Weather in Niamey

On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are November, December, and January. Niamey is in Niger at 13.5°N. The 2001–2020 NASA POWER daily record describes a mild oceanic climate.

May is the warmest month (average 34.2°C, high 40.2°C) and January is the coolest (average 23.9°C, low 15.7°C). Rain is rainy season runs from June to September, inside an annual total of 546 mm. The wettest month is August at 190 mm; the driest is December at 0 mm.

Best months to visit Niamey

The three months with the highest comfort score are November, December, and January: November (27.7°C average, 0 mm, 29% humidity); December (24.9°C average, 0 mm, 23% humidity); January (23.9°C average, 0 mm, 19% humidity). Those months sit across the year end, so they are listed in season order rather than January-to-December. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the rainy season itself — fewer crowds, greener landscape, heavier rain — aim at June–September instead of the score.

How warm Niamey gets

Monthly average highs run from 32.1°C in January to 40.2°C in May. Nights follow the same curve: 15.7°C in January and 28.1°C in May.

Mean high across all twelve months is 35.7°C and mean low is 22.4°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

When Niamey gets wet

The rainy season in Niamey starts in June and ends in September (June, July, August, and September). August is the core of it at 190 mm. December is the other extreme, with 0 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. August averages 27 such days; December averages 0.

The calendar in Niamey

The year bottoms out in January. Plan for 15.7°C at night and 32.1°C in the afternoon. February: 35.7°C high, 18.8°C low, 1 mm rain, 16% humidity. In March, Niamey averages 39.2°C by day and 22.4°C at night, with 1 mm of rain. Peak heat arrives in May: 40.2°C by day, 28.1°C at night, and 40% humidity. The rainy season opens in June. Expect 81 mm and 17 rainy days, with nights around 26.7°C.

In July, Niamey averages 34.1°C by day and 24.8°C at night, with 138 mm of rain. August is the wettest month — 190 mm and 27 rainy days, with 75% humidity. September closes the rainy season: 84 mm over 17 rainy days, then the calendar dries. October stands apart from the months beside it: 35.9°C / 23.1°C and 20 mm. December is the driest month, averaging only 0 mm across 0 rainy days. Highs sit near 33.1°C.

How Niamey compares inside Niger

Niamey is the only Niger city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.