The southern and western parts of Norway, fully exposed to Atlantic storm fronts, experience more precipitation and have milder winters than the eastern and far northern parts. Areas to the east of the coastal mountains are in a rain shadow, and have lower rain and snow totals than the west. The lowlands around Oslo have the warmest  summers, but also cold weather and snow in wintertime. The sunniest weather is along the south coast, but sometimes even the coast far north can be very sunny -  the sunniest month with 430 sunhrs was recorded in Tromsø.