Grenada Weather Guide: Climate Patterns and Seasonal Trends

Grenada, the southernmost of the Windward Islands, is defined by a quintessential humid tropical climate. Positioned just 12 degrees north of the Equator, the island enjoys consistent warmth year-round, but its rugged volcanic topography creates significant diversity in how that weather is experienced. From the sun-drenched, arid coasts of the south to the misty, prehistoric rainforests of the interior highlands, the "Spice Isle" offers a variety of atmospheric moods dictated by elevation and the prevailing trade winds.

Seasonal Rhythm: Dry vs. Wet

Unlike temperate regions, Grenada does not have four seasons. Instead, the year is divided into two distinct periods: the Dry Season and the Rainy Season.

• The Dry Season (January to May): This is characterized by lower humidity and clear, sunny skies. While the sun is intense, the northeasterly trade winds—locally known as "Christmas Winds" during the early part of the year—provide a constant, refreshing breeze that prevents the heat from feeling stifling. February and March are typically the driest months, seeing as little as two inches of rain.
• The Rainy Season (June to December): Humidity rises, and the air becomes more "sultry." Rainfall typically occurs in short, intense bursts followed by rapid clearing and bright sunshine. November is statistically the wettest month. Despite the name, it rarely rains all day; instead, the island experiences liquid sunshine—brief interruptions in an otherwise warm day.

Daily Atmospheric Patterns

The climate in Grenada behaves with a predictable daily cadence. Most mornings begin bright and clear. As the sun heats the island, moisture evaporates from the lush interior, often leading to cloud buildup over the central mountains by midday. These clouds may release brief showers in the early afternoon before the sea breezes sweep them away, leading to clear, star-studded tropical evenings. Temperatures typically range from an early morning low of 75°F (24°C) to a midday high of 87°F (31°C).

Regional Microclimates

Grenada’s volcanic interior creates dramatic weather variations over very short distances:

• The Highlands: Sites like Grand Etang National Park are significantly cooler and wetter than the coast. The mountains act as rain traps, receiving up to 150 inches of rain annually. Here, you will experience "cloud forests" where mist frequently rolls through the trees, dropping temperatures by 5–10 degrees compared to the beach.
• The Southern Lowlands: The area around St. George’s and the Point Salines airport is much flatter and drier. This region receives roughly 40–50 inches of rain per year, making it the sunniest part of the island.
• The Sister Islands: Carriacou and Petite Martinique are lower in elevation and lack the high peaks of the main island. Consequently, they are much more arid and prone to drought, with a landscape that feels more Mediterranean or scrub-like than tropical rainforest.

Historical Context and Phenomena

Historically, Grenada was considered to be south of the primary Caribbean hurricane belt. However, significant events like Hurricane Ivan (2004) and Hurricane Beryl (2024) have reshaped the local perspective on weather resilience. The official hurricane season runs from June 1st to November 30th.

One specific phenomenon to note is the arrival of Saharan Dust. During the summer months, plumes of dust from the Sahara Desert can travel across the Atlantic, creating an atmospheric haze that softens the sun’s glare and produces spectacularly vibrant, orange sunsets, though it can also reduce air clarity.

Local Experience and Adaptation

Locals have a deep respect for the rain, often referring to it as "blessings," as it fuels the island's famous spice production (nutmeg, cocoa, and mace). You will notice that many traditional houses are built with steep roofs to shed heavy tropical downpours and are oriented to catch the cooling trade winds, reducing the need for artificial cooling. In the drier months, water conservation is a cultural priority, especially in the northern parishes and on the sister islands where rainwater harvesting is a vital way of life.