Home › Cities › Niger › Niamey
Niamey, Niger climate
BSh Hot semi-arid
Niamey has a mildly seasonal tropical climate (Hot semi-arid, Köppen BSh). The hottest month is April with an average daily high near 42°C, while the coldest is January averaging around 17°C at night. Precipitation totals about 588 mm a year and is strongly seasonal — August alone averages 201 mm while December barely receives 0 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Niamey climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 36 | 39 | 42 | 41 | 38 | 35 | 33 | 35 | 38 | 37 | 34 |
| Avg temp (°C) | 25 | 28 | 32 | 35 | 35 | 32 | 30 | 28 | 30 | 32 | 29 | 26 |
| Avg low (°C) | 17 | 20 | 24 | 28 | 29 | 27 | 25 | 24 | 25 | 25 | 21 | 18 |
| Precipitation (mm) | 5 | 0 | 2 | 21 | 35 | 85 | 137 | 201 | 79 | 19 | 4 | 0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 36 | 39 | 42 | 41 | 38 |
| Avg temp (°C) | 25 | 28 | 32 | 35 | 35 | 32 |
| Avg low (°C) | 17 | 20 | 24 | 28 | 29 | 27 |
| Precipitation (mm) | 5 | 0 | 2 | 21 | 35 | 85 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 35 | 33 | 35 | 38 | 37 | 34 |
| Avg temp (°C) | 30 | 28 | 30 | 32 | 29 | 26 |
| Avg low (°C) | 25 | 24 | 25 | 25 | 21 | 18 |
| Precipitation (mm) | 137 | 201 | 79 | 19 | 4 | 0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 27 | 26 | 45 | 56 | 61 | 60 | 64 | 71 | 54 | 40 | 28 | 24 |
| Relative humidity (%) | 20 | 16 | 15 | 24 | 40 | 51 | 62 | 74 | 71 | 52 | 28 | 23 |
| Wind speed (mph) | 7.3 | 7.2 | 6.5 | 6.0 | 7.1 | 7.3 | 6.2 | 4.6 | 4.2 | 4.2 | 5.1 | 6.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 27 | 26 | 45 | 56 | 61 | 60 |
| Relative humidity (%) | 20 | 16 | 15 | 24 | 40 | 51 |
| Wind speed (mph) | 7.3 | 7.2 | 6.5 | 6.0 | 7.1 | 7.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 71 | 54 | 40 | 28 | 24 |
| Relative humidity (%) | 62 | 74 | 71 | 52 | 28 | 23 |
| Wind speed (mph) | 6.2 | 4.6 | 4.2 | 4.2 | 5.1 | 6.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Diori Hamani, a weather station, about 9 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.