Juba International Airport lies in the tropics at 4.87° N, 31.60° E, on Africa/Juba time (UTC+2). Tropical airports contend with heat and humidity, both of which thin the air and lengthen takeoff runs, and with convective storms that build fast in the afternoon.
Juba International Airport has 1 runway. The longest, 13/31, measures 10,171 ft by 148 ft, which puts the field in the long-haul capable category: widebodies operate comfortably, though the very longest sectors may need a payload trade. The surface is asphalt. It is lit for night operations.
Runway 13/31 is aligned roughly south-east/north-west, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. Every runway here shares that south-east/north-west alignment, so a strong crosswind means a crosswind landing rather than a switch to another strip.