Jamaica

• Jamaica’s tropical climate keeps coastal temperatures consistently warm year-round, typically ranging from 22°C to 31°C (72°F to 88°F).
• The dry season (December to April) brings slightly cooler, less humid conditions, while the wet season (May to November) is hotter and muggier, with a heightened chance of tropical storms.
• Inland elevations, especially the Blue Mountains, offer a notably cooler escape, with evening temperatures often dipping to around 15°C (59°F).

Jamaica’s air temperature story is one of steady warmth, shaped by its position deep in the Caribbean Sea. The island sits just south of the Tropic of Cancer, which means it experiences a classic tropical maritime climate. Daytime highs along the coast almost always land between 28°C and 31°C (82°F to 88°F), while nights rarely slip below 22°C (72°F). This narrow temperature band, as the WeatherBox temperature map illustrates, makes the coastline a sunseeker’s draw in any month. Cooling trade winds, known locally as the “doctor breeze,” temper the heat, especially along the north shore. The biggest contrast isn’t between summer and winter, but between the dry season and the wet season. Even then, the differences in temperature are modest; the greater shift is in humidity and rainfall, which can make the air feel heavier and stickier from late spring into autumn.

While coastal areas share this tropical uniformity, Jamaica’s topography carves out meaningful microclimates. The north coast resorts of Montego Bay and Ocho Rios sit squarely in the path of the trade winds, receiving more rainfall and often feeling slightly fresher during the dry months. The south coast around Treasure Beach and Kingston, tucked in the rain shadow of the Blue Mountains, tends to be hotter and drier, with midday temperatures occasionally pushing a degree or two higher under blazing sun. The most dramatic change arrives with altitude. In the cooler highlands, such as the misty Blue Mountain coffee-growing region, average temperatures fall by roughly 1°C for every 200 metres of elevation gain. Mornings there can be crisp enough for a light fleece, and overnight readings near 15°C (59°F) are common. The WeatherBox temperature map reveals this inland cool patch clearly, a welcoming contrast to the sun-drenched rhythms of the palm-fringed coast.

For most travellers, the dry season from December to April offers the most favourable window. Skies stay clearer, humidity drops, and the steady trade winds keep afternoons along the powdery sands of Negril or the coral cliffs of the west coast delightfully comfortable. This is the peak tourist period, so beaches and attractions feel livelier. The wet season from May to November brings higher mugginess and afternoon downpours, but also lush, emerald landscapes and thinner crowds. July and August remain busy summer holiday months, though the air can feel thick and rain showers arrive more abruptly. September and October carry the greatest tropical storm risk, a factor worth considering when planning. Packing smartly means light, breathable fabrics, sturdy sandals, a wide-brimmed hat, and high-factor sunscreen year-round; a packable rain jacket or umbrella is a wise addition outside the dry months. For deeper temperature details, month-by-month averages, and regional maps, explore WeatherBox and let the data help you find your ideal stretch of Caribbean sun.

• Jamaica’s climate is dominated by the tropical savanna (Aw) zone along the south coast and tropical rainforest (Af) in the northeast, with a small temperate highland area (Cfb) in the Blue Mountains.
• The island’s central mountain range and persistent northeast trade winds create a sharp rain shadow, making the south coast much drier and sunnier than the lush, rain-soaked northern and eastern slopes.
• Hurricane season runs from June to November, bringing humid, stormy weather, while the dry season from December to April delivers the most settled beach conditions, particularly on the south and west coasts.

Jamaica sits at about 18° north latitude, surrounded by the warm Caribbean Sea, so the entire island enjoys a tropical maritime climate with steady temperatures and stubbornly high humidity. Most of the coast and interior lowlands fall under the tropical savanna (Aw) classification, meaning there is a pronounced dry season in winter and early spring. However, the northeast slopes and the parish of Portland, directly hit by moisture-laden trade winds, slip into the tropical rainforest (Af) zone with no true dry month. The highest peaks of the Blue Mountains exceed 2,000 metres and cool enough to reach the temperate highland (Cfb) class, where afternoon clouds regularly shroud the coffee-growing slopes. On our WeatherBox charts, you can see how temperatures hover around 26°C to 32°C (79°F to 90°F) year-round at sea level, while overnight lows in the highlands can dip to a refreshing 10°C to 15°C (50°F to 59°F).

Geography wields a heavy hand here. The island’s mountainous backbone forces the trade winds upward, wringing out abundant rainfall on the north coast and the Blue Mountains. Port Antonio and the surrounding rainforests receive well over 2,000 mm (80 inches) of rain annually, keeping the landscape dazzlingly green. In stark contrast, the south coast around Kingston and the palisadoes spit sits in a pronounced rain shadow, often tallying less than 800 mm (31 inches) a year, with a semi-arid character in some pockets. This means Negril and Montego Bay enjoy long stretches of gloriously clear skies during the winter dry season, while places like Ocho Rios can still see brief, heavy afternoon downpours even in the drier months. The wet season peaks from May to October, when humidity soars and afternoon thunderstorms become a near-daily ritual. Late summer and autumn also bring the highest risk of hurricanes or tropical storms, with September and October historically the busiest months for rough seas and flooding rains.

Travel planning leans heavily on these seasonal rhythms. The dry season from December to April is the most popular window, delivering plenty of sunshine and low rainfall on the south and west coasts, ideal for lounging on the dazzling Seven Mile Beach or exploring Kingston’s open-air markets. The north coast stays damp but beautifully lush, so a raincoat or sturdy umbrella is still a wise packing choice. From June onward, the island shifts into its hot, sticky rainy season, and while hotel rates drop and crowds thin, you will need tolerance for sudden tropical downpours and high humidity. If you are chasing waterfalls or the moody, mist-shrouded beauty of the Blue Mountains, the wet season actually amplifies the drama. Pack light, breathable fabrics, reef-safe sunscreen, and a dry bag for electronics regardless of the season. A light fleece or sweater is essential if you plan overnight stays in the cool highlands. WeatherBox’s climate maps and monthly dashboards let you compare rainfall and sunshine hours across parishes, helping you pick a coastline that matches your weather comfort zone.