Vantaa Weather in September

September in Vantaa brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 8°C (46°F). Quite a bit of rainfall is expected, around 64 mm (2.5 in), so pack an umbrella.

Rainfall in Vantaa in September

You can expect rain on around 17 days based on historical patterns, with 64 mm (2.5 in) average for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.

Temperature in Vantaa in September

Daytime highs in Vantaa in September reach 16°C (61°F), with nights around 8°C (46°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 8°C (46°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Vantaa in September

The city usually sees around 151 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Vantaa in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in September

The water temperature is 13°C (55°F), chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.

If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.