Asmara is the largest city and capital of Eritrea
The dry season from December to April is distinguished by the terrain of red-brown, rusty, beige or black rubble surrounding the city, resembling photos from Mars. The vegetation consists largely of shrubbery, eucalyptus, aloes, cacti and the odd explosively colorful specs of bougainville, jacaranda or other ornamental plants.
The rainy season between May and September (hopefully) brings torrents of rain and needed nourishment to the land, which transforms itself from lunar/marsian-esque to verdant and grassy in the post-rain months of August to October.
Regardless of when you go, temperatures in Asmara rarely sore above a comfortable dry 30°C in the sun. The capital is known for its lovely climate. There is very little humidity in the air so the biggest variations in temperatures occur between night and day, or whether one is standing in the sun or in the shade, not between seasons. Between December and February, it can get very cold at night and in the morning, it can even drop a few degrees below 0 Celsius. Due to lack of heating and insulation in Asmara, it is important to bring proper clothes. Rains only last a few hours at a time and it all dries up quickly enough, although the occasional flash flood is not uncommon during the rainy season.