The summer months, when travel is recommended, are characterized by weather conditions permitting all types of outdoor activities: Temperatures then can climb as high as 68 F/20 C in the coastal areas. Summer is short, however: Travelers usually visit in July, August and early September. Snow remains a possibility at any other time. Winters are long, cold and dark -- the wind rarely abates, snow covers the entire island six-to-nine months of the year. Low temperatures in January.