Longyearbyen Weather in September

September in Longyearbyen averages 3°C (37°F) during the day and -1°C (30°F) at night. Around 58 mm (2.3 in) of snow/rainfall is typical for this time of year.

Rainfall in Longyearbyen in September

This month experiences about 8 days of snow/rain according to historical data, averaging 58 mm (2.3 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Longyearbyen in September

Daytime temperatures in Longyearbyen reach 3°C (37°F) in September, dropping to -1°C (30°F) at night. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. Nights are well below freezing at -1°C (30°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. The month brings very cold weather, so dressing warmly is essential. Prepare with multiple layers for added warmth.

Sunshine in Longyearbyen in September

The month is characterized by fewer sunny days, with roughly 77 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.

If you're interested in exploring other destinations, our weather planner can help you discover additional travel options worldwide.