Climate Insights for Niamey

The climate in Niamey is hot. The average annual temperature is 30°C and approximately 275mm of precipitation falls per year. August is the wettest month, receiving around 140mm of rainfall. Niamey is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 17°C.

Temperatures in Niamey vary considerably across the year, with a 24°C difference between the coldest and warmest months. April is the hottest month, with daytime highs reaching 41°C and an average of 34°C. January is the coolest month, with minimum temperatures around 17°C and an average of 24°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 5°C shift in average temperatures.

Niamey is a quite dry location, receiving approximately 275mm of precipitation annually, which averages out to around 23mm per month. The wettest month is August, averaging 140mm of rainfall. July and September also tend to see above-average precipitation. The driest month is January, with just 0mm. That's 140mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Niamey is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in October, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months.

It is currently spring in Niamey, which began on March 20, 2026. Niamey is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 41°C, while the coldest stretch bottoms out in January near 17°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Niamey is during January and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 0mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 41°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Niamey based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.