Last updated: August 31, 2025
In December, the average temperature in Edinburgh of the Seven Seas, Saint Helena, Ascension and Tristan da Cunha hovers around 16°C (61°F), with temperatures dipping to a cool 12°C (54°F) and peaking at a comfortable 21°C (69°F). Expect 92 mm (3.6 in) of rainfall spread across 11 days, contributing to an average humidity level of 85%. Whether you're planning outdoor activities or cozy indoor moments, be prepared for a delightful yet moist atmosphere!
In December in Edinburgh of the Seven Seas, the average temperature is 16°C (61°F). The maximum can reach 21°C (69°F), while the minimum can drop to as low as 12°C (54°F). This pleasant weather makes it an ideal time for outdoor activities and exploration.
In Edinburgh of the Seven Seas in December, the precipitation amount is 92 mm (3.6 in) spread over 11 days.
In Edinburgh of the Seven Seas in December, humidity is 85%. With an average temperature of 16°C (61°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities feel sticky and the air heavy, which can be challenging for traveling and exploring the area comfortably.
In Edinburgh of the Seven Seas in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Edinburgh of the Seven Seas.
UV Risk Categories
Weather in Edinburgh of the Seven Seas varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Edinburgh of the Seven Seas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| 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 |