September Weather in Edinburgh of the Seven Seas, Saint Helena, Ascension and Tristan da Cunha

Last updated: August 31, 2025

In September, the average temperature in Edinburgh of the Seven Seas, Saint Helena, Ascension and Tristan da Cunha hovers around 12°C (54°F), with a comfortable range from a cool 6°C (44°F) to a pleasant 16°C (61°F). Expect 97 mm (3.8 in) of precipitation over approximately 14 days, contributing to an average humidity of 78%. Embrace the mild weather while staying prepared for the occasional shower!

September Temperature in Edinburgh of the Seven Seas

In September in Edinburgh of the Seven Seas, the average temperature is 12°C (54°F). The maximum can reach 16°C (61°F), while the minimum can drop to as low as 6°C (44°F). It's a pleasant time to explore Edinburgh of the Seven Seas, so pack accordingly and enjoy outdoor activities!

September Weather in Edinburgh of the Seven Seas: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Edinburgh of the Seven Seas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Edinburgh of the Seven Seas, September typically has an average temperature of 12°C (54°F), with highs reaching up to 16°C (61°F) and lows dropping to around 6°C (44°F).

Data source: Temperature data for Edinburgh of the Seven Seas generated using information from the Copernicus Climate Change Service.

September Precipitation in Edinburgh of the Seven Seas

In Edinburgh of the Seven Seas in September, the total precipitation amount is 97 mm (3.8 in) spread over 14 days.

September Precipitation Trends in Edinburgh of the Seven Seas

The chart displays monthly precipitation patterns in Edinburgh of the Seven Seas, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Edinburgh of the Seven Seas, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Edinburgh of the Seven Seas

In Edinburgh of the Seven Seas in September humidity is 78%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill settling in, making travel a bit uncomfortable as the air clings to your skin, leaving you feeling cooler than the thermometer suggests.

September Average Humidity in Edinburgh of the Seven Seas

This chart illustrates the average monthly humidity levels in Edinburgh of the Seven Seas, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Edinburgh of the Seven Seas is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Edinburgh of the Seven Seas

In Edinburgh of the Seven Seas in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Edinburgh of the Seven Seas.

Maximum UV Index Levels in Edinburgh of the Seven Seas for September

The chart shows the monthly maximum UV Index (UVI) for Edinburgh of the Seven Seas in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Edinburgh of the Seven Seas typically reaches 8, which falls under the very high exposure category.

Data source: Edinburgh of the Seven Seas September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Edinburgh of the Seven Seas Compares to Other Months

Weather in Edinburgh of the Seven Seas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Edinburgh of the Seven Seas, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Edinburgh of the Seven Seas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	53 mm (2.1 inches)	84%	extreme
February Weather	18°C (65°F)	50 mm (2.0 inches)	84%	extreme
March Weather	18°C (65°F)	137 mm (5.4 inches)	81%	extreme
April Weather	17°C (62°F)	146 mm (5.7 inches)	82%	high
May Weather	15°C (60°F)	133 mm (5.2 inches)	79%	moderate
June Weather	14°C (57°F)	161 mm (6.3 inches)	78%	moderate
July Weather	13°C (55°F)	134 mm (5.3 inches)	82%	moderate
August Weather	12°C (54°F)	83 mm (3.3 inches)	80%	moderate
September Weather	12°C (54°F)	97 mm (3.8 inches)	78%	very high
October Weather	13°C (56°F)	111 mm (4.4 inches)	82%	very high
November Weather	14°C (58°F)	86 mm (3.4 inches)	83%	extreme
December Weather	16°C (61°F)	92 mm (3.6 inches)	85%	extreme