Monthly weather forecast and climate
Antigua and Barbuda

Flag of Antigua and Barbuda
Flag of Antigua and Barbuda

The climate of Antigua and Barbuda

Antigua and Barbuda has a tropical marine climate (Köppen climate classification Aw), with predominantly hot and humid conditions throughout the year. Moist trade winds pass over the warm seas much through the year and regulate the temperatures. Antigua and Barbuda is a sovereign state in the Leeward Islands of the Lesser Antilles area of the Caribbean region. The island country lies in the eastern arc of the Caribbean that separates the Caribbean Sea from the Atlantic Ocean. Antigua lies 39 miles south of Barbuda, 35 miles northeast of Redonda Island, and 406 miles southeast of the United States territory of Puerto Rico. The tropical location, trade winds, and the proximity to the Caribbean Sea and the Atlantic Ocean influence the climate.

Antigua and Barbuda lies on the arc that forms the easternmost boundary of the Caribbean Sea with the North Atlantic Ocean. The island country's location at 17°N of the equator blesses it with bright sunshine and an equal duration of days and nights. Several small islands and islets are part of the Commonwealth. The terrain is mostly low-lying, with limestone and coral formations, and some high volcanic areas. Limestone formations dominate the north, followed by a central clay plain, and volcanic area in the south. Beaches, lagoons, and natural harbors abound the coastlines of the islands. Reefs and shoals surround the significant part of the islands. The islands have no rivers and lack sources of freshwater except for small streams and reservoirs. Boggy Peak, a volcanic crater, is the highest point in Antigua and Barbuda at 402 meters above sea level.

Antigua and Barbuda has two primary seasons. The dry season is from January to May and the wet season runs from June to December. The average daily temperature rises from a low of 25°C (77°F) in January to a high of 28.1°C (82.6°F) in August. Summers are wet, hot, and humid. The average high temperatures reach 31.1°C (88°F) between June to August, but temperatures above 33.3°C (91.9°F) are rare. The skies remain cloudy for more than 60% of the time. Winters are cool to warm and relatively dry, with the average low temperatures at 22.2°C (72°F) in January. The northeastern trade winds begin to blow strongly and push down the humidity levels and the heat index. The average daily wind speeds clock in the range of 19.3km/h (12mph) to 29km/h (18mph) throughout the year and is the highest in July. Wind direction remains predominantly from the east. Hurricanes pass over the islands in the wet season.

Antigua and Barbuda receives an annual average rainfall of a moderate 990.6mm (39"). Saint John's, the capital of Antigua, receives 1041.4mm (41") of precipitation in 125 wet days in the year. Codrington, the capital of Barbuda, registers 939.8mm (37") of rainfall in 120 wet days annually. The wettest period is from September to November, while the driest is from February to March. The rainy season from June to December contributes to 80% of the annual precipitation. The rainfall is mostly in the form of downpours or thunderstorms, sometimes intense, but rarely lasting for extended periods. The yearly sunshine is in the range of 2900 hours to 3000 hours, and the daily sunlight registers between 7 hours and 9 hours. The average relative humidity ranges from 68 to 78% and reaches its peak in August. The average seawater temperatures range between a mild 26.1°C (79°F) to a warm 28.9°C (84°F) and are suitable for swimming throughout the year.

The highest recorded temperature in Antigua and Barbuda is 34.9°C (94.8°F), set on August 12, 1995, in Saint John's. The record for the lowest temperature is 16.1°C (61°F), set on December 31, 1974, in Saint John's.

The best time to visit Antigua and Barbuda

The best time to visit Antigua and Barbuda is from January to April in the dry season. The period between the third week of January and the first week of February has the best conditions of the year, with many rainless days and temperatures between 18.3°C (64.9°F) and 32.2°C (90°F). Winds blow with moderate speeds of 19.3km/h (12mph) to 22.5km/h (14mph) to keep the atmosphere pleasant. The daily sunshine lasts for 8 hours, even during the coldest time of the year. Tropical storms are mostly absent in the dry season, and the seawaters are calm.

The worst time to visit Antigua and Barbuda

The worst time to visit Antigua and Barbuda is during the hot and humid summer from June to September. The sun's ultraviolet index reaches a peak of 12, and the sun rays emit dangerous radiations. The relative humidity reaches its peak, and the days remain muggy 100% of the time. The sticky atmosphere induces much sweat. Heavy rainfall amid thunderstorms and downpour poses a challenge for sunbathing or water-related activities. Tropical storms gather steam and add to the uncertainty of the weather.

Weather hazards

Antigua and Barbuda is prone to earthquakes, hurricanes, floods, and droughts. The islands are part of a volcanic arc in the Lesser Antilles in the eastern Caribbean. Tropical storms and anticyclones are frequent than hurricanes. Antigua and Barbuda lie outside the principal hurricane strike zone and mostly see category 1 or category 2 hurricanes. June to October accounts for one hurricane, on average, in the year. Hurricane Luis brought severe damage to Barbuda in 1995. Hurricane Irma damaged 95% of Barbuda's infrastructure with wind speeds over 297.7km/h (185mph) in September 2017. The collision of the South American and Caribbean Plates results in several low to moderate-intensity earthquakes. Thunderstorms and rainstorms are standard in the wet season. Droughts are frequent due to the lack of freshwater sources.

Weather in January

January is usually the coldest month of the year in Antigua and Barbuda, with average temperatures in the 22.2°C (72°F) to 27.8°C (82°F) zone. January ushers the transition to the dry season with average precipitation less than 55.9mm (2.2"). Weather in January »

Weather in February

February is the driest month of the year in Antigua and Barbuda, with less than 45.7mm (1.8") of rainfall and 9 wet days. The average temperatures are in the warm zone of 22.2°C (72°F) to 27.8°C (82°F), with warm daily sunshine of 8 hours. Weather in February »

Weather in March

March is a dry and sunny month in Antigua and Barbuda, with average precipitation less than 50.8mm (2"). The average temperatures register in the temperate zone of 22.8°C (73°F) to 28.9°C (84°F). The bright sunshine lasts for 8 hours every day, but the skies occasionally witness running clouds. Weather in March »

Weather in April

April is the last month of the dry season in Antigua and Barbuda before the rain gods take over. The averages precipitation is 71.1mm (2.8"), with light showers during 7 wet days in the month. Temperatures in Codrington are in the range of 23.9°C (75°F) to 28.9°C (84°F). Weather in April »

Weather in May

May transitions Antigua and Barbuda to the wet season, with a gradual increase in precipitation. The average temperatures are in the range of 25°C (77°F) to 30°C (86°F), with hot days amid 8 hours of daily sunshine. The daylight increases to 13 hours by May 31, with sunrise between 5.30 a.m. Weather in May »

Weather in June

June is the beginning of the hot and humid summer season in Antigua and Barbuda that sees average temperatures in the range of 25°C (77°F) to 31.1°C (88°F). The conditions become muggy, with the rise in humidity levels. Moisture-laden air makes the conditions sticky and induces much sweat. Weather in June »

Weather in July

July brings ample rain to Antigua and Barbuda, with at least 12 wet days in the month. The average temperatures are in the zone of 25°C (77°F) to 31.1°C (88°F), with bright sunshine of 8 hours every day. Potter's Village and Piggotts in the interior of Antigua are hotter by -17.2°C (1°F) to -16.7°C (1.9°F) than the coast. July 22 is the clearest day of the month, with bright skies for 52% of the time. Weather in July »

Weather in August

August is usually the hottest month of the year in Antigua and Barbuda, with the average temperatures in the zone of 26.1°C (79°F) to 31.1°C (88°F). The hot days typically end in warm and humid nights. The average relative humidity reaches a peak level of 78%. Mornings often scale to 90% stickiness and are the best times to swim in the seawaters that average 27.8°C (82°F) during the day. Weather in August »

Weather in September

September begins the wettest period of the year in Antigua and Barbuda. The precipitation increases substantially to average between 127mm (5") and 152.4mm (6") during 12 wet days in the month. Heavy downpour is evident, and the showers last for long periods. Weather in September »

Weather in October

October is the wettest month of the year in Antigua and Barbuda. The average precipitation is to the tune of 139.7mm (5.5") to 152.4mm (6") in the coastal regions and slightly lower in the interior and northern regions. The chance of a wet day in October looms between 31% and 36%, the highest of the year. Temperatures usually range between 23.9°C (75°F) to 30.6°C (87.1°F), with 7 hours of daily sunshine in most places. Weather in October »

Weather in November

November is wet in Antigua and Barbuda, with an average of 127mm (5") to 139.7mm (5.5") of rainfall. Temperatures usually range between 23.9°C (75°F) to 30°C (86°F), with humid conditions during most of the days. Nights are warm, with small temperature drops between midnight and sunrise. The showers moderate the heat for sometime before the heat index rises again. Weather in November »

Weather in December

December brings comfortable weather in Antigua and Barbuda, with a change in seasons. The transition to the dry season sees a significant drop in rainfall, which yields 76.2mm (3") to 88.9mm (3.5") of precipitation in the month. The decrease in heat registers the temperatures in the range of 22.8°C (73°F) to 28.9°C (84°F). Weather in December »
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