The climate of Samsø is Baltic, that is to say, relatively continental, with cold winters and mild to pleasantly warm summers.
The small island of Samsø is located east of Jutland, in central Denmark.
The average temperature of the coldest month (February) is of 1.4 °C (34 °F), that of the warmest month (August) is of 17.4 °C (63 °F). Here are the average temperatures in Tranebjerg.
Tranebjerg - Average temperatures
Min (°C)0014811131411841
Max (°C)3361015182121171275
Min (°F)323234394652555752463934
Max (°F)373743505964707063544541

Precipitation amounts to 550 millimeters (21.7 inches) per year: so, it is at an intermediate level. It ranges from 30 mm (1.2 in) in the driest month (February) to 60 mm (2.4 in) in the wettest (June). Here is the average precipitation.
Tranebjerg - Average precipitation

The sea temperature ranges between 3 °C (37 °F) and 18 °C (64 °F). So, it never becomes warm for swimming (if not for Northern Europeans). Here are the average sea temperatures.
Samsø - Sea temperature
Temp (°C)323610141718161295
Temp (°F)373637435057636461544841


Best Time

The best time to visit Samsø is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.