Diéma climate — normals and trends
Diéma (Mali) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 28.3 °C and it receives 552 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 (33.7 °C on average) and the coldest is January (23.5 °C). Rainfall peaks in August.
Diéma averages 0 frost days, 322 hot days (≥ 30 °C) and 72 rainy days per year.
Diéma has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The hottest day of the period reached 45.4 °C (on 27 April 1973) and the coldest 8.4 °C (on 2 February 1940).
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
DiémaKayes
- coords
- 14.54°, -9.19°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
28.3°C
Average daily high
34.9°C
Average daily low
22.2°C
Annual rainfall
552mm
Sunshine / day
10.9h
Mean relative humidity
41%
Average peak wind
14.9km/h
Seasonal range
10.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
322 d/yr
Rainy days (≥ 1 mm)
72 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.9 °C
Average feels-like low
21.7 °C
Average peak gust
32.9 km/h
Tropical nights (≥ 20 °C)
262 d/yr
Solar radiation
22.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.65 · 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
45.4 °C
27 April 1973
Coldest day
8.4 °C
2 February 1940
Wettest day
186 mm
1 September 2020
Windiest day
33.6 km/h
9 April 2012
Strongest gust
64.1 km/h
23 August 2006
Hottest feels-like
47.8 °C
3 June 2021
Coldest feels-like
3.4 °C
2 February 1940
Sunniest day
12.8 h
6 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 | 32.5 °C | +1.3 °C | 0 mm | -0 mm |
| Feb | 34.4 °C | +0.2 °C | 0 mm | 0 mm |
| Mar | 40.5 °C | +3.1 °C | 0 mm | -1 mm |
| Apr | 42.1 °C | +2.3 °C | 1 mm | -1 mm |
| May | 41.6 °C | +1.3 °C | 8 mm | -3 mm |
| Jun | 38.3 °C | +0.4 °C | 20 mm | -25 mm |
| Jul | 32.5 °C | -0.5 °C | 123 mm | -4 mm |
| Aug | 30.9 °C | +0.1 °C | 209 mm | +8 mm |
| Sep | 32.5 °C | +0.6 °C | 119 mm | -10 mm |
| Oct | 37.6 °C | +2.4 °C | 7 mm | -27 mm |
| Nov | 36.8 °C | +1.7 °C | 0 mm | -2 mm |
| Dec | 30.8 °C | -0.7 °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 Diéma?
Diéma has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 28.3 °C and it receives 552 mm of precipitation per year.
What is the hottest day ever recorded in Diéma?
The hottest day measured in Diéma between 1940 and 2025 was 27 April 1973, reaching 45.4 °C.
What is the coldest day in Diéma?
The coldest day measured in Diéma between 1940 and 2025 was 2 February 1940, at 8.4 °C.
Does it snow in Diéma?
Almost never: Diéma sees virtually no snow, with about 0 frost days per year.
Has the climate of Diéma warmed?
Yes: Diéma warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Diéma?
The wettest day measured in Diéma between 1940 and 2025 was 1 September 2020, with 186 mm of rain in 24 hours.
What was the windiest day in Diéma?
The windiest day measured in Diéma between 1940 and 2025 was 9 April 2012, with winds reaching 33.6 km/h.
What is the warmest month in Diéma?
The warmest month in Diéma is May (33.7 °C on average); the coldest is January (23.5 °C).
How much does it rain in Diéma?
Diéma receives on average 552 mm of precipitation per year, spread over about 72 rainy days.
Is it sunny in Diéma?
Diéma gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Diéma?
Yes: Diéma has on average 262 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Diéma?
In Diéma, between 1940 and 2025, the highest apparent temperature reached 47.8 °C on 3 June 2021, and the lowest was 3.4 °C on 2 February 1940.
Compare Diéma with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Diéma