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Contents
- The climate of Charlestown
- The best time to visit Charlestown
- The worst time to visit Charlestown
- Spring weather in Charlestown
- Summer weather in Charlestown
- Autumn weather in Charlestown
- Winter weather in Charlestown
- 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 pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Charlestown
Located in the heart of the Caribbean, Charlestown, Saint Vincent and the Grenadines is classified as having a Köppen climate classification of Af, also known as an equatorial climate. Typically, towns with this classification have high humidity levels and abundant rainfall throughout the year. The town experiences uniform temperatures round the year with the smallest monthly variation in temperature may be just 1°C (33.8°F).
Throughout the year, the high temperature in Charlestown varies from 26.5°C (79.7°F) to 28.8°C (83.8°F) while the low temperature ranges from 25.8°C (78.4°F) to 28°C (82.4°F). Clear patterns emerge when depicting the climate in terms of temperature with it peaking in the months of July to October and tapering off in the other months. Relative humidity also remains high, ranging from 75% to 78%. This constant high humidity is a characteristic feature of equatorial climates.
The town receives rainfall throughout the year with monthly averages ranging from 23mm (0.91") to 94mm (3.7"). Highest rainfall is observed between July and October. The number of rainy days can range anywhere from 14.8 to 24.3 a year suggesting that even though rainfall is relatively consistent, the frequency of rainy days can vary quite a bit throughout the year.
Throughout the year, the high temperature in Charlestown varies from 26.5°C (79.7°F) to 28.8°C (83.8°F) while the low temperature ranges from 25.8°C (78.4°F) to 28°C (82.4°F). Clear patterns emerge when depicting the climate in terms of temperature with it peaking in the months of July to October and tapering off in the other months. Relative humidity also remains high, ranging from 75% to 78%. This constant high humidity is a characteristic feature of equatorial climates.
The town receives rainfall throughout the year with monthly averages ranging from 23mm (0.91") to 94mm (3.7"). Highest rainfall is observed between July and October. The number of rainy days can range anywhere from 14.8 to 24.3 a year suggesting that even though rainfall is relatively consistent, the frequency of rainy days can vary quite a bit throughout the year.
The best time to visit Charlestown
Considering the consistent climate and dependent on the preferences of the traveller, the best time to visit Charlestown would be during the months when it receives the lowest amount of rainfall. January through March see the lowest rainfall with 26mm (1.02"), 23mm (0.91"), and 26mm (1.02") respectively. These months also have the least number of rainy days ranging from 14.8 to 16.5 days. Meanwhile, the temperature during this time ranges from 26.5°C (79.7°F) to 26.9°C (80.4°F) for high temperature and 25.7°C (78.3°F) to 25.8°C (78.4°F) for low temperature. This period also sees longer daylight hours with 11.5 to 12.1 hours of sunlight per day compared to other months.
The worst time to visit Charlestown
The months with the most rainfall and highest number of rainy days are typically considered the least suitable for visiting Charlestown. During July and August, rainfall averages rise significantly to 74mm (2.91") to 94mm (3.7") and the town sees 24.1 to 24.3 rainy days. Wind speeds also see a slight increase during these months, ranging from 26.7km/h (16.6mph) to 28.3km/h (17.6mph).
Spring weather in Charlestown
During the springtime months which span March, April, and May, Charlestown witnesses a steady rise in temperatures. By May, the town experiences mean high temperatures of 28°C (82.4°F) and low temperatures of 27.1°C (80.8°F). Rainfall also starts to increase slightly with an average of 32mm (1.26") in April up to 29mm (1.14") in May. The number of daylight hours also increases, with the spring months seeing anywhere between 12.1 to 12.7 hours of sunlight per day.
Summer weather in Charlestown
The summer months, including June, July, and August, are the warmest in Charlestown. Average high temperatures range from 28.3°C (82.9°F) in June and July to 28.7°C (83.7°F) in August. The lowest temperatures recorded during this period remain consistently between 27.3°C (81.1°F) to 27.7°C (81.9°F). Rainfall sees a dramatic spike in these months, going from 53mm (2.09") in June to a high of 94mm (3.7") in August.
Autumn weather in Charlestown
Autumn, from September to November, sees a slight dip in temperatures and a marked decrease in rainfall. High temperatures range from 28.8°C (83.8°F) in September to 28.2°C (82.8°F) in November while low temperatures dip from 28°C (82.4°F) to 27.5°C (81.5°F). Rainfall begins its gradual decrease, going from a high of 81mm (3.19") in September to 64mm (2.52") by November. The number of rainy days also starts to decrease, with 21.4 rainy days in September down to 20.4 by November.
Winter weather in Charlestown
Winter months in Charlestown, encapsulating December, January, and February, are slightly cooler and more humid than the rest of the year. High temperatures dip to 27.6°C (81.7°F) in December, reaching a low of 26.5°C (79.7°F) by February. The low temperatures range from 26.5°C (79.7°F) in December to 25.8°C (78.4°F) in February. Rainfall recedes further, reaching its yearly low of 23mm (0.91") in February. The winter months also receive the shortest average daylight hours, varying from 11.4 to 11.7 hours per day.
Weather in January
Moving into the New Year, Charlestown greets residents and visitors with mild warmth. This coastal city experiences relatively stable weather conditions through the month, with high humidity and brisk winds. January offers plenty of daylight for outdoor activities at a pleasant maximum temperature of 26.9°C (80.4°F). Weather in January »
Weather in February
February continues to maintain the mild weather pattern iconic to Charlestown. This month witnesses a slight increase in sunshine hours, making it slightly brighter than January. With relatively consistent thermal readings, February sees a slight drop in rainfall from 26mm (1.02") to 23mm (0.91"). Weather in February »
Weather in March
Transitioning into March, Charlestown experiences a minor increase in the average temperature. The month continues February's trend of less rainfall, with precipitation slightly rising to 26mm (1.02"). Mild breezes sustain across the month, ensuring a pleasant ambience in the city. Weather in March »
Weather in April
As April approaches, Charlestown plunges into a slightly hotter regime with a moderate increase in rainfall up to 32mm (1.26"). Consequently, the city becomes more lush and scenic with the additional showers. The month commends the arrival of the tropical season. Weather in April »
Weather in May
May marks the transition period between the dry and wet seasons in Charlestown. It ushers in warmer temperatures which contribute to intensifying the overall humidity. The city also observes a significant rise in rainfall from 32mm (1.26") in April to 29mm (1.14") in May. Weather in May »
Weather in June
June in Charlestown is more humid and hotter than May with average temperatures reaching 28.3°C (82.9°F). This month showcases the city in its full tropical glory with the highest rainfall of the year of 53mm (2.09"). The rise in humidity and rain is accompanied by subtle shifts in general weather patterns with infrequent fluctuations in cloud cover and wind speed. Weather in June »
Weather in July
July continues June's pattern of high humidity and tropical temperatures. Rainfall increases even further to 74mm (2.91") as Charlestown settles fully into the wet season. However, the increase in rain does not drastically affect the length of daylight hours, maintaining a balance between sunshine and showers. Weather in July »
Weather in August
August witnesses a slight decrease in humidity while the temperature remains unchanged. Despite being in the wet season, rainfall reaches 94mm (3.7"), marking August as the wettest month in Charlestown. The moderate wind speed combined with high rainfall makes it a month of heightened tropical activity. Weather in August »
Weather in September
September brings a decrease in both temperature and humidity to Charlestown. Despite being in the latter part of the wet season, there is a significant drop in rainfall from 94mm (3.7") in August to 81mm (3.19"). However, daylight hours remain constant, providing consistent brightness throughout the day. Weather in September »
Weather in October
October comes with a marginal rise in temperature, thus initiating a transition back to the dry season. Despite still being part of the wet season, the month experiences decreased rainfall of 86mm (3.39"). Still, daylight and sunshine hours hold steady, ensuring generous light throughout the day. Weather in October »
Weather in November
November in Charlestown is characterized by further cooling temperatures and decreasing rainfalls. The month sees a slight dip in humidity, making for a less tropical weather experience as it experiences rainfall of 64mm (2.52"). Weather in November »
Weather in December
December signals the onset of the dry season in Charlestown with further decreases in both temperature and rainfall, which drops to 39mm (1.54"). Consistently strong breezes refresh the city, maintaining a comfortable and mild climate despite the drop in humidity. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Charlestown?
Throughout the year, there are 238.6 rainfall days, and 627mm (24.69") of precipitation is accumulated.
What are the months with the highest UV index in Charlestown?
January through December, with an average maximum UV index of 7, are months with the highest UV index.
What is the month with the lowest UV index in Charlestown?
January through December, with an average maximum UV index of 7, are months with the lowest UV index in Charlestown.
What time of the year is the coldest in Charlestown?
Charlestown, Saint Vincent and the Grenadines, witnesses the coldest weather in February, with temperatures averaging a high of 26.5°C (79.7°F) and a low of 25.7°C (78.3°F).
What is the least humid month in Charlestown?
The least humid month is February, with an average relative humidity of 75%.
What is the driest month in Charlestown?
February is the month with the least rainfall. Rain falls for 14.8 days and accumulates 23mm (0.91") of precipitation.
What are the most humid months in Charlestown?
May through July, with an average relative humidity of 78%, are most humid months.
When are the longest days in Charlestown?
With an average of 12h and 54min of daylight, June has the longest days of the year in Charlestown, Saint Vincent and the Grenadines.
What is the rainiest month in Charlestown?
The month with the most rainfall is August, when the rain falls for 24.3 days and typically aggregates up to 94mm (3.7") of precipitation.
What month has the most sunshine in Charlestown?
August has the most sunshine of the year, with an average of 10.1h of sunshine.
What is the hottest time of year in Charlestown?
The month of September, characterized by an average high of 28.8°C (83.8°F) and a low of 28°C (82.4°F), is recognized as the warmest in Charlestown.
What is the month with the shortest days in Charlestown?
With an average of 11h and 24min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST) in Charlestown?
Charlestown does not utilize Daylight Saving Time (DST). AST timezone is used over the entire year.
What is the month with the least sunshine in Charlestown?
With an average of 6.4h of sunshine, December has the least sunshine of the year.
Average temperature
Charlestown, Saint Vincent and the Grenadines
The warmest month (with the highest average high temperature) is September (28.8°C).
The month with the lowest average high temperature is February (26.5°C).
The month with the highest average low temperature is September (28°C).
The coldest month (with the lowest average low temperature) is February (25.7°C).
Average pressure
Charlestown, Saint Vincent and the Grenadines
- Average pressure in January:
1014.2mbar - Average pressure in February:
1014.1mbar - Average pressure in March:
1014mbar - Average pressure in April:
1013.7mbar - Average pressure in May:
1013.8mbar - Average pressure in June:
1014.5mbar
- Average pressure in July:
1014.2mbar - Average pressure in August:
1013.1mbar - Average pressure in September:
1012.2mbar - Average pressure in October:
1011.3mbar - Average pressure in November:
1010.9mbar - Average pressure in December:
1012.9mbar
The month with the highest atmospheric pressure is June (1014.5mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed
Charlestown, Saint Vincent and the Grenadines
- Average wind speed in January:
29km/h - Average wind speed in February:
29.3km/h - Average wind speed in March:
26.8km/h - Average wind speed in April:
26km/h - Average wind speed in May:
26.4km/h - Average wind speed in June:
28.3km/h
- Average wind speed in July:
26.7km/h - Average wind speed in August:
23.3km/h - Average wind speed in September:
20.6km/h - Average wind speed in October:
22.4km/h - Average wind speed in November:
24.5km/h - Average wind speed in December:
27.8km/h
The windiest month (with the highest average wind speed) is February (29.3km/h).
The calmest month (with the lowest average wind speed) is September (20.6km/h).
Average humidity
Charlestown, Saint Vincent and the Grenadines
The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is February (75%).
Average rainfall
Charlestown, Saint Vincent and the Grenadines
The wettest month (with the highest rainfall) is August (94mm).
The driest month (with the least rainfall) is February (23mm).
Average rainfall days
Charlestown, Saint Vincent and the Grenadines
- Average rainfall days in January:
18.7 days - Average rainfall days in February:
14.8 days - Average rainfall days in March:
16.5 days - Average rainfall days in April:
17.7 days - Average rainfall days in May:
19.1 days - Average rainfall days in June:
20 days
- Average rainfall days in July:
24.1 days - Average rainfall days in August:
24.3 days - Average rainfall days in September:
21.4 days - Average rainfall days in October:
22.1 days - Average rainfall days in November:
20.4 days - Average rainfall days in December:
19.5 days
The month with the highest number of rainy days is August (24.3 days).
The month with the least rainy days is February (14.8 days).
Average daylight / Average sunshine
Charlestown, 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).
- Average sunshine in January:
7h and 3min - Average sunshine in February:
8h and 4min - Average sunshine in March:
8h and 3min - Average sunshine in April:
9h and 5min - Average sunshine in May:
9h and 5min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
10h and 0min - Average sunshine in October:
8h and 2min - Average sunshine in November:
6h and 4min - Average sunshine in December:
6h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days
Charlestown, Saint Vincent and the Grenadines
- Average sunshine days in January:
7.1 days - Average sunshine days in February:
9.3 days - Average sunshine days in March:
9.3 days - Average sunshine days in April:
5.8 days - Average sunshine days in May:
5.3 days - Average sunshine days in June:
4.2 days
- Average sunshine days in July:
1.7 days - Average sunshine days in August:
3.2 days - Average sunshine days in September:
5.4 days - Average sunshine days in October:
6.5 days - Average sunshine days in November:
5.8 days - Average sunshine days in December:
6.2 days
The months with the most sunshine days are February and March (9.3 days).
The month with the least sunshine days is July (1.7 days).
Average UV index
Charlestown, Saint Vincent and the Grenadines
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Charlestown, Saint Vincent and the Grenadines
The month with the most cloud cover is July (Cloud cover 46).
The months with the least cloud cover are January and February (Cloud cover 37).
Average visibility
Charlestown, Saint Vincent and the Grenadines
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Charlestown, Saint Vincent and the Grenadines
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