The Okavango Delta experiences heavy afternoon thunderstorms during the months between December and March, accounting for most of the annual rainfall. The hottest months are December to February where average daytime temperatures can soar as high as 104°F (40°C) and humidity is high.March to June are the most pleasant months to visit as the temperature cools down and average temperatures reach around 86°F (30°C) and nights are cooler. The winter months of June to September are dry and cold with night-time temperate dropping to close to freezing.