Helsinki Weather in September

Cool, with some rainy days. Average highs of 15°C and lows of 10°C, with around 10 rainy days expected throughout the month.

While September isn't our top-rated month for Helsinki, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.

Average high

15°C

Average low

10°C

Rainy days

10 days

Best months to visit

Year-round

What to do in Helsinki in September

Whatever the weather, Helsinki rewards curious visitors. Here are some of the best ways to spend your time:

Sauna culture immersion and thermal baths Uspenski Cathedral and church visits Design district shopping and museums Island hopping by ferry to Suomenlinna fortress Market Square and harbor dining Design Museum and Kiasma contemporary art

What to pack for September

Layer up — a mid-weight jacket, jumpers, and comfortable trousers. Waterproof shoes are recommended. Scarves and gloves may be useful in the evenings.