Verdict: Good month
Helsinki Weather in May
May is mild-to-cool in Helsinki, topping out near 13°C (55°F) — comfortable with a layer on. Expect showers on roughly 9 days of the month — rarely trip-ruining, worth planning around. Overall, May is a solid month to visit Helsinki.
Average high
13°C / 55°F
Average low
6°C / 43°F
Rain days
~9
Precipitation
51 mm
What to pack for Helsinki in May
- Layers — t-shirts under a light jacket or sweater
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
May against the rest of the year
Warmest in Helsinki: Jul (21°C / 70°F) · Coolest: Jan (0°C / 32°F) · Wettest: Jan (~16 rain days)
0°
-5°
Jan
0°
-5°
Feb
2°
-4°
Mar
7°
0°
Apr
13°
6°
May
20°
12°
Jun
21°
14°
Jul
20°
14°
Aug
16°
10°
Sep
10°
6°
Oct
5°
1°
Nov
0°
-4°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)