Achiaman climate — normals and trends
Achiaman (Ghana) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.3 °C and it receives 953 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 March (27.8 °C on average) and the coldest is August (24.4 °C). Rainfall peaks in June.
Achiaman averages 0 frost days, 202 hot days (≥ 30 °C) and 208 rainy days per year.
Achiaman has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.1 °C (on 18 March 1998) and the coldest 17.6 °C (on 3 January 1989).
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
AchiamanGreater Accra
- coords
- 5.70°, -0.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.3°C
Average daily high
30.2°C
Average daily low
23.7°C
Annual rainfall
953mm
Sunshine / day
10.3h
Mean relative humidity
81%
Average peak wind
13.5km/h
Seasonal range
3.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
202 d/yr
Rainy days (≥ 1 mm)
208 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.2 °C
Average feels-like low
27.6 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
18.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.85 · 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
36.1 °C
18 March 1998
Coldest day
17.6 °C
3 January 1989
Wettest day
150 mm
6 July 2017
Windiest day
24.7 km/h
16 August 1974
Strongest gust
50.8 km/h
18 June 2018
Hottest feels-like
43.0 °C
10 April 2024
Coldest feels-like
17.5 °C
9 January 1957
Sunniest day
12.0 h
2 April 1940
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 | 33.1 °C | +1.4 °C | 21 mm | -11 mm |
| Feb | 33.2 °C | +0.8 °C | 40 mm | -6 mm |
| Mar | 33.2 °C | +1.0 °C | 53 mm | -20 mm |
| Apr | 32.5 °C | +0.7 °C | 60 mm | -23 mm |
| May | 31.9 °C | +1.3 °C | 89 mm | -34 mm |
| Jun | 30.3 °C | +1.7 °C | 107 mm | -37 mm |
| Jul | 27.9 °C | +0.3 °C | 33 mm | -54 mm |
| Aug | 27.0 °C | -0.5 °C | 46 mm | -11 mm |
| Sep | 29.0 °C | +0.6 °C | 110 mm | +16 mm |
| Oct | 30.1 °C | +0.5 °C | 139 mm | +36 mm |
| Nov | 31.2 °C | +0.6 °C | 49 mm | -21 mm |
| Dec | 31.6 °C | +0.5 °C | 51 mm | +8 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 Achiaman?
Achiaman has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.3 °C and it receives 953 mm of precipitation per year.
What is the hottest day ever recorded in Achiaman?
The hottest day measured in Achiaman between 1940 and 2025 was 18 March 1998, reaching 36.1 °C.
What is the coldest day in Achiaman?
The coldest day measured in Achiaman between 1940 and 2025 was 3 January 1989, at 17.6 °C.
Does it snow in Achiaman?
Almost never: Achiaman sees virtually no snow, with about 0 frost days per year.
Has the climate of Achiaman warmed?
Yes: Achiaman warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Achiaman?
The wettest day measured in Achiaman between 1940 and 2025 was 6 July 2017, with 150 mm of rain in 24 hours.
What was the windiest day in Achiaman?
The windiest day measured in Achiaman between 1940 and 2025 was 16 August 1974, with winds reaching 24.7 km/h.
What is the warmest month in Achiaman?
The warmest month in Achiaman is March (27.8 °C on average); the coldest is August (24.4 °C).
How much does it rain in Achiaman?
Achiaman receives on average 953 mm of precipitation per year, spread over about 208 rainy days.
Is it sunny in Achiaman?
Achiaman gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Achiaman?
Yes: Achiaman has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Achiaman?
In Achiaman, between 1940 and 2025, the highest apparent temperature reached 43.0 °C on 10 April 2024, and the lowest was 17.5 °C on 9 January 1957.
Compare Achiaman with another city
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Nearby cities
The climate around Achiaman