Why Astronomy in Botswana ?
Map of World Cloud Cover Averaged from 2002 to 2015 (NASA)
The rainy season in Botswana begins in October and finishes in April. The 5 months in between have little to no rain resulting in mostly clear nights – ideal for astronomical observation. While this year, 2021, has recorded higher than average rainfall in many parts of the country, some years record no rain from April through October, giving 7 months of potential clear viewing conditions.
The months of June, July and August rarely experience any rainfall and allow for the long-term planning of astronomical viewing and imaging events, trips and educational opportunities.
Original chart compiled by ASB with data extracted from various sources