Ash billows from the Eyjafjallajokull volcano on May 8, 2010 in Hvolsvoellur, Iceland. In 2010, Katla's neighboring volcano, Eyjafjallajokull, caused chaos across Europe and shut down most of the continent's airspace. Thousands of flights were grounded because of the volcanic ash following its eruption.
During winter overnight frost can occur. Usually no rainfall occurs between June and September. The annual precipitation average of the last 20 years for Windhoek is 370 mm. Of this 296 mm of rain were received from January until May, 5.2 mm from June to September and 76 mm from October to December.entral highlands around Windhoek. Between the Kalahari in the east and the Namib Desert in the west lies the Namibian central highland with the capital Windhoek in its centre. Due to its altitude of 1700 metres on average (at Windhoek even up to 2000m) this highland has moderate temperatures and average rainfalls.
As most of Namibia is covered by desert it is unsurprising that the climate is exactly what you would expect from a desert country. Daytime temperatures are hot (extremely hot in summer) and nights are cold, some areas frequently go below freezing in winter. Rainfall is sparse; with the northeastern areas of Namibia getting the most rain (this area is tropical) and rainfall decreasing as you travel south and westwards. The Namib desert runs along the coast and rain in this area is rare. The rainy season in central Namibia starts in January and runs until the middle of April, further north the rains begin earlier and as you travel south the season becomes shorter.