Last updated: August 31, 2025
In September, the average temperature in Olonkinbyen, Svalbard and Jan Mayen hovers around 5°C (42°F), with a chilly minimum of -1°C (31°F) and a comfortable maximum of 10°C (49°F). Be prepared for some wet days, as precipitation measures 78 mm (3.1 in) over approximately 16 days, while the air remains quite humid with an average humidity of 91%.
In September in Olonkinbyen, the average temperature is 5°C (42°F). The maximum can reach 10°C (49°F), while the minimum can drop as low as -1°C (31°F). Be sure to pack layers to stay comfortable during your trip!
In Olonkinbyen in September, the precipitation amount is 78 mm (3.1 in) over the course of 16 days.
In Olonkinbyen in September humidity is 91%. With an average temperature of 5°C (42°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it challenging to enjoy outdoor activities and travel comfortably.
In Olonkinbyen in September, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Olonkinbyen, you can visit Hourly UV Index in Olonkinbyen.
UV Risk Categories
Weather in Olonkinbyen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Olonkinbyen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 80 mm (3.2 inches) | 85% | low |
| February Weather | -2°C (30°F) | 67 mm (2.7 inches) | 86% | low |
| March Weather | -3°C (27°F) | 61 mm (2.4 inches) | 89% | low |
| April Weather | -2°C (30°F) | 63 mm (2.5 inches) | 89% | moderate |
| May Weather | 0°C (33°F) | 41 mm (1.6 inches) | 85% | moderate |
| June Weather | 3°C (37°F) | 33 mm (1.3 inches) | 89% | moderate |
| July Weather | 5°C (42°F) | 43 mm (1.7 inches) | 92% | moderate |
| August Weather | 6°C (44°F) | 42 mm (1.6 inches) | 89% | moderate |
| September Weather | 5°C (42°F) | 78 mm (3.1 inches) | 91% | low |
| October Weather | 3°C (37°F) | 63 mm (2.5 inches) | 86% | low |
| November Weather | 0°C (32°F) | 81 mm (3.2 inches) | 84% | low |
| December Weather | -1°C (30°F) | 76 mm (3.0 inches) | 84% | low |