Niger has a highly diverse climate, with major differences between regions. Annual temperatures range from lows of -20°C in the coldest regions to highs of 32°C in the warmest areas. Precipitation is relatively consistent across the country, ranging between 196mm and 393mm annually. Some regions receive significant snowfall, with up to 393cm annually, while other areas see little to none. The warmest areas are hot year-round while the coldest regions remain very cold, making Niger a country of sharp climate contrasts.

Temperature patterns across Niger vary by region, with distinct differences between areas. The Southeast is the warmest part of the country, with peak temperatures reaching 32°C and an annual average of 26°C. Cooler conditions are found in the South, where winter lows drop to -20°C and an annual average of -11°C. This 37°C difference in annual averages between regions means travellers can experience vastly different conditions depending on which part of Niger they visit. Regional differences are most pronounced in winter, when temperatures across Niger can vary by up to 43°C between regions. For example, Diffa in the Diffa averages 26°C annually, while Magaria in the Zinder averages -11°C.

Precipitation across Niger is moderately consistent, with regional totals ranging between 196mm and 393mm annually. The Southwest receives the most rainfall, at approximately 393mm annually. The Southwest is the driest, with around 196mm per year. Rainfall is distributed fairly evenly across the seasons, with no strong wet or dry period in most regions. The Southwest sees the most snowfall, with up to 393cm annually, while other parts of the country receive little to none. Visitors heading to wetter areas can expect more frequent rain than those staying in drier parts of the country.