Diffa, Niger experiences a hot and dry climate year-round. The hottest months are March to May, with temperatures often reaching above 40°C during the day. June to August is slightly cooler, but still warm, while September to November sees a slight decrease in temperature. The coolest period is from December to February, with temperatures averaging around 20-25°C. Despite these fluctuations, the region's dryness prevails throughout the year, with limited rainfall and high evaporation rates.