Mariehamn Climate: Weather by Month and Best Time to Visit

Best months for Mariehamn: July, August.

Best time to visit

Year at a glance

Jan 4.2 Feb 4.2 Mar 4.5 Apr 5.2 May 6.0 Jun 6.6 Jul 7.3 Aug 7.0 Sep 6.6 Oct 5.5 Nov 4.8 Dec 4.2

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	1°C	-1°C	43 mm	11	–	–	4.2
February	0°C	-2°C	29 mm	8	–	–	4.2
March	1°C	-1°C	28 mm	7	–	–	4.5
April	4°C	2°C	29 mm	7	–	–	5.2
May	8°C	6°C	33 mm	7	–	–	6.0
June	13°C	11°C	48 mm	8	–	–	6.6
July	17°C	15°C	48 mm	8	–	–	7.3
August	18°C	16°C	55 mm	10	–	–	7.0
September	14°C	12°C	54 mm	9	–	–	6.6
October	9°C	8°C	62 mm	12	–	–	5.5
November	6°C	4°C	60 mm	13	–	–	4.8
December	3°C	1°C	56 mm	13	–	–	4.2