I-n-Tillit climate — normals and trends
I-n-Tillit (Mali) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 29.7 °C and it receives 209 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 (35.0 °C on average) and the coldest is January (23.1 °C). Rainfall peaks in August.
I-n-Tillit averages 0 frost days, 330 hot days (≥ 30 °C) and 39 rainy days per year.
I-n-Tillit has warmed by +2.9 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.0 °C (on 24 May 2013) and the coldest 8.3 °C (on 1 January 1947).
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
I-n-TillitGao
- coords
- 15.55°, -0.46°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
29.7°C
Average daily high
36.0°C
Average daily low
23.2°C
Annual rainfall
209mm
Sunshine / day
11.3h
Mean relative humidity
31%
Average peak wind
22.2km/h
Seasonal range
11.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
330 d/yr
Rainy days (≥ 1 mm)
39 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.1 °C
Average feels-like low
21.3 °C
Average peak gust
37.3 km/h
Tropical nights (≥ 20 °C)
270 d/yr
Solar radiation
23.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.4 °C per decade · r² = 0.74 · 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
46.0 °C
24 May 2013
Coldest day
8.3 °C
1 January 1947
Wettest day
95 mm
6 August 1950
Windiest day
48.1 km/h
30 August 2023
Strongest gust
73.8 km/h
12 May 1979
Hottest feels-like
46.8 °C
19 May 2010
Coldest feels-like
2.4 °C
1 January 1947
Sunniest day
12.2 h
10 July 1940
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 | 31.4 °C | +1.4 °C | 0 mm | -0 mm |
| Feb | 34.7 °C | +1.6 °C | 0 mm | -0 mm |
| Mar | 41.1 °C | +4.3 °C | 0 mm | -0 mm |
| Apr | 42.3 °C | +2.4 °C | 0 mm | -1 mm |
| May | 42.6 °C | +1.7 °C | 2 mm | -2 mm |
| Jun | 40.6 °C | +1.0 °C | 6 mm | -9 mm |
| Jul | 35.6 °C | -0.7 °C | 64 mm | +6 mm |
| Aug | 35.5 °C | +1.4 °C | 29 mm | -66 mm |
| Sep | 37.0 °C | +0.5 °C | 14 mm | -19 mm |
| Oct | 39.3 °C | +1.3 °C | 1 mm | -3 mm |
| Nov | 36.9 °C | +1.7 °C | 0 mm | 0 mm |
| Dec | 32.2 °C | +1.2 °C | 1 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 I-n-Tillit?
I-n-Tillit has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 29.7 °C and it receives 209 mm of precipitation per year.
What is the hottest day ever recorded in I-n-Tillit?
The hottest day measured in I-n-Tillit between 1940 and 2025 was 24 May 2013, reaching 46.0 °C.
What is the coldest day in I-n-Tillit?
The coldest day measured in I-n-Tillit between 1940 and 2025 was 1 January 1947, at 8.3 °C.
Does it snow in I-n-Tillit?
Almost never: I-n-Tillit sees virtually no snow, with about 0 frost days per year.
Has the climate of I-n-Tillit warmed?
Yes: I-n-Tillit warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in I-n-Tillit?
The wettest day measured in I-n-Tillit between 1940 and 2025 was 6 August 1950, with 95 mm of rain in 24 hours.
What was the windiest day in I-n-Tillit?
The windiest day measured in I-n-Tillit between 1940 and 2025 was 30 August 2023, with winds reaching 48.1 km/h.
What is the warmest month in I-n-Tillit?
The warmest month in I-n-Tillit is May (35.0 °C on average); the coldest is January (23.1 °C).
How much does it rain in I-n-Tillit?
I-n-Tillit receives on average 209 mm of precipitation per year, spread over about 39 rainy days.
Is it sunny in I-n-Tillit?
I-n-Tillit gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in I-n-Tillit?
Yes: I-n-Tillit has on average 270 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in I-n-Tillit?
In I-n-Tillit, between 1940 and 2025, the highest apparent temperature reached 46.8 °C on 19 May 2010, and the lowest was 2.4 °C on 1 January 1947.
Compare I-n-Tillit with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around I-n-Tillit