May · Finland
Best time to visit Helsinki in May Weather, crowds & prices
Weather in Helsinki in May
Average temperature 10°C, 34 mm of rain, about 29 days with 6+ hours of sunshine and 67% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
9.0/10
Ranked #2 of 12 months
- Avg temp
- 10°C
- Rainfall
- 34 mm
- Humidity
- 67%
- Days with 6h+ sun
- 29
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Helsinki scores 9.0/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 10°C, 34 mm of rain, and roughly 29 days with 6+ hours of sunshine this month.
Helsinki spreads across a Baltic archipelago, with a design-led center, ferry-linked islands, and a strong sauna habit.
May ranks 2nd of 12 for Helsinki — one of the best windows
Expect 10°C (50°F) in May. A good month for city streets, viewpoints and long meals; leave swimming for another season.
With around 34 mm of rain, any showers tend to pass through rather than settle in; about 29 days with 6+ hours of sunshine and 17.3 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Helsinki at 9/10 (2nd of 12), just behind June at 9.6/10.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Helsinki in May?
- In May, Helsinki averages 10°C, 34 mm of rain, and about 29 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is May a good time to visit Helsinki?
- May earns a 9.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Helsinki in May?
- Expect about 34 mm of rain in May. Average humidity is 67% and there are about 29 days with 6+ hours of sunshine.
Curated in Helsinki
Tickets & experiences
Things to do in Helsinki
Helsinki, Finland. Live activities and tours from GetYourGuide, matched to this destination.