Oulu Weather in September

September in Oulu averages 14°C (57°F) during the day and 7°C (45°F) at night. Quite a bit of rainfall is typical this month, with around 66 mm (2.6 in) on average. An umbrella is a good idea.

Rainfall in Oulu in September

This month experiences about 16 days of rain according to historical data, averaging 66 mm (2.6 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Oulu in September

Oulu in September gets highs of 14°C (57°F) during the day and drops to 7°C (45°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Oulu in September

The month brings about 135 hours of sunlight, offering a comfortable mix of sun and overcast.

Wind Speed in Oulu in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

At 12°C (54°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

Should you favor a climate that's both dry and comfortably warm, July typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.