Nioro du Sahel climate — normals and trends
Nioro du Sahel (Mali) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 28.8 °C and it receives 377 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is May (34.4 °C on average) and the coldest is January (22.9 °C). Rainfall peaks in August.
Nioro du Sahel averages 0 frost days, 328 hot days (≥ 30 °C) and 53 rainy days per year.
Nioro du Sahel has warmed by +2.6 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.2 °C (on 21 May 1987) and the coldest 6.2 °C (on 17 January 1948).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Nioro du SahelKayes
- coords
- 15.23°, -9.59°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
28.8°C
Average daily high
35.6°C
Average daily low
22.4°C
Annual rainfall
377mm
Sunshine / day
11.0h
Mean relative humidity
37%
Average peak wind
16.2km/h
Seasonal range
11.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
328 d/yr
Rainy days (≥ 1 mm)
53 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.9 °C
Average feels-like low
21.5 °C
Average peak gust
33.8 km/h
Tropical nights (≥ 20 °C)
258 d/yr
Solar radiation
22.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.66 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
46.2 °C
21 May 1987
Coldest day
6.2 °C
17 January 1948
Wettest day
153 mm
26 August 2020
Windiest day
37.1 km/h
17 July 1988
Strongest gust
68.8 km/h
3 July 2024
Hottest feels-like
48.0 °C
9 May 2020
Coldest feels-like
2.0 °C
17 January 1948
Sunniest day
12.8 h
5 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 31.9 °C | +1.1 °C | 0 mm | -0 mm |
| Feb | 33.9 °C | 0.0 °C | 0 mm | -0 mm |
| Mar | 40.5 °C | +3.3 °C | 0 mm | -0 mm |
| Apr | 42.5 °C | +2.5 °C | 0 mm | -1 mm |
| May | 42.5 °C | +1.5 °C | 4 mm | -2 mm |
| Jun | 39.7 °C | +0.3 °C | 8 mm | -16 mm |
| Jul | 34.0 °C | -0.9 °C | 60 mm | -19 mm |
| Aug | 32.0 °C | -0.2 °C | 154 mm | +4 mm |
| Sep | 33.5 °C | -0.1 °C | 65 mm | -27 mm |
| Oct | 38.7 °C | +1.8 °C | 13 mm | -10 mm |
| Nov | 37.1 °C | +1.7 °C | 0 mm | -2 mm |
| Dec | 30.3 °C | -1.0 °C | 0 mm | -1 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Nioro du Sahel?
Nioro du Sahel has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 28.8 °C and it receives 377 mm of precipitation per year.
What is the hottest day ever recorded in Nioro du Sahel?
The hottest day measured in Nioro du Sahel between 1940 and 2025 was 21 May 1987, reaching 46.2 °C.
What is the coldest day in Nioro du Sahel?
The coldest day measured in Nioro du Sahel between 1940 and 2025 was 17 January 1948, at 6.2 °C.
Does it snow in Nioro du Sahel?
Almost never: Nioro du Sahel sees virtually no snow, with about 0 frost days per year.
Has the climate of Nioro du Sahel warmed?
Yes: Nioro du Sahel warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nioro du Sahel?
The wettest day measured in Nioro du Sahel between 1940 and 2025 was 26 August 2020, with 153 mm of rain in 24 hours.
What was the windiest day in Nioro du Sahel?
The windiest day measured in Nioro du Sahel between 1940 and 2025 was 17 July 1988, with winds reaching 37.1 km/h.
What is the warmest month in Nioro du Sahel?
The warmest month in Nioro du Sahel is May (34.4 °C on average); the coldest is January (22.9 °C).
How much does it rain in Nioro du Sahel?
Nioro du Sahel receives on average 377 mm of precipitation per year, spread over about 53 rainy days.
Is it sunny in Nioro du Sahel?
Nioro du Sahel gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in Nioro du Sahel?
Yes: Nioro du Sahel has on average 258 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nioro du Sahel?
In Nioro du Sahel, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 9 May 2020, and the lowest was 2.0 °C on 17 January 1948.
Compare Nioro du Sahel with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nioro du Sahel