April in northeast Greenland can experience all manner of arctic winter conditions. This can vary from perfectly calm days with clear skies and day time temperatures rising to -5 degrees C, to extreme blizzards and whiteout conditions with night time temperatures of -30 degrees C (not accounting for further wind chill). All competitors must be suitably experienced and equipped to deal with such conditions. Average day and night time temperatures are around -15 to -20 degrees C. Camping will be in full Arctic winter conditions throughout. Several hours dusk/darkness will be experienced between the hours of approximately 10pm and 6am. Weather can change rapidly in Greenland. Tents should always be pitched and secured in a safe manner as if an extreme storm was expected at any time. Strong and sufficiently high snow walls should be built to protect camp sites from the affects of storm force winds, taking in to account possible wind direction changes.