Finland in May: Weather, Crowds & What to Expect
Climate Map for May
Average temperature across Finland in May.
City Weather in May
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Helsinki | 14° | 6° | 32 mm | moderate | Cold |
| Espoo | 14° | 5° | 32 mm | moderate | Cold |
| Tampere | 15° | 4° | 35 mm | moderate | Cold |
| Vantaa | 15° | 5° | 34 mm | moderate | Cool |
| Oulu central locality | 12° | 3° | 34 mm | moderate | Cold |
| Turku | 16° | 5° | 35 mm | moderate | Cool |
| Jyväskylä | 15° | 4° | 36 mm | moderate | Cold |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Southern Finland (Helsinki, Espoo, Porvoo)
May in the south is often pleasantly cool and green, with daytime highs commonly in the mid-teens and long evenings that invite outdoor cafés and ferry hops to nearby islands. The city’s outdoor culture wakes up - harbor walks, cycling and the start of archipelago services - although sea temperatures remain low for swimming. Late-May is the practical time to pack a lightweight down jacket plus a rain shell and to reserve accommodation for Midsummer if travelling in June.
Southwest Finland & Åland Archipelago (Turku, Turku Archipelago, Åland)
May is reliably the best shoulder-season month here: daytime temperatures are pleasant, island cafés reopen and the archipelago’s lanes become ideal for cycling and sailing. Åland’s gardens and low hedgerows bloom; tourist services ramp up, so booking island accommodation becomes worthwhile. Mosquitoes are typically less troublesome than inland lakes, but a light insect repellent is still sensible for evenings.
Lakeland & Eastern Finland (Tampere, Kuopio, Savonlinna, Koli)
May is when the Lakeland really wakes: birch leaves unfurl, cottage life returns and many smaller roads become passable as ice breaks on inland waterways. Migratory birds arrive and islands in larger lakes become accessible by boat; water is still cold but daylight is long and inviting for boating. Mosquitoes start to appear by late May near still water, so insect repellent and a net can be life-changing for evening cottage stays.
Central & Western Finland (Jyväskylä, Vaasa, Päijänne)
May is mild and increasingly green, with longer evenings that make lakeside terraces and hiking attractive; cycling routes around Päijänne re-open in earnest. Vaasa’s coastal climate feels slightly warmer on sunny days, and island day-trips become more practical. Keep a light rain jacket handy and be ready for brisk winds on exposed headlands.
Lapland & Northern Finland (Rovaniemi, Inari, Kilpisjärvi, Saariselkä)
May in Lapland is a month of rapid change: snow retreats from lower valleys, rivers swell from melt and the landscape begins to green, although patches of snow remain on ridges and at higher altitudes. The midnight sun arrives toward late May in the far north, filling the nights with light and making it a memorable time for hiking and long photographic days. Mosquitoes are not yet at their peak, but bring basics for evenings.