Diffa, Niger climate
BWh Hot desert
Diffa has a mildly seasonal tropical climate (Hot desert, Köppen BWh). The hottest month is May with an average daily high near 42°C, while the coldest is January averaging around 14°C at night. Precipitation totals about 347 mm a year and is strongly seasonal — August alone averages 140 mm while January 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)Diffa climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 34 | 39 | 42 | 42 | 40 | 36 | 33 | 36 | 39 | 36 | 31 |
| Avg temp (°C) | 22 | 25 | 30 | 33 | 34 | 34 | 31 | 28 | 30 | 31 | 27 | 23 |
| Avg low (°C) | 14 | 16 | 21 | 24 | 26 | 27 | 25 | 24 | 24 | 22 | 18 | 15 |
| Precipitation (mm) | 0 | 2 | 0 | 1 | 4 | 39 | 73 | 140 | 58 | 30 | 0 | 0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 34 | 39 | 42 | 42 | 40 |
| Avg temp (°C) | 22 | 25 | 30 | 33 | 34 | 34 |
| Avg low (°C) | 14 | 16 | 21 | 24 | 26 | 27 |
| Precipitation (mm) | 0 | 2 | 0 | 1 | 4 | 39 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 36 | 33 | 36 | 39 | 36 | 31 |
| Avg temp (°C) | 31 | 28 | 30 | 31 | 27 | 23 |
| Avg low (°C) | 25 | 24 | 24 | 22 | 18 | 15 |
| Precipitation (mm) | 73 | 140 | 58 | 30 | 0 | 0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 28 | 28 | 45 | 59 | 60 | 59 | 67 | 69 | 59 | 49 | 37 | 31 |
| Relative humidity (%) | 19 | 15 | 12 | 15 | 24 | 37 | 53 | 66 | 59 | 34 | 21 | 21 |
| Wind speed (mph) | 8.5 | 8.6 | 8.5 | 7.2 | 6.1 | 6.3 | 6.7 | 5.2 | 4.6 | 5.4 | 7.8 | 8.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 28 | 28 | 45 | 59 | 60 | 59 |
| Relative humidity (%) | 19 | 15 | 12 | 15 | 24 | 37 |
| Wind speed (mph) | 8.5 | 8.6 | 8.5 | 7.2 | 6.1 | 6.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 69 | 59 | 49 | 37 | 31 |
| Relative humidity (%) | 53 | 66 | 59 | 34 | 21 | 21 |
| Wind speed (mph) | 6.7 | 5.2 | 4.6 | 5.4 | 7.8 | 8.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 22 years of daily observations at Diffa, a weather station, about 7 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.