A semi-arid country possessing a climate generally characterized by low rainfall and low humidity, Namibia is a year-round destination, though the searing summer temperatures (Oct–Feb), which can exceed 40 degrees in some areas, deter many European visitors from holidaying at this time.
The peak tourist season in Namibia is in winter – June to September – which coincides with the dry season: there is virtually no rain and no cloud, so you’ll witness stunning night skies. It’s also easier to spot wildlife during these months as vegetation is sparse and animals are forced to congregate at established waterholes, worth considering when deciding the best time to visit. Days are sunny but average maximum daytime temperatures are more tolerable – 20–30 degrees, depending where you are – though they plummet at night: at the height of winter (June–Aug) they can drop to between 5 and 10 degrees, even reaching freezing in the desert and more mountainous areas. The downside of visiting in the Namibian summer is that lodge prices and visitor numbers are often higher, though since the country is so vast, only Etosha and Sossusvlei get really crowded.
Although climate change is making weather patterns less predictable, the rains usually start in earnest in late November or early December, transforming the landscape into a green carpet, and tailing off in March or April. Rain generally falls in the late afternoon as intense thundershowers, so is unlikely to spoil your trip. The countryside is more scenic at this time; animals are breeding; and the birdlife is at its best, with many migrants present. On the other hand, wildlife-spotting is much more difficult as the vegetation is denser, and with food more readily available, animal movements are less predictable since they are not restricted to waterholes.
Generally, Namibia is hotter and drier in the south, and wetter in the far north and across the Zambezi Region. Indeed, the far northeast and the Zambezi Region possess a sub-tropical climate, receiving on average close to 500mm of rain between December and February. In the months of September and October, before the main rains arrive, the humidity and temperatures build and it can be very uncomfortable. In contrast, much of the country receives very little precipitation, even in the rainy season. The nearer the coast you get the less rainfall there is – under 15mm annually in some places – though a thick morning fog hangs in the air for much of the year on the coast itself, which can make it feel unpleasantly cold.