Niamey, Niger Climate & Monthly Averages
Niamey has a tropical wet-and-dry climate. May is the hottest month, averaging 105° by day; January is the coldest at 90°.
Niamey's climate runs on sunshine and sparse rain
Warmth is the constant in Niamey: 85°F (29°C) averaged across all twelve months, never dropping below 90°F (32°C) even in January. August is the wettest month at 6.1 inches (155 mm).
What the dry climate changes
January is the coolest month, with highs of 90°F (32°C) and lows near 62°F (16°C). At its warmest, in May, Niamey runs to 105°F (41°C) in the afternoon and back to 84°F (29°C) by dawn. May is the brightest month at 11.0 hours of sun a day, against an annual average of 10.5 - sunnier than roughly 82% of the cities we track.
Days and nights are about 13°C apart on average - wider than 94% of the 3496 cities in our dataset. The wettest month is August (6.1 inches (155 mm) across 16 days) and the driest January. 8 months average under 20 mm of rain, the longest unbroken stretch running October through May. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 112°F (44°C) and the lowest daily minimum 53°F (12°C).
More climate facts for Niamey
- Hottest month: May - highs near 105°F (41°C)
- Coldest month: January - highs near 90°F (32°C)
- Decade extremes (2015-2024): 112°F (44°C) high · 53°F (12°C) low
- Wettest month: August (16 rainy days) · Sunniest: May (11.0 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 11°C between the average warmest and coolest month · day to night: 13°C
- Months averaging 30°C or hotter: 12
- Average humidity: 37%
Heat, cold and scarce precipitation in the dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
When the dry weather is easiest to use
Avoiding the hardest heat or cold
Aim for September to November and January to February if you get the choice: humidity and rainfall are at their lowest, which is what actually varies here, and highs average 96°F (35°C) against roughly 2 wet days a month. For the same question asked the other way round, see where else is warm in September.
Prepare for sun and cooler nights
Pack for Niamey with lightweight, breathable clothing and serious sun protection and rain gear if you travel around August. Note the gap between afternoon and night: May pairs 105°F (41°C) with 84°F (29°C).
Monthly heat and rainfall table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 90° | 62° | 0 | 0.0 in | 10.3 h/day | 11.4 h | 0% | 15% |
| February | 95° | 66° | 0 | 0.0 in | 10.6 h/day | 11.7 h | 0% | 13% |
| March | 102° | 74° | 0 | 0.0 in | 10.8 h/day | 12.0 h | 1% | 14% |
| April | 106° | 79° | 0 | 0.0 in | 10.9 h/day | 12.4 h | 1% | 20% |
| May | 105° | 84° | 2 | 0.3 in | 11.0 h/day | 12.7 h | 6% | 36% |
| June | 100° | 82° | 5 | 1.3 in | 10.8 h/day | 12.9 h | 18% | 50% |
| July | 94° | 78° | 12 | 3.0 in | 10.2 h/day | 12.8 h | 37% | 64% |
| August | 89° | 76° | 16 | 6.1 in | 9.3 h/day | 12.6 h | 53% | 75% |
| September | 93° | 77° | 7 | 1.8 in | 10.2 h/day | 12.2 h | 23% | 68% |
| October | 99° | 76° | 2 | 0.3 in | 10.6 h/day | 11.8 h | 5% | 44% |
| November | 97° | 69° | 0 | 0.0 in | 10.9 h/day | 11.5 h | 0% | 22% |
| December | 91° | 64° | 0 | 0.0 in | 10.6 h/day | 11.3 h | 0% | 18% |
How daytime heat and cool nights change by month
Each card shows the average high and low. The bar places that month between Niamey's coldest night and warmest afternoon.
January
- Rain
- 0 days
- Sunshine
- 10.3 h
- Daylight
- 11.4 h
February
- Rain
- 0 days
- Sunshine
- 10.6 h
- Daylight
- 11.7 h
March
- Rain
- 0 days
- Sunshine
- 10.8 h
- Daylight
- 12.0 h
April
- Rain
- 0 days
- Sunshine
- 10.9 h
- Daylight
- 12.4 h
May
- Rain
- 2 days
- Sunshine
- 11.0 h
- Daylight
- 12.7 h
June
- Rain
- 5 days
- Sunshine
- 10.8 h
- Daylight
- 12.9 h
July
- Rain
- 12 days
- Sunshine
- 10.2 h
- Daylight
- 12.8 h
August
- Rain
- 16 days
- Sunshine
- 9.3 h
- Daylight
- 12.6 h
September
- Rain
- 7 days
- Sunshine
- 10.2 h
- Daylight
- 12.2 h
October
- Rain
- 2 days
- Sunshine
- 10.6 h
- Daylight
- 11.8 h
November
- Rain
- 0 days
- Sunshine
- 10.9 h
- Daylight
- 11.5 h
December
- Rain
- 0 days
- Sunshine
- 10.6 h
- Daylight
- 11.3 h
Looking for warmer alternatives? Browse warm places by month, or compare Niamey's coolest part of the year: August, January, December.
Heat and cold across the Niamey year
March through May
March through May turns very hot here - highs near 104°F (40°C), nights near 79°F (26°C), and precipitation is sparse, near 9 mm (0.4 in) for the season. Daylight is generous - around 10.9 hours of sun a day.
June through August
June through August in Niamey is punishingly hot, with daytime highs averaging 95°F (35°C) and nights around 78°F (26°C); rain falls on around 33 of the 90 days. Daylight is generous - around 10.1 hours of sun a day.
September through November
September through November is punishingly hot here - highs near 96°F (36°C), nights near 74°F (23°C), and rain comes on about 9 days over the three months. Daylight is generous - around 10.6 hours of sun a day.
December through February
December through February in Niamey is punishingly hot, with daytime highs averaging 92°F (33°C) and nights around 64°F (18°C); precipitation is essentially absent. Daylight is generous - around 10.5 hours of sun a day.
How unusual is Niamey?
- Niamey averages 85°F (29°C) across the year - warmer than any other city in our 3496-city dataset.
- 85% of the year's precipitation falls in its wettest three months - more seasonal than any other city in our 3496-city dataset.
- Relative humidity averages 37% - drier than almost every other city we track.
These comparisons use the same ten-year window for every city in the dataset.