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Contents
- The climate of Georgetown
- The best time to visit Georgetown
- The worst time to visit Georgetown
- Spring weather in Georgetown
- Summer weather in Georgetown
- Autumn weather in Georgetown
- Winter weather in Georgetown
- 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 Georgetown
Surrounded by the vast waters of the South Atlantic Ocean, Georgetown, the capital of Saint Helena, Ascension, and Tristan da Cunha, bears the Am monsoonal variant of a tropical rainforest climate, according to the Köppen climate classification. This climate remains relatively constant throughout the year, providing warm and humid conditions.
A closer look at the data reveals that temperatures fluctuate slightly over the months, offering a pleasant warmth all year round. High temperatures remain nestled within a narrow range, from 23.5°C (74.3°F) to 27.3°C (81.1°F), while the lows show a similar trend, oscillating from 23°C (73.4°F) to 26.2°C (79.2°F). Humidity percentages dip to 75% during the middle of the year, but stay near the 80% mark throughout the rest of the months, illustrating a generally high level of humidity.
One prime weather feature in Georgetown is its consistent rainfall distribution. Rainfall in millimeters ranges from 8mm (0.31") to 20mm (0.79"), demonstrating a relative spread across the months. The influence of this can be seen in the number of rainfall days, which peak at 19.8 during August and dip as low as 7.4 in February.
On the subject of sunshine, the figures reveal a decrease during the middle half of the year, from 5.2 hours in September to 6.9 hours in July, resurging back to 7.4 hours by December. The trend is echoed in sun-filled days which bottom out at 1.8 in August and ascend to 11.3 in March.
Georgetown's dominant weather characteristic is its year-round consistency, but the impressive wind speeds stand as another notable feature. With wind speeds varying from 21.7km/h (13.5mph) to 28.1km/h (17.5mph), Georgetown experiences brisk wind conditions, peaking in July.
A closer look at the data reveals that temperatures fluctuate slightly over the months, offering a pleasant warmth all year round. High temperatures remain nestled within a narrow range, from 23.5°C (74.3°F) to 27.3°C (81.1°F), while the lows show a similar trend, oscillating from 23°C (73.4°F) to 26.2°C (79.2°F). Humidity percentages dip to 75% during the middle of the year, but stay near the 80% mark throughout the rest of the months, illustrating a generally high level of humidity.
One prime weather feature in Georgetown is its consistent rainfall distribution. Rainfall in millimeters ranges from 8mm (0.31") to 20mm (0.79"), demonstrating a relative spread across the months. The influence of this can be seen in the number of rainfall days, which peak at 19.8 during August and dip as low as 7.4 in February.
On the subject of sunshine, the figures reveal a decrease during the middle half of the year, from 5.2 hours in September to 6.9 hours in July, resurging back to 7.4 hours by December. The trend is echoed in sun-filled days which bottom out at 1.8 in August and ascend to 11.3 in March.
Georgetown's dominant weather characteristic is its year-round consistency, but the impressive wind speeds stand as another notable feature. With wind speeds varying from 21.7km/h (13.5mph) to 28.1km/h (17.5mph), Georgetown experiences brisk wind conditions, peaking in July.
The best time to visit Georgetown
Considering the overall climatic conditions, the best time to visit Georgetown is arguably during the period from March to May. This window offers a balance between high temperatures, which linger around 27°C (80.6°F), and relatively lower humidity levels, centered around 78%. These months also carry fewer rainfall days, making it an ideal time for outdoor activities.
Additionally, March exhibits the highest amount of average daily sunshine, reaching 11.3 hours, adding to the allure of this time frame. The steady wind speeds of around 22km/h (13.7mph) to 24.8km/h (15.4mph) during these months also contribute to the overall pleasant weather.
Additionally, March exhibits the highest amount of average daily sunshine, reaching 11.3 hours, adding to the allure of this time frame. The steady wind speeds of around 22km/h (13.7mph) to 24.8km/h (15.4mph) during these months also contribute to the overall pleasant weather.
The worst time to visit Georgetown
Contrary to the earlier-mentioned period, the months from July to September may pose some challenges for visitors. In these months, Georgetown experiences lower temperatures, with the low touching 23°C (73.4°F) in September, higher humidity values ranging from 75 to 80%, and increased rainfall. August records the highest rain days at 19.8 and the least sunlit days at 1.8.
Additionally, wind speeds peak during this time, particularly in July, hitting a high of 28.1km/h (17.5mph) with gusts reaching up to 38.5km/h (23.9mph). Combined with cloud cover percentage scaling 60 to 68%, the weather becomes less conducive for outdoor activities or sightseeing.
Additionally, wind speeds peak during this time, particularly in July, hitting a high of 28.1km/h (17.5mph) with gusts reaching up to 38.5km/h (23.9mph). Combined with cloud cover percentage scaling 60 to 68%, the weather becomes less conducive for outdoor activities or sightseeing.
Spring weather in Georgetown
Georgetown's spring months - March, April, and May - are marked by welcoming conditions. March stands out with highest sunlit days, 11.3 on average, while April and May see a progressive increase in humidity, from 78% to 77%, respectively. Rainfall is consistent across this period, fluctuating mildly from 14mm (0.55") to 19mm (0.75"), while wind speeds display a gradual increment, reaching 24.8km/h (15.4mph) in May.
Summer weather in Georgetown
Summer, extending from June through August, ushers in substantial cloud cover, reaching peak values of 60% in August. Though the high temperatures linger at comfortable mid-20s°C, wind speeds escalate during these months, particularly in July and August, hitting highs of 28.1km/h (17.5mph) and 27.8km/h (17.3mph) respectively. Rainfall also marks a slight increase with July reaching a peak at 20mm (0.79").
Autumn weather in Georgetown
The autumn months - September, October, and November - experience cooler temperatures, with lows descending to 23°C (73.4°F). While the cloud percentage continues to be high, the hours of sunshine show an increase, particularly in November, reaching up to 5.5 hours. The period also observes a decrease in wind speeds, dropping to 25.6km/h (15.9mph) by November.
Winter weather in Georgetown
In the winter period from December to February, Georgetown showcases a uniquely tropical feel. The high temperature in this period ranges from 24.4°C (75.9°F) to 26.5°C (79.7°F), with the low maintaining the 23-25°C (-13°F) range. Moreover, the sunshine hours progressively increase from December's 5.9 hours, reaching 8 hours by February. While December experiences a moderate level of rainfall days at 12.1, February shows a significant decrease, measuring only 7.4 days. Winter also tends to be less windy, with wind speeds reducing to 22km/h (13.7mph) by February.
Weather in January
The new year brings the warmth of summer weather to Georgetown, Saint Helena, Ascension and Tristan da Cunha. In January, the climate tends to be humid, with reasonably high rainfall, interspersed with periods of sunlight. Some of the hallmarks are the warm days and cooler nights. Weather in January »
Weather in February
February maintains the trend of warm, summertime temperatures from January to February. A marked decrease in rainfall from 9.1 days to 7.4 days of precipitation is noticeable, accompanied by an increase in daily sunshine hours. Weather in February »
Weather in March
The transition from February to March brings minor changes to the weather in Georgetown, Saint Helena, Ascension and Tristan da Cunha. A relatively warm and consistent climate persists; however, the humidity begins to wane. The increase in relative humidity from February's 79% to March's 78% contributes subtly to a change in the region's ambience. Weather in March »
Weather in April
April is characterized by a shift in the weather dynamics of Georgetown, Saint Helena, Ascension and Tristan da Cunha. One may notice a visible decrease in daylight hours along with a slight reduction in temperatures. This month takes the lead in terms of total rainfall with a mark set at 19mm (0.75"), the highest recorded for the year up to this point. Weather in April »
Weather in May
In May, Georgetown, Saint Helena, Ascension and Tristan da Cunha experiences a further decrease in sunlight hours. As the season transitions further into the cooler months, the temperatures taper slightly, and rainfall becomes more sporadic. Weather in May »
Weather in June
June continues the trend of decreasing temperatures in Georgetown, Saint Helena, Ascension and Tristan da Cunha. The start of the Southern Hemisphere winter, June signifies colder nights and the continuation of windy conditions, with wind speeds averaging 27.5km/h (17.1mph). Weather in June »
Weather in July
The winter chill takes a firmer hold of Georgetown, Saint Helena, Ascension and Tristan da Cunha in July. This month notices a slight drop in average temperatures to 24°C (75.2°F) alongside increasing rainfall. The wind speed continues to hover around the same values as June, recording a high of 28.1km/h (17.5mph). Weather in July »
Weather in August
August represents a progression of the wintry conditions prevalent in Georgetown, Saint Helena, Ascension and Tristan da Cunha. The average temperatures hover between the low and mid 20°C (68°F), maintaining the cool conditions initiated by the onset of winter. Weather in August »
Weather in September
September ushers in the early signs of spring at Georgetown, Saint Helena, Ascension and Tristan da Cunha. The UV index drops to 5, the lowest it has been all year, reflecting the influence of the changing season. The typical climate is a blend of lowering winds, consistent temperatures, and gradually increasing daylight hours. Weather in September »
Weather in October
As October arrives in Georgetown, Saint Helena, Ascension and Tristan da Cunha, the weather continues to transition towards the warmer months. The variation in temperatures from 23°C (73.4°F) to 24°C (75.2°F) sets in motion a gradual return to the balmy conditions characteristic of the island. Weather in October »
Weather in November
November brings a palpable change in the weather at Georgetown, Saint Helena, Ascension and Tristan da Cunha. The fluctuation in temperatures remains minimal; however, a subtle increase is observed in the island's climate. The UV Index rises back to 5, indicative of the approaching summer. Weather in November »
Weather in December
The last month of the year, December, sees a substantial change in the weather of Georgetown, Saint Helena, Ascension and Tristan da Cunha. With an average wind speed of 23.9km/h (14.9mph), December proves to be the least windy month of the year. Weather in December »
[Resources]Frequently asked questions
What is the driest month in Georgetown?
January and February are months with the least rain in Georgetown, Saint Helena, Ascension and Tristan da Cunha, when the rain falls for 9.1 days and typically aggregates up to 8mm (0.31") of rain.
How much does it rain in Georgetown?
In Georgetown, during the entire year, the rain falls for 166.5 days and collects up to 168mm (6.61") of precipitation.
When is the highest UV index in Georgetown?
January through May, with an average maximum UV index of 7, are months with the highest UV index in Georgetown.
What month has the most sunshine in Georgetown?
March has the most sunshine of the year, with an average of 8.1h of sunshine.
What month is the hottest in Georgetown?
The warmest period in Georgetown, Saint Helena, Ascension and Tristan da Cunha, is April, when temperatures fluctuate between an average high of 27.3°C (81.1°F) and a low of 26.2°C (79.2°F).
What are the least humid months in Georgetown?
June and July, with an average relative humidity of 75%, are the least humid months.
What is the month with the shortest days in Georgetown?
With an average of 11h and 42min of daylight, June has the shortest days of the year.
What is the wettest month in Georgetown?
The month with the most rainfall in Georgetown is July, when the rain falls for 17 days and typically aggregates up to 20mm (0.79") of precipitation.
What part of the year is the coldest in Georgetown?
September is the month that records the lowest temperatures, with averages ranging from a high of 23.5°C (74.3°F) to a low of 23°C (73.4°F).
When is the lowest UV index in Georgetown?
September through November, with an average maximum UV index of 5, are months with the lowest UV index in Georgetown.
What is the most humid month in Georgetown?
The months with the highest humidity are October and November, with an average relative humidity of 81%.
What is the month with the least sunshine in Georgetown?
October has the least sunshine of the year in Georgetown, Saint Helena, Ascension and Tristan da Cunha, with an average of 5.2h of sunshine.
When are the longest days in Georgetown?
December has the longest days of the year in Georgetown, with an average of 12h and 36min of daylight.
Is there Daylight Saving Time (DST) in Georgetown?
Georgetown, Saint Helena, Ascension and Tristan da Cunha, does not utilize Daylight Saving Time (DST). GMT timezone is used throughout the entire year.
Average temperature
Georgetown, Saint Helena, Ascension and Tristan da Cunha
The warmest month (with the highest average high temperature) is April (27.3°C).
The month with the lowest average high temperature is September (23.5°C).
The month with the highest average low temperature is April (26.2°C).
The coldest months (with the lowest average low temperature) are September and November (23°C).
Average pressure
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average pressure in January:
1012.7mbar - Average pressure in February:
1011.8mbar - Average pressure in March:
1011.8mbar - Average pressure in April:
1012mbar - Average pressure in May:
1013.3mbar - Average pressure in June:
1015.3mbar
- Average pressure in July:
1016.1mbar - Average pressure in August:
1016.1mbar - Average pressure in September:
1015.6mbar - Average pressure in October:
1014.1mbar - Average pressure in November:
1013.1mbar - Average pressure in December:
1013mbar
The months with the highest atmospheric pressure are July and August (1016.1mbar).
The months with the lowest atmospheric pressure are February and March (1011.8mbar).
Average wind speed
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average wind speed in January:
21.7km/h - Average wind speed in February:
22km/h - Average wind speed in March:
22.5km/h - Average wind speed in April:
24.8km/h - Average wind speed in May:
26.1km/h - Average wind speed in June:
27.5km/h
- Average wind speed in July:
28.1km/h - Average wind speed in August:
27.8km/h - Average wind speed in September:
27.2km/h - Average wind speed in October:
26.1km/h - Average wind speed in November:
25.6km/h - Average wind speed in December:
23.9km/h
The windiest month (with the highest average wind speed) is July (28.1km/h).
The calmest month (with the lowest average wind speed) is January (21.7km/h).
Average humidity
Georgetown, Saint Helena, Ascension and Tristan da Cunha
The months with the highest relative humidity are October and November (81%).
The months with the lowest relative humidity are June and July (75%).
Average rainfall
Georgetown, Saint Helena, Ascension and Tristan da Cunha
The wettest month (with the highest rainfall) is July (20mm).
The driest months (with the least rainfall) are January and February (8mm).
Average rainfall days
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average rainfall days in January:
9.1 days - Average rainfall days in February:
7.4 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
12 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
19.8 days - Average rainfall days in September:
18.5 days - Average rainfall days in October:
17.3 days - Average rainfall days in November:
14.1 days - Average rainfall days in December:
12.1 days
The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is February (7.4 days).
Average daylight / Average sunshine
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average daylight in January:
12h and 3min - Average daylight in February:
12h and 2min - Average daylight in March:
12h and 1min - Average daylight in April:
11h and 5min - Average daylight in May:
11h and 5min - Average daylight in June:
11h and 4min
- Average daylight in July:
11h and 4min - Average daylight in August:
11h and 5min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 2min - Average daylight in November:
12h and 3min - Average daylight in December:
12h and 4min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in January:
7h and 2min - Average sunshine in February:
8h and 0min - Average sunshine in March:
8h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
7h and 2min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
6h and 5min - Average sunshine in August:
6h and 0min - Average sunshine in September:
5h and 3min - Average sunshine in October:
5h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
5h and 5min
The month with the most sunshine is March (Average sunshine: 8h and 6min).
The month with the least sunshine is October (Average sunshine: 5h and 12min).
Average sunshine days
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average sunshine days in January:
9.3 days - Average sunshine days in February:
9.9 days - Average sunshine days in March:
11.3 days - Average sunshine days in April:
6.7 days - Average sunshine days in May:
5.1 days - Average sunshine days in June:
3.8 days
- Average sunshine days in July:
3.2 days - Average sunshine days in August:
1.8 days - Average sunshine days in September:
2 days - Average sunshine days in October:
3.9 days - Average sunshine days in November:
4.7 days - Average sunshine days in December:
4.8 days
The month with the most sunshine days is March (11.3 days).
The month with the least sunshine days is August (1.8 days).
Average UV index
Georgetown, Saint Helena, Ascension and Tristan da Cunha
The months with the highest UV index are January, February, March, April and May (UV index 7).
The months with the lowest UV index are September, October and November (UV index 5).
Average cloud cover
Georgetown, Saint Helena, Ascension and Tristan da Cunha
The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is March (Cloud cover 40).
Average visibility
Georgetown, Saint Helena, Ascension and Tristan da Cunha
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).
Georgetown, Saint Helena, Ascension and Tristan da Cunha
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