What May feels like in Helsinki
In Helsinki, May brings late spring. Afternoons are cool, pleasant for walking as long as you keep a layer on. There is little difference between day and night: nights are cold, and evenings feel much like the afternoon. The air is damp, which makes cool temperatures feel colder, particularly in wind.
Rain in Helsinki in May
It is a changeable month: rain comes about one day in 3, with dry spells in between. Each rainy day adds about 5 mm (0.2 in), a proper wetting rather than a sprinkle. Across the year Helsinki averages about 5.2 mm per rainy day, so May is typical.
Daylight and sunshine in May
In mid-May, sunrise is at about 4:43 am and sunset at about 9:50 pm (local time) — 17 h 7 min of daylight. The days are stretching out — 2 h 37 min more daylight than mid-April. Measured sunshine covers about 75% of the daylight — there are plenty of bright spells.
How May compares to the rest of the year
Ranked by average high, May comes out as the 5th warmest month in Helsinki. Compared with April, afternoons are 6.4°C (11.5°F) warmer, with 8 mm more rain. June continues the upward trend. The next month's average high: 18.3°C (64.9°F).
Who May suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: less ideal — too cool to sit outside for long.
- Beach: less ideal — the sea air is too cool.
Tips for visiting Helsinki in May
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Light Jacket
A light jacket or knit layer is enough for most of the day.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Helsinki in May?
Afternoons average 13.6°C (56.5°F) and nights about 6.3°C (43.3°F) — cool by most people's standards. It is the 5th warmest month of the year.
Does it rain a lot in Helsinki in May?
It does: about 10 rainy days bring roughly 50 mm, so plan some indoor options.
What should I wear in Helsinki in May?
The numbers point to rain protection, a light jacket and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is May or June better for visiting Helsinki?
On our 12-month climate ranking, May comes out ahead (#1 of 12 vs #2). June is warmer and has more rainy days.