Daughter is climbing Kilimanjaro in December. @Want to buy, Beg, or Rent a QUALITY LIGHTWEIGHT bag. for a month and a half. 10 days for a mission trip, 5 for a safari and 8 days climbing the mountain. Weather in December at 12,000 feet can get to - 15. most of the time on the mountain will be around 7500 ft and around 30 - 45.