Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Georgetown, September records the lowest average temperatures, peaking at 23.5°C (74.3°F) and reaching a low of 23°C (73.4°F).Humidity
In September, the average relative humidity is 80%.Rainfall
In Georgetown, in September, during 18.5 rainfall days, 14mm (0.55") of precipitation is typically accumulated. Throughout the year, there are 166.5 rainfall days, and 168mm (6.61") of precipitation is accumulated.Daylight
The average length of the day in September in Georgetown is 12h and 4min.On the first day of September, sunrise is at 06:58 and sunset at 18:56. On the last day of the month, sunrise is at 06:42 and sunset at 18:52 GMT.
Sunshine
In Georgetown, Saint Helena, Ascension and Tristan da Cunha, the average sunshine in September is 5.5h.UV index
The months with the lowest UV index in Georgetown are September through November, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What part of the year is the coldest in Georgetown?
What are September temperatures in Georgetown?
What is the average humidity in September in Georgetown?
How many days does it rain in September in Georgetown?
What is the average length of the day in September in Georgetown?
When are sunrise and sunset in September in Georgetown?
How long on average sun shines in September in Georgetown?
When is the lowest UV index in Georgetown?
What is the UV index reading in September in Georgetown?
Average temperature in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average high temperature in September: 23.5°C
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).
- Average low temperature in September: 23°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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average pressure in September: 1015.6mbar
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average wind speed in September: 27.2km/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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average humidity in September: 80%
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average rainfall in September: 14mm
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average rainfall days in September: 18.5 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 in September /
Average sunshine in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average daylight in September: 12h and 1min
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 September: 5h and 3min
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average sunshine days in September: 2 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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average UV index in September: 5
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average cloud cover in September: 66
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 in September
Georgetown, Saint Helena, Ascension and Tristan da Cunha
- Average visibility in September: 10km
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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