To most foreign climbers Norway is known for Romsdal's Troll Wall (which is now sadly loose after several major rockfalls) and, in winter, an endless supply of frozen waterfalls. This is of course a gross simplification of what really exists in Norway, but the frozen waterfall part is pretty much correct. Due to its renowned wet climate Norway offers an incredible amount of climbed and unclimbed waterfalls. The most accessible waterfalls have mostly been climbed, and there are a couple of venues that have gained more popularity than others. One of these is Rjukan in the central southern region of Norway. Rjukan is situated in a valley, and the town centre sees no sun during the winter months. The location also contributes to a stable cold climate and the valley almost comes with an "ice guarantee". This location coupled with lots of waterfalls running down from the mountains above makes this a perfect arena for the game of ice climbing.
As previously mentioned, most of the waterfalls at Rjukan are protected from the sun. The earliest ascents recorded at Rjukan have been done in the beginning of October but this month is obviously not a good choice. If you want the best conditions, with stable ice that has settled, you should consider mid December to the end of March, with February as prime time. January has got short days, but mostly good conditions. February is much like January, but also provides longer days. The average temperature for January and February is -6.5 C to -7.5 C, but you can encounter -25 C or less if you are unlucky. Periods of extremely cold weather are usually not long (2-3 days).
Ryanair.com offer cheap flights to Norway from Stanstead, Liverpool, Newcastle and Glasgow (Prestwick) to Sandefjord airport Torp (referred to as Oslo airport Torp by Ryan Air). From there you can choose either to go by bus to Rjukan, or more practically hire a car.
The Guidebook (Out of Print)
The guidebook, Heavy Water - Rjukan Ice, describes 171 waterfalls across the area with full-colour photo-topos and detailed maps. This guidebook is the first Rockfax printed book to a Norwegian area and their first venture into Water Ice climbing. Areas reresented include: Krokan, Upper Gorge, Vemork, Lower Gorge, Rjukan Centre, and many more. The author of this article, Tom Atle Bordevik, is one of the authors of the book.