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Contents
- The climate of Mustique
- The best time to visit Mustique
- The worst time to visit Mustique
- Spring weather in Mustique
- Summer weather in Mustique
- Autumn weather in Mustique
- Winter weather in Mustique
- 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
Climate and monthly weather forecast
The climate of Mustique
Mustique, lying in the heart of the Caribbean, falls within the Köppen climate classification category of "Tropical Rainforest Climate," which remains largely consistent throughout the year. The Caribbean Island receives abundant rainfall and maintains a warm and humid temperature range reflective of this climate class. A close examination of the climate parameters unveils a high rainfall peak reaching 305mm (12.01") in July, with the least precipitation observed in February at 97mm (3.82"). This suggests a rainfall pattern predominantly concentrated in the summer months.
The temperature remains relatively consistent across the year with a slight rise from April, peaking at 30°C (86°F) in May, and maintaining this high until October before dipping to 28°C (82.4°F) in December. This warm trend is consistent even in the cooler months - with the lowest temperature of 21°C (69.8°F) seen in January and February. On the other hand, ocean temperature scales from 27°C (80.6°F) from January to April, and incrementally increases to a balmy 29°C (84.2°F) from August to October. Amid these conditions, UV index consistently stands above the high-exposure limit, heightening from March to October.
The temperature remains relatively consistent across the year with a slight rise from April, peaking at 30°C (86°F) in May, and maintaining this high until October before dipping to 28°C (82.4°F) in December. This warm trend is consistent even in the cooler months - with the lowest temperature of 21°C (69.8°F) seen in January and February. On the other hand, ocean temperature scales from 27°C (80.6°F) from January to April, and incrementally increases to a balmy 29°C (84.2°F) from August to October. Amid these conditions, UV index consistently stands above the high-exposure limit, heightening from March to October.
The best time to visit Mustique
Given the tropical rainforest climate of Mustique, the best time to visit depends fundamentally on personal preference for temperature and rainfall. However, for those seeking a balance between warm temperatures and lesser rainfall, February emerges as a potential choice. This month records the lowest rainfall at 97mm (3.82") spread over 12 days, combined with comfortable temperatures from 21°C (69.8°F) to 27°C (80.6°F). Moreover, the daylight hours stretching to 11.7 hours and sea temperatures averaging at 27°C (80.6°F) also contribute to more enjoyable outdoor activities and beach visits.
The worst time to visit Mustique
The worst time to visit Mustique would be during the height of the summer season, most notably July and October. During these months, Mustique experiences its highest rainfall levels of 305mm (12.01") and 309mm (12.17") respectively, spread over 21 and 18 days. Coupled with high humidity and temperatures lingering at 29°C (84.2°F), these months make outdoor activities challenging and uncomfortable for many tourists. Furthermore, with a UV index reaching maximum values, precautions against sun exposure become necessary.
Spring weather in Mustique
Spring in Mustique runs from March to May and is characterized by a gradual increase in temperature and rainfall. Temperatures progressively rise from a high of 28°C (82.4°F) in March to attain a peak of 30°C (86°F) in May, with the lows shifting between 21°C (69.8°F) to 23°C (73.4°F). Rainfall also tends to show a similar rising trend, starting at 104mm (4.09") in March and reaching up to 149mm (5.87") by May. The sea temperature remains warm, oscillating between 27°C (80.6°F) and 28°C (82.4°F). While sunshine hours stand steady at 8 hours a day, the UV index touches a limit of 12, denoting extreme exposure levels.
Summer weather in Mustique
Mustique's summer which extends between June and August is hallmarked by the highest temperatures and rainfall of the year. High temperatures remain stuck at a sultry 29°C (84.2°F), with the lowest being 23°C (73.4°F). Rainfall rockets to 234mm (9.21") in June and furthers to a yearly high of 305mm (12.01") in July before breaking at 282mm (11.1") in August. Meanwhile, the sea temperature loiters at a high of 28°C (82.4°F) and culminates to 29°C (84.2°F) in August. Amidst these conditions, daylight hours remain the longest making for extended outdoor activities despite the high UV index.
Autumn weather in Mustique
The Autumn in Mustique, celebrated between September and November, ushers in a continuation of summer trends, with a small reduction in temperatures. The high temperatures stick to 29°C (84.2°F) throughout the season, with the lows maintaining at 23°C (73.4°F) in September and October and finally dropping to 22°C (71.6°F) in November. Rainfall marks a high of 309mm (12.17") in October, then slightly descends to 271mm (10.67") in November. Sea temperature remains high at 29°C (84.2°F) in September and October, reducing to 28°C (82.4°F) in November. Notably, the UV index begins to recede from its maximum, dropping to 10 by November.
Winter weather in Mustique
Winter in Mustique is a warm affair that lasts from December to February. While the high temperature lowers to 28°C (82.4°F) in December and sustains throughout winter, the lower limits recede to 21°C (69.8°F) in January and February. The rainfall drops to 186mm (7.32") in December and falls further to an annual low of 97mm (3.82") by February. The sea temperature also cools, reverting to 27°C (80.6°F) across the season. More comfortable daylight hours return, ranging from 11.5 hours in December to 11.7 hours by February, with sunshine hours being 8 hours a day and the UV index retracting to a level of 9 by December.
Weather in January
January displays classic Caribbean weather, with warm patterns of temperature being the norm in Mustique, Saint Vincent and the Grenadines. With a rainfall of 130mm (5.12"), it is a fairly humid month. Reflecting the start of the year, January offers a mild UV index compared to the upcoming months. Weather in January »
Weather in February
The transitions of weather are subtle as January gives way to February. A slightly reduced rainfall sets the tone for a drier month. The sea temperature remains constant, allowing visitors to continue enjoying water activities. An increase in daylight is another favorable factor for outdoor enthusiasts. Weather in February »
Weather in March
The weather in March sees a continuation of the previous month's trend. While rainfall is marginally up from February, standing at 104mm (4.09"), overall, it remains a drier month. Sunshine hours remain consistent, making outdoor pursuits irresistible. Weather in March »
Weather in April
April ushers in a gradual change in the weather trends. With an increase in temperature, this month registers as being warmer than its predecessor. While rainfall sees a slight hike, it does not detract from the outdoor pleasures on offer. Weather in April »
Weather in May
The weather in May begins to prepare visitors for the approaching peak summer months. Rising temperatures meet increased rainfall, standing at 149mm (5.87"), reflecting the commencement of the wetter period of the year. Despite thisclimate shift, the sea temperature remains comforting for water activities. Weather in May »
Weather in June
June marks the threshold of the summer season in Mustique, bringing a noticeable increase in rainfall levels to 234mm (9.21"). Despite this meteorological shift, the temperatures remain attractive to visitors. The sea retains its warmth, while daylight hours extend, creating longer days for adventure. Weather in June »
Weather in July
July in Mustique is characterized by the year's highest rainfall of 305mm (12.01"). Despite such meteorological changes, the temperature patterns remain consistent, retaining the summer's charm. Water activities remain unabated due to stable sea temperatures. Weather in July »
Weather in August
August rings in the late summer months, maintaining a consistent temperature pattern. With a slight decrease in rainfall to 282mm (11.1"), it relieves a bit of July's heavy downpours. Outdoor enthusiasts benefit from a decrease in the UV index, while sea temperatures continue to invite visitors. Weather in August »
Weather in September
September ushers in early autumn, heralding a reduction in temperature. The rainfall remains substantial at 270mm (10.63"), signifying the lingering influence of the wet season. With shorter daylight hours, the pace starts to slow down. Weather in September »
Weather in October
The weather in October captures the essence of autumn in Mustique. Visitors will notice the highest rainfall of the season, amounting to 309mm (12.17"). Despite the rainy spell, temperatures remain moderate enough to enjoy the outdoors when showers permit. Weather in October »
Weather in November
November is the pivot towards the end of the year, with a gradual decrement in rainfall to 271mm (10.67"). The drop in temperatures does not dampen the spirit of outdoor activities, owing to a steady sea temperature. With diminishing daylight hours, early exploration is the key to enjoying this island. Weather in November »
Weather in December
December ushers in the holiday season in Mustique, Saint Vincent and the Grenadines. Rainfall takes a significant dip to 186mm (7.32"), providing a respite from the previous months' showers. Despite shorter daylight hours, consistent warmth lends an inviting aura to the island. Weather in December »
Updated: Jun 4, 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 is the coldest month?
The coldest period falls in January and February, when the average high-temperature reaches 27°C (80.6°F).
How many days does it rain?
Throughout the year, there are 200 rainfall days, and 2447mm (96.34") of precipitation is accumulated.
When is the sea coldest?
The months with the coldest seawater in Mustique are January through April and December, with an average sea temperature of 27°C (80.6°F).
What are the months with the most sunshine in Mustique?
January through August, November and December, with an average of 8h of sunshine, are months with the most sunshine.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 12 days and typically collects 97mm (3.82") of precipitation.
When is the highest UV index?
The months with the highest UV index are February through September, with an average maximum UV index of 12.
What time of the year is the hottest?
Mustique's temperatures tend to reach their peak averages in May, with a high of 30°C (86°F) and a low of 23°C (73.4°F).
When are the longest days in Mustique?
The month with the longest days is June, with an average of 12h and 54min of daylight.
What are the months with the warmest sea water?
September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Mustique.
What is the month with the least sunshine?
The months with the least sunshine are September and October, with an average of 7h of sunshine.
What is the rainiest month?
October is the month with the most rainfall. Rain falls for 18 days and accumulates 309mm (12.17") of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 11h and 24min of daylight.
Is there Daylight Saving Time (DST) in Mustique?
Mustique does not utilize Daylight Saving Time (DST). AST timezone is used over the entire year.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 9.
Average temperature
Mustique, Saint Vincent and the Grenadines
The warmest month (with the highest average high temperature) is May (30°C).
The months with the lowest average high temperature are January and February (27°C).
The months with the highest average low temperature are May, June, July, August, September and October (23°C).
The coldest months (with the lowest average low temperature) are January, February, March and December (21°C).
Average rainfall
Mustique, Saint Vincent and the Grenadines
- Average rainfall in January:
130mm - Average rainfall in February:
97mm - Average rainfall in March:
104mm - Average rainfall in April:
110mm - Average rainfall in May:
149mm - Average rainfall in June:
234mm
- Average rainfall in July:
305mm - Average rainfall in August:
282mm - Average rainfall in September:
270mm - Average rainfall in October:
309mm - Average rainfall in November:
271mm - Average rainfall in December:
186mm
The wettest month (with the highest rainfall) is October (309mm).
The driest month (with the least rainfall) is February (97mm).
Average rainfall days
Mustique, Saint Vincent and the Grenadines
- Average rainfall days in January:
16 days - Average rainfall days in February:
12 days - Average rainfall days in March:
12 days - Average rainfall days in April:
10 days - Average rainfall days in May:
14 days - Average rainfall days in June:
18 days
- Average rainfall days in July:
21 days - Average rainfall days in August:
20 days - Average rainfall days in September:
21 days - Average rainfall days in October:
18 days - Average rainfall days in November:
20 days - Average rainfall days in December:
18 days
The months with the highest number of rainy days are July and September (21 days).
The month with the least rainy days is April (10 days).
Average sea temperature
Mustique, Saint Vincent and the Grenadines
The best months for swimming (with the highest average sea temperature) are September and October (29°C).
The coldest months (with the lowest average sea temperature) are January, February, March, April and December (27°C).
Average daylight / Average sunshine
Mustique, Saint Vincent and the Grenadines
- Average daylight in January:
11h and 3min - Average daylight in February:
11h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 4min - Average daylight in June:
12h and 5min
- Average daylight in July:
12h and 5min - Average daylight in August:
12h and 3min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 3min - Average daylight in December:
11h and 2min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).
The months with the most sunshine are January, February, March, April, May, June, July, August, November and December (Average sunshine: 8h).
The months with the least sunshine are September and October (Average sunshine: 7h).
Average UV index
Mustique, Saint Vincent and the Grenadines
The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).
