Climate Chart of Edinburgh of the Seven Seas, Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Edinburgh of the Seven Seas, Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha, the climate data describe 2013–2023. The monthly mean temperature reaches 17.1 °C in February and falls to 11.2 °C in September, while the unweighted mean of monthly means is 14.1 °C. The supplied rainfall and sunshine figures add useful context for planning across the year, though monthly averages cannot predict conditions on any particular day.
Climate overview
Temperature
Monthly mean temperatures are highest at 17.1 °C in February and lowest at 11.2 °C in September. These figures describe monthly averages, not daytime highs or the range visitors may experience from one day to another. The unweighted mean across the monthly means is 14.1 °C, offering a broad summary rather than a day-weighted annual average.
Rain
Mean daily rainfall is highest at 6.83 mm/day in June and lowest at 2.93 mm/day in February. These are daily averages within each month, not monthly totals, and they do not show how often rain falls or guarantee conditions for a particular visit. The unweighted mean of the monthly figures is 4.74 mm/day.
Sunshine
Average daily sunshine ranges from 10.17 hours/day in January to 5.33 hours/day in June. These values describe sunshine duration, not day length, and are monthly averages rather than a promise of clear skies on any given day. The unweighted mean across the monthly figures is 7.92 hours/day.
Snow
The highest monthly mean daily snowfall is 0.04 mm/day in August, while the unweighted mean across monthly means is 0.01 mm/day. These small recorded averages do not establish how many days have snowfall, whether snow accumulates or remains on the ground, or whether conditions support skiing.
Best Travel Time Guide for Edinburgh of the Seven Seas, Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, February is the conditional option in the supplied figures, with mean daily rainfall of 2.93 mm/day; this does not guarantee dry days or indicate rain frequency. Prepare for the possibility of rain when travelling in June, when the mean daily figure is 6.83 mm/day. Both values are averages, not forecasts. Those prioritising cooler monthly mean conditions may consider September, at 11.2 °C. For outdoor sightseeing planned around average sunshine duration, January has the highest supplied mean at 10.17 hours/day, while June has the lowest at 5.33 hours/day; sunshine hours are not day length and do not ensure bright weather. These criteria point to different considerations rather than one universally best time to visit.
Climate Data Overview for Edinburgh of the Seven Seas, Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha
Explore the comprehensive climate data for Edinburgh of the Seven Seas, Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 16.6 | 3.10 | 0.00 | 10.17 |
| Feb | 17.1 | 2.93 | 0.00 | 9.70 |
| Mar | 16.9 | 5.28 | 0.00 | 8.23 |
| Apr | 15.7 | 5.56 | 0.00 | 7.22 |
| May | 14.2 | 6.14 | 0.00 | 6.10 |
| Jun | 12.9 | 6.83 | 0.00 | 5.33 |
| Jul | 11.9 | 5.67 | 0.00 | 5.76 |
| Aug | 11.4 | 4.40 | 0.04 | 6.96 |
| Sep | 11.2 | 4.57 | 0.03 | 7.73 |
| Oct | 12.1 | 5.17 | 0.00 | 8.65 |
| Nov | 13.3 | 3.87 | 0.00 | 9.48 |
| Dec | 15.4 | 3.37 | 0.00 | 9.72 |
| Average | 14.1 | 4.74 | 0.01 | 7.92 |
