Sossusvlei is not as dramatically affected by the seasons as other parts of Namibia, which means that it is a fine year-round destination. However, if one had to choose an ideal time to visit, it would be during the interim seasons: autumn, from mid-March to mid-May, and spring, from mid-August to mid-October. Temperatures are more moderate during these periods, with average maximums of 30°C - 33°C (86°F - 91°F) and minimums in the range of 10°C - 15°C (50°F - 59°F).
Winter (mid-May to mid-August) offers optimal daytime temperatures for activities, as maximums hover around a pleasant 27°C (81°F). Minimums, however, occasionally dip to freezing point. The east wind makes an occasional pest of itself in the winter months, blasting an unseasonably hot, sandy wind across the desert en route to the coast. Luckily these nasty spells are scanty and only last a few days.
Summer can be a scorcher, particularly in the months before the rains have fallen (October & November). During this period, the mercury can push past 40°C (104°F). The inland rains cool down the interior a bit from December to February.