St Mary.
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Pick a month to see the average temperature, rainfall and sunshine in St Mary - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in St Mary typically stay consistent throughout December, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 25°C (77°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for St Mary spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in St Mary between 2003 and 2025, these are the recorded extremes during December.
Find out more about the weather in Jamaica and which places have the best travel conditions in this month. See all of Jamaica in December →
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).
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full St Mary climate overview or explore weather in Jamaica.
Where to go in December - average daytime high across popular destinations.
Treasure Beach
29°C (84°F) Runaway Bay28°C (82°F) Montego Bay29°C (84°F) Ocho Rios28°C (82°F) Kingston28°C (82°F) Negril29°C (84°F) Port Antonio27°C (81°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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