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Helsinki Weather in September

Finland

September offers mild temperatures and the start of autumn colors with noticeably fewer visitors, creating ideal conditions for photography enthusiasts and those seeking cultural experiences as locals return to routines and restaurants showcase seasonal menus.

Avg High

15°C

Avg Low

9°C

Daily Rain

1.7mm

Rainfall

Low

💡 Best months to visit Helsinki: Jul, Jun, Aug

Helsinki Weather by Month

Month	High	Low	Rain
Jan	-1°C	-5°C	3mm
Feb	-1°C	-7°C	2.1mm
Mar	2°C	-4°C	1.5mm
Apr	7°C	0°C	1.1mm
May	13°C	5°C	2.2mm
Jun	20°C	12°C	1.3mm
Jul	22°C	15°C	2mm
Aug	20°C	14°C	3.8mm
Sep	15°C	9°C	1.7mm
Oct	9°C	5°C	2.9mm
Nov	4°C	0°C	2.2mm
Dec	-2°C	-6°C	2.2mm

About Helsinki

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