The Ngorongoro Conservation Area is a vast area with altitude ranging from 1009 to 3645m (3310-11959ft). They spend the night in a lodge or campsite on the crater rim and visit the crater floor for wildlife viewing. Both the rim (about 2300m/8530ft) and floor (about 1700m/5577ft) are at high altitude and are colder than the overall conservation area. Temperatures drop by about 6.5°C for every 1000m you climb (or 3.5°F per 1000ft). The difference is more noticeable during the night. Afternoons on the crater floor will be pleasant, but it can freeze on the crater rim at night. The rim also receives quite a lot of rain.