Climate and monthly weather forecastNiamey, Niger

The climate of Niamey

Niamey, being the capital city of Niger, lies geographically in the Subtropical steppe zone. Classified under the BSh category through the Köppen climate classification, Niamey is predominantly warm throughout the year. The city's climatic variations are far from drastic, but the data demonstrates a noticeable pattern dependent on the seasons.

The temperature range varies from lesser degrees, recorded at 16.9°C (62.4°F), to soaring highs, topping 42.2°C (108°F). A constant trend indicates a gradual increase in highs and lows from January through to April, following which they plateau throughout the summer months and then taper off towards the year-end. Relative humidity follows an inverse pattern with the temperatures, starting the year at around 14% and gradually increasing up to a peak of 55% during the height of the rainy season in August, then receding back down to 14% by December.

Rainfall presents a distinct pattern, with dry months from November to March marked by almost no precipitation. The situation changes dramatically from April onwards when rainfall shoots up, peaking in August at 42mm (1.65") before it starts falling back down again.

The best time to visit Niamey

Niamey is at its tourism prime during the early months of autumn, specifically from September to November. During this time, the temperatures begin to fall, averaging between 33.5°C (92.3°F) and 38.5°C (101.3°F), and the humidity begins its gradual decrease. Alongside this, the rainfall is relatively low but not entirely absent, alleviating some of the high temperatures. The daylight hours remain generous with more than 11 hours, ensuring plenty of time to engage in outdoor activities.

The worst time to visit Niamey

Planning a visit during the summer months might not work favorably for travelers due to harsh conditions that encompass high temperatures and humidity. Specifically, from May to August, the city experiences peaks in both temperature and humidity. Additionally, Niamey receives the highest amount of precipitation in these months. The challenging weather conditions alongside high average temperatures exceeding 39°C (102.2°F) can be uncomfortable and deter outdoor activities.

Spring weather in Niamey

Spring, from March through to June, sees a significant shift in the weather pattern. The average high temperature ranges from 40.3°C (104.5°F) to 41.8°C (107.2°F), and the lows fluctuate from 23.5°C (74.3°F) to 30.4°C (86.7°F). Humidity starts to surge from spring and peaks in summer. Simultaneously, the city experiences an onset of rainfall, gradually increasing from 1mm (0.04") in March to 12mm (0.47") in June.

Summer weather in Niamey

The summertime in Niamey from June to September is characterized by high temperatures, elevated humidity, and increased rainfall. The highest temperatures range from 39.8°C (103.6°F) to 36.8°C (98.2°F), while the average low temperatures hover between 30.4°C (86.7°F) and 28.2°C (82.8°F). Maximum rainfall is observed in August with an exceptional 42mm (1.65"), accompanied by increased humidity, driving the relative humidity up to 55%.

Autumn weather in Niamey

Autumn, from September to November, is a transitional phase where Niamey’s weather begins to cool down. The highest temperature decreases from 36.7°C (98.1°F) to 37°C (98.6°F), and the lowest varies between 26.9°C (80.4°F) to 23.3°C (73.9°F). Rainfall starts to diminish, averaging 9mm (0.35") in September, to a mere 0mm (0") by November. The daylight hours also lessen slightly but still provide ample sunlight.

Winter weather in Niamey

Winter sees a marked improvement in the climatic conditions from December through to February, making it an ideal time for local exploration. The high temperatures range from 33.5°C (92.3°F) to 37°C (98.6°F) while the average low temperature varies between 16.9°C (62.4°F) to 20°C (68°F). Precipitation remains virtually nonexistent during these months, with a relative humidity dropping to 15% by February. The ample sunshine and cooler temperature present a refreshing change from the summer’s heat and humidity.

Weather in January

The climate in Niamey, Niger, begins the year with a typically dry season. Following a chilly season in December, January brings in an increase in mean temperatures. Clear skies dominate the weather, resulting in an impressive 9.8 hours of sunshine each day. Weather in January »

Weather in February

The arid conditions persist into February, as Niamey continues its journey through the dry period. Temperatures see a slight climb from January's averages, signalling a warming trend. February still maintains low cloud cover, allowing for unimpeded sunlight around the clock. Weather in February »

Weather in March

In March, Niamey experiences a continued escalation in temperatures while moving deeper into the dry season. With the UV index reaching a heightened 8, protective measures against sunburn are recommended in the plentiful sunshine. Weather in March »

Weather in April

Commencing the second quarter of the year, the climate in Niamey turns significantly warm, punching in a high stretch of temperatures. April witnesses a distinct improvement in humidity levels, resulting in muggy mornings and warm afternoons. Weather in April »

Weather in May

Come May, the environment in Niamey sees the onset of the much-awaited wet season, marking a weather pattern redesign as the dry and arid conditions begin to alleviate. The weather introduces the concept of rain, with the quantity peaking to 7mm (0.28"), making this the first rainfall-maximum month. Weather in May »

Weather in June

June in Niamey ushers in an evident shift towards a wetter climate. With the arrival of the summer solstice, daylight peaks with a remarkable 12.9 hours of shine. On the flipside, this month exhibits a slight drop in the amount of full sunshine days at 23.5. Weather in June »

Weather in July

July showcases Niamey in a full-blown wet season mode. The temperature readouts plateau, providing relief from the constant escalation of the preceding months. The impressive rainfall and frequency of rainy days make it evident that the city is at the peak of its wet season. Weather in July »

Weather in August

Dominating the climatic conditions, August records the highest rainfall amount of the year at 42mm (1.65"). Subdued temperatures bring relief from the intense heat of the prior months. Humidity also records its peak, making the weather feel warmer than it is, however, the rainfall provides a respite. Weather in August »

Weather in September

As the wet season draws to a close, September in Niamey witnesses a gradual return of the hot and arid conditions typical of this Sahelian landscape. A fair decrease in rainfall from August's peak is observed, dropping more than a threefold to 9mm (0.35"). Weather in September »

Weather in October

October brings a significant decline in precipitation, from 9mm (0.35") in September to barely 7mm (0.28") this month. The weather adopts a milder stance as the cool, dry season starts to set in. The skies, once cloud-covered, are now vacant, allowing the sun to reinstate itself prominently. Weather in October »

Weather in November

With the wet season far behind, Niamey in November relishes the virtues of the dry season again. The return of the dry spell is quite evident as the rainfall seizes completely. Skies clear up further, offering unbridled sunshine. Weather in November »

Weather in December

The final month in Niamey, marking the end of a year-long weather cycle, is characterized by peak aridity. The cold, dry winds blowing at 14.7km/h (9.1mph) are reminiscent of January, indicating a full-cycle completion of Niamey's weather. Weather in December »