Grand-Bassam climate — normals and trends
Grand-Bassam (Ivory Coast) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 1,422 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 April (27.1 °C on average) and the coldest is August (23.8 °C). Rainfall peaks in June.
Grand-Bassam averages 0 frost days, 0 hot days (≥ 30 °C) and 269 rainy days per year.
Grand-Bassam has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.2 °C (on 7 January 2016) and the coldest 21.0 °C (on 6 September 1943).
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
Grand-BassamComoé District
- coords
- 5.21°, -3.74°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
26.8°C
Average daily low
24.9°C
Annual rainfall
1,422mm
Sunshine / day
10.1h
Mean relative humidity
85%
Average peak wind
17.9km/h
Seasonal range
3.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
269 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.3 °C
Average feels-like low
28.5 °C
Average peak gust
27.7 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
17.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °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
31.2 °C
7 January 2016
Coldest day
21.0 °C
6 September 1943
Wettest day
220 mm
9 May 2014
Windiest day
37.2 km/h
10 June 1955
Strongest gust
52.6 km/h
10 June 1955
Hottest feels-like
37.9 °C
27 March 2024
Coldest feels-like
20.4 °C
8 January 1957
Sunniest day
12.0 h
5 July 1978
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 | 28.6 °C | +1.1 °C | 51 mm | -5 mm |
| Feb | 28.2 °C | +0.4 °C | 44 mm | -20 mm |
| Mar | 28.3 °C | +0.2 °C | 40 mm | -57 mm |
| Apr | 28.7 °C | +0.5 °C | 95 mm | -28 mm |
| May | 28.2 °C | +0.6 °C | 238 mm | +27 mm |
| Jun | 26.8 °C | +0.5 °C | 383 mm | +120 mm |
| Jul | 25.4 °C | +0.2 °C | 54 mm | -95 mm |
| Aug | 24.2 °C | -0.3 °C | 43 mm | -30 mm |
| Sep | 25.4 °C | +0.5 °C | 60 mm | -31 mm |
| Oct | 26.6 °C | +0.5 °C | 148 mm | +37 mm |
| Nov | 27.7 °C | +0.5 °C | 89 mm | -16 mm |
| Dec | 28.0 °C | +0.4 °C | 114 mm | +37 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 Grand-Bassam?
Grand-Bassam has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 1,422 mm of precipitation per year.
What is the hottest day ever recorded in Grand-Bassam?
The hottest day measured in Grand-Bassam between 1940 and 2025 was 7 January 2016, reaching 31.2 °C.
What is the coldest day in Grand-Bassam?
The coldest day measured in Grand-Bassam between 1940 and 2025 was 6 September 1943, at 21.0 °C.
Does it snow in Grand-Bassam?
Almost never: Grand-Bassam sees virtually no snow, with about 0 frost days per year.
Has the climate of Grand-Bassam warmed?
Yes: Grand-Bassam warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grand-Bassam?
The wettest day measured in Grand-Bassam between 1940 and 2025 was 9 May 2014, with 220 mm of rain in 24 hours.
What was the windiest day in Grand-Bassam?
The windiest day measured in Grand-Bassam between 1940 and 2025 was 10 June 1955, with winds reaching 37.2 km/h.
What is the warmest month in Grand-Bassam?
The warmest month in Grand-Bassam is April (27.1 °C on average); the coldest is August (23.8 °C).
How much does it rain in Grand-Bassam?
Grand-Bassam receives on average 1,422 mm of precipitation per year, spread over about 269 rainy days.
Is it sunny in Grand-Bassam?
Grand-Bassam gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Grand-Bassam?
Yes: Grand-Bassam has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Grand-Bassam?
In Grand-Bassam, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 27 March 2024, and the lowest was 20.4 °C on 8 January 1957.
Compare Grand-Bassam with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grand-Bassam