Niamey is warmest in April, averaging 42° by day and 26° at night. The wettest month is August with 233 mm, and the year brings about 645 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 33° | 16° | 0 mm | 11.3 h | Beach weather |
| February | 35° | 19° | 0 mm | 11.6 h | Beach weather |
| March | 40° | 23° | 0 mm | 11.9 h | Very hot |
| April | 42° | 26° | 0 mm | 12.3 h | Very hot |
| May | 41° | 28° | 19 mm | 12.6 h | Very hot |
| June | 37° | 27° | 84 mm | 12.8 h | Very hot |
| July | 34° | 25° | 167 mm | 12.7 h | Mild |
| August | 31° | 24° | 233 mm | 12.5 h | Rainy season |
| September | 32° | 24° | 126 mm | 12.1 h | Mild |
| October | 35° | 23° | 16 mm | 11.7 h | Beach weather |
| November | 34° | 20° | 0 mm | 11.4 h | Beach weather |
| December | 32° | 16° | 0 mm | 11.2 h | Beach weather |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: January, February, October, November and December — highs around 34°, nights no colder than 16°, and at most 16 mm of rain in a month.
Wet season: August — up to 233 mm in a single month.
Serious heat: In March, April, May and June the average high reaches 42°.