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.
1 Total annual Precipitation averages 811 mm (31.9 inches) which is equivalent to 811 Litres/m (19.89 Gallons/ft).  On average there are 3002 hours of sunshine per year. Visit the sunshine and daylight section to check monthly details including how high in the sky the sun reaches each month.