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Contents
- The climate of Jolly Harbour
- The best time to visit Jolly Harbour
- The worst time to visit Jolly Harbour
- Spring weather in Jolly Harbour
- Summer weather in Jolly Harbour
- Autumn weather in Jolly Harbour
- Winter weather in Jolly Harbour
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
The climate of Jolly Harbour
Situated in the tropical zone of Antigua and Barbuda, Jolly Harbour is dominated by an Af tropical climate, as classified by Köppen. The tropical rainforest biozone promises consistently high temperatures and frequent bouts of rainfall.
Throughout the year, the climate in Jolly Harbour remains fairly stable with minor fluctuations. Average high temperatures range from 28°C (82.4°F) to a peak of 31°C (87.8°F), while lows hover from 22°C (71.6°F) to 25°C (77°F). With warm coastal waters, sea temperatures vary from 26°C (78.8°F) to 29°C (84.2°F), inviting for swimming and water sports.
Rainfall varies markedly over the year, with the wettest month registering 140mm (5.51") compared to milder months with 37mm (1.46"). The number of rainy days rises from 11 to 17 each month, indicating a distinctly wet climate. Solar insolation follows a consistent path, with daylight hours varying from 11.1 to 13.1 hours per day and sunshine from 7 hours to 8 hours daily. The UV index is high to extreme throughout the year, from 8 at its lowest to a peak of 12.
The most significant weather events are the enhanced precipitation patterns from August through November, when rainfall exceeds 100mm (3.94") per month. This period also marks the peak rainy days, coinciding with the region's tropical monsoon pattern.
Throughout the year, the climate in Jolly Harbour remains fairly stable with minor fluctuations. Average high temperatures range from 28°C (82.4°F) to a peak of 31°C (87.8°F), while lows hover from 22°C (71.6°F) to 25°C (77°F). With warm coastal waters, sea temperatures vary from 26°C (78.8°F) to 29°C (84.2°F), inviting for swimming and water sports.
Rainfall varies markedly over the year, with the wettest month registering 140mm (5.51") compared to milder months with 37mm (1.46"). The number of rainy days rises from 11 to 17 each month, indicating a distinctly wet climate. Solar insolation follows a consistent path, with daylight hours varying from 11.1 to 13.1 hours per day and sunshine from 7 hours to 8 hours daily. The UV index is high to extreme throughout the year, from 8 at its lowest to a peak of 12.
The most significant weather events are the enhanced precipitation patterns from August through November, when rainfall exceeds 100mm (3.94") per month. This period also marks the peak rainy days, coinciding with the region's tropical monsoon pattern.
The best time to visit Jolly Harbour
Favourable weather conditions for visiting Jolly Harbour occur between December and April. During this period, the region experiences temperatures from 28°C (82.4°F) to 30°C (86°F) and reduced rainfall, with an average of 35mm (1.38") to 67mm (2.64"). The sea temperature stays around a comfortable 26°C (78.8°F) to 27°C (80.6°F), ideal for numerous water activities. Daylight averages 11.2 to 12.5 hours, permitting long days of exploration and activity, while the sun shines for about 8 hours per day.
The worst time to visit Jolly Harbour
Jolly Harbour experiences its most challenging weather conditions from August to November. During this time, rainfall can reach up to 140mm (5.51") with average rainfall days hitting 17. High temperatures, although not extremely high, ranging between 30°C (86°F) to 31°C (87.8°F), combined with high humidity resulting from the heavy rainfall, can make this period less appealing for tourists.
Spring weather in Jolly Harbour
The spring months of March through May bring rising temperatures to Jolly Harbour. Expect temperatures from 28°C (82.4°F) to 30°C (86°F) during these months. Rainfall begins to increase from March's 40mm (1.57") to May's 91mm (3.58"), while daylight extends from 12.1 hours to 12.9 hours. The UV index also starts to rise, reaching 12 in May, indicating a need for sun protection while outdoors during this period.
Summer weather in Jolly Harbour
Summertime in Jolly Harbour, from June through August, is characteristically wet and hot. Temperatures can reach as high as 31°C (87.8°F) with the sea temperatures also peaking at a warm 28°C (82.4°F). Rainfall intensifies during this period, increasing from 70mm (2.76") in June to 124mm (4.88") in August. The number of rainy days also escalates from 14 in June to 16 in August. Despite the rain, sunlight endures for approximately 8 hours a day, beneath a UV index of 12.
Autumn weather in Jolly Harbour
Autumn in Jolly Harbour spans from September to November, and conditions remain relatively summer-like. With temperatures fluctuating between 30°C (86°F) to 29°C (84.2°F), sea temperatures stand at a warm 29°C (84.2°F) in September and drop slightly to 28°C (82.4°F) by November. Rainfall reaches its peak in September and October, averaging at 140mm (5.51") and 134mm (5.28"), respectively. Sunshine hours start to reduce to 7 hours per day in September, despite the daylight remaining above 11 hours throughout the season.
Winter weather in Jolly Harbour
Wintertime, from December through February, is a quieter period in terms of rainfall for Jolly Harbour. Temperatures range from 28°C (82.4°F) in December and February to 29°C (84.2°F) in January. The sea temperature remains a comfortable 26°C (78.8°F) to 27°C (80.6°F) during this period. Rainfall lessens to 67mm (2.64") in December and reaches its lowest at 37mm (1.46") in February. With daylight hours between 11.1 and 11.6, and sunshine hours at 7 to 8 per day, winter in Jolly Harbour is warm, dry and pleasantly sunny.
Weather in January
In January, Jolly Harbour, Antigua and Barbuda starts the year bathed in sunlight, boasting an average of 8 hours of sunshine per day. The region experiences tropical climatic conditions, which broaden the possibility of outdoor activities. Weather in January »
Weather in February
February carries forward the warmth of January in Jolly Harbour, with balmy breezes adding to its charm. A tropical Valentine's day is very much on the cards as the romantic walks can extend into the night thanks to the warm temperatures. Weather in February »
Weather in March
As March arrives, the weather conditions in Jolly Harbour undergo subtle changes. While the average temperatures slightly escalate, the days grow fairly longer. It marks the transition to a lighter and brighter season in the tropical paradise. Weather in March »
Weather in April
The weather in April in Jolly Harbour ascends into a more typical tropical ambiance. Along with increased daylight hours, the sea temperature continues to urge residents and tourists to hit the beach. Some minor changes in the seasonality of weather patterns occur, with April representing the midway point in terms of transitioning from the drier to wetter months. Weather in April »
Weather in May
In May, Jolly Harbour welcomes summer with open arms. The daylight hours reach their peak, creating longer days to soak up the Caribbean sun. The enhanced warmth of the weather extends into the evenings, with nights remaining pleasantly warm. Weather in May »
Weather in June
Weather in June takes a typical tropical turn in Jolly Harbour. Longer sunny days, coupled with slightly increased rainfall, characterize the month. The beach-side fun continues with sea temperatures reaching their annual height. Even with an increase in rainfall, the prevalence of sunshine creates a unique blend of weather conditions typical of the tropical climate. Weather in June »
Weather in July
July, in Jolly Harbour, presents the essence of tropical summer. The month marks the arrival of peak tourist season with warm temperature, clear skies and ample daylight hours. At the beach, the warm sea temperature invites both locals and visitors for a dip. Weather in July »
Weather in August
The full swing of summer continues in Jolly Harbour throughout August. The month provides similar warm temperatures as the previous month while the day length starts to slightly contract. The marked increase in precipitation identifies August as one of the wettest months of the year. Weather in August »
Weather in September
September continues the pattern of Antigua's typical tropical weather, slightly reducing the length of daylight. Despite the transition into the latter part of the year, the sea temperature remains high promoting beach activities. Weather in September »
Weather in October
October sees a shift in Jolly Harbour's weather, as daylight hours gradually decline, indicating the onset of shorter days. Temperatures remain favourable for outdoor activities while a dip in sea temperature marks a slight change in the aquatic landscape. Weather in October »
Weather in November
November witnesses a decrease in temperature, rainfall, and daylight in Jolly Harbour. Even so, the weather remains warm in comparison to several other regions witnessing winter season. The drop in sea temperature continues the cooling trend in the marine environment. Weather in November »
Weather in December
December in Jolly Harbour brings with it a festive spirit along with a mild weather pattern. It retains enough daylight to enjoy the outdoors while the evenings become slightly cooler. The end of the year offers a blend of pleasantly warm afternoons and cooler nights. Weather in December »
Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Jolly Harbour?
In Jolly Harbour, the coldest period comes during January and February, when the average high-temperature touches 28°C (82.4°F).
How much does it rain in Jolly Harbour?
Throughout the year, in Jolly Harbour, there are 180 rainfall days, and 1040mm (40.94") of precipitation is accumulated.
What are the months with the coldest sea water in Jolly Harbour?
January through April, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.
What are the months with the most sunshine in Jolly Harbour?
The months with the most sunshine are January through August, with an average of 8h of sunshine.
What is the month with the lowest UV index in Jolly Harbour?
January and December, with an average maximum UV index of 8, are months with the lowest UV index.
What is the driest month in Jolly Harbour?
The month with the least rainfall in Jolly Harbour is February, when the rain falls for 13 days and typically collects 37mm (1.46") of precipitation.
What is the month with the highest UV index in Jolly Harbour?
The months with the highest UV index are March through September, with an average maximum UV index of 12.
When are the longest days in Jolly Harbour?
The month with the longest days is June, with an average of 13h and 6min of daylight.
What month is the hottest in Jolly Harbour?
The warmest period in Jolly Harbour, Antigua and Barbuda, with an average high-temperature of 31°C (87.8°F), falls in July through September.
What is the wettest month in Jolly Harbour?
September is the month with the most rainfall in Jolly Harbour, Antigua and Barbuda. Rain falls for 17 days and accumulates 140mm (5.51") of precipitation.
When is the sea warmest in Jolly Harbour?
With an average sea temperature of 29°C (84.2°F), September is the month with the warmest seawater in Jolly Harbour.
What is the month with the least sunshine in Jolly Harbour?
September through December, with an average of 7h of sunshine, are months with the least sunshine in Jolly Harbour, Antigua and Barbuda.
What is the month with the shortest days in Jolly Harbour?
December has the shortest days of the year in Jolly Harbour, with an average of 11h and 6min of daylight.
Is there Daylight Saving Time (DST) in Jolly Harbour?
Jolly Harbour does not observe Daylight Saving Time (DST). AST timezone is used over the entire year.
Average temperature
Jolly Harbour, Antigua and Barbuda
The warmest months (with the highest average high temperature) are July, August and September (31°C).
The months with the lowest average high temperature are January and February (28°C).
The months with the highest average low temperature are June, July, August and September (25°C).
The coldest months (with the lowest average low temperature) are January, February and March (22°C).
Average rainfall
Jolly Harbour, Antigua and Barbuda
The wettest month (with the highest rainfall) is September (140mm).
The driest month (with the least rainfall) is February (37mm).
Average rainfall days
Jolly Harbour, Antigua and Barbuda
- Average rainfall days in January:
16 days - Average rainfall days in February:
13 days - Average rainfall days in March:
12 days - Average rainfall days in April:
11 days - Average rainfall days in May:
14 days - Average rainfall days in June:
14 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
16 days - Average rainfall days in September:
17 days - Average rainfall days in October:
17 days - Average rainfall days in November:
17 days - Average rainfall days in December:
17 days
The months with the highest number of rainy days are September, October, November and December (17 days).
The month with the least rainy days is April (11 days).
Average sea temperature
Jolly Harbour, Antigua and Barbuda
The best month for swimming (with the highest average sea temperature) is September (29°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (26°C).
Average daylight / Average sunshine
Jolly Harbour, Antigua and Barbuda
- Average daylight in January:
11h and 1min - Average daylight in February:
11h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 3min - Average daylight in May:
12h and 5min - Average daylight in June:
13h and 1min
- Average daylight in July:
13h and 0min - Average daylight in August:
12h and 4min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 2min - Average daylight in December:
11h and 1min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 6min).
The months with the most sunshine are January, February, March, April, May, June, July and August (Average sunshine: 8h).
The months with the least sunshine are September, October, November and December (Average sunshine: 7h).
Average UV index
Jolly Harbour, Antigua and Barbuda
The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The months with the lowest UV index are January and December (UV index 8).
Jolly Harbour, Antigua and Barbuda
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