Much of Botswana is covered with ancient windblown Kalahari sands
and the fossilised remains of a former desert. Landlocked, and
roughly central to the southern African sub-continent, Botswana
extends through nine degrees of latitude. These factors tend toward
considerable variation in climate, but a low average rainfall.
A very flat country with hilly areas along the Limpopo valley in
the east, Botswana is semi-arid with rainfall figures of between
600 mm in the north to 200 mm in the south-west. Temperatures can
be quite extreme - small quantities of water may freeze overnight
in winter (June, July) while in October and November day temperatures
can reach 40?C or more.