Northern Europe in May

June through August brings midnight sun and festival seasons, but also peak prices and crowds that can overwhelm smaller cities like Bergen or Tallinn. July offers the warmest weather but expect accommodation costs to double. Late May and early September provide better value with decent weather and fewer tour groups clogging up photo spots. December transforms the region with Christmas markets and northern lights possibilities, though daylight hours shrink dramatically. Stockholm's December markets along Gamla Stan feel authentically medieval, not manufactured for tourists. Winter sports season runs January through March, with reliable snow in Norwegian mountains and Finnish Lapland. But here's what guidebooks won't tell you - April and October offer the best photography light and empty attractions, though weather becomes unpredictable. Northern lights viewing peaks from September through March, with clearest skies often in February and March.