Illéla climate — normals and trends
Illéla (Niger) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 28.7 °C and it receives 262 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 (33.4 °C on average) and the coldest is January (23.1 °C). Rainfall peaks in August.
Illéla averages 0 frost days, 330 hot days (≥ 30 °C) and 46 rainy days per year.
Illéla has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The hottest day of the period reached 45.8 °C (on 19 April 2010) and the coldest 7.6 °C (on 11 January 1957).
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
IllélaTahoua Region
- coords
- 14.46°, 5.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
28.7°C
Average daily high
35.5°C
Average daily low
22.3°C
Annual rainfall
262mm
Sunshine / day
11.2h
Mean relative humidity
35%
Average peak wind
19.4km/h
Seasonal range
10.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
330 d/yr
Rainy days (≥ 1 mm)
46 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.2 °C
Average feels-like low
20.9 °C
Average peak gust
36.4 km/h
Tropical nights (≥ 20 °C)
260 d/yr
Solar radiation
23.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.72 · 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
45.8 °C
19 April 2010
Coldest day
7.6 °C
11 January 1957
Wettest day
173 mm
3 August 2024
Windiest day
39.0 km/h
16 February 1985
Strongest gust
65.2 km/h
16 February 1985
Hottest feels-like
46.9 °C
27 May 1998
Coldest feels-like
1.9 °C
11 January 1957
Sunniest day
12.8 h
30 May 1942
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 32.6 °C | +1.6 °C | 0 mm | 0 mm |
| Feb | 34.9 °C | +1.0 °C | 0 mm | 0 mm |
| Mar | 40.8 °C | +3.1 °C | 0 mm | -0 mm |
| Apr | 41.6 °C | +1.4 °C | 0 mm | -2 mm |
| May | 41.2 °C | +1.3 °C | 10 mm | -1 mm |
| Jun | 38.3 °C | +0.6 °C | 6 mm | -18 mm |
| Jul | 34.0 °C | -0.3 °C | 39 mm | -30 mm |
| Aug | 32.4 °C | +0.1 °C | 42 mm | -71 mm |
| Sep | 34.2 °C | -0.4 °C | 38 mm | 0 mm |
| Oct | 37.7 °C | +0.7 °C | 2 mm | -4 mm |
| Nov | 36.6 °C | +1.5 °C | 0 mm | 0 mm |
| Dec | 34.6 °C | +2.9 °C | 0 mm | 0 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 Illéla?
Illéla has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 28.7 °C and it receives 262 mm of precipitation per year.
What is the hottest day ever recorded in Illéla?
The hottest day measured in Illéla between 1940 and 2025 was 19 April 2010, reaching 45.8 °C.
What is the coldest day in Illéla?
The coldest day measured in Illéla between 1940 and 2025 was 11 January 1957, at 7.6 °C.
Does it snow in Illéla?
Almost never: Illéla sees virtually no snow, with about 0 frost days per year.
Has the climate of Illéla warmed?
Yes: Illéla warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Illéla?
The wettest day measured in Illéla between 1940 and 2025 was 3 August 2024, with 173 mm of rain in 24 hours.
What was the windiest day in Illéla?
The windiest day measured in Illéla between 1940 and 2025 was 16 February 1985, with winds reaching 39.0 km/h.
What is the warmest month in Illéla?
The warmest month in Illéla is May (33.4 °C on average); the coldest is January (23.1 °C).
How much does it rain in Illéla?
Illéla receives on average 262 mm of precipitation per year, spread over about 46 rainy days.
Is it sunny in Illéla?
Illéla gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Illéla?
Yes: Illéla has on average 260 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Illéla?
In Illéla, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 27 May 1998, and the lowest was 1.9 °C on 11 January 1957.
Compare Illéla with another city
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Nearby cities
The climate around Illéla