Climate averages 1991–2020
Ashaiman weather
by month.
See how the year changes. March has the highest average daily maximum; January has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Ashaiman averages a daytime high of 29.8°C and a nighttime low of 24.7°C, with about 611 mm of rain on roughly 124 days. March is the warmest month (average high 32.0°C) and August (tied with July) the coolest (27.0°C). June is the wettest month with 137 mm; January is the driest with 15 mm.
The annual picture
A year in Ashaiman
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ashaiman climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.5°C24.9°C | 24.9°C | 15 | 4.2 | 11.812 h |
| February | 31.9°C25.7°C | 25.7°C | 20 | 5.2 | 11.912 h |
| March | 32.0°C26.0°C | 26.0°C | 34 | 8.2 | 12.112 h |
| April | 31.6°C25.9°C | 25.9°C | 46 | 10.8 | 12.212 h |
| May | 30.2°C25.3°C | 25.3°C | 92 | 16.5 | 12.412 h |
| June | 28.0°C24.2°C | 24.2°C | 137 | 18.8 | 12.412 h |
| July | 27.0°C23.4°C | 23.4°C | 60 | 10.4 | 12.412 h |
| August | 27.0°C22.9°C | 22.9°C | 35 | 8.5 | 12.312 h |
| September | 27.8°C23.5°C | 23.5°C | 57 | 12.3 | 12.212 h |
| October | 29.0°C24.1°C | 24.1°C | 62 | 13.2 | 12.012 h |
| November | 30.2°C24.9°C | 24.9°C | 34 | 9.9 | 11.912 h |
| December | 31.1°C25.1°C | 25.1°C | 20 | 5.6 | 11.812 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- Medina EstatesGhana · 15 kmHigh 29.6°C · Low 24.0°C · 883 mm rain a year
- AccraGhana · 24 kmHigh 29.0°C · Low 24.5°C · 631 mm rain a year
- AtsiamanGhana · 32 kmHigh 30.0°C · Low 24.0°C · 883 mm rain a year
- GbaweGhana · 33 kmHigh 29.2°C · Low 24.3°C · 631 mm rain a year
- AmanfromGhana · 44 kmHigh 28.7°C · Low 24.2°C · 809 mm rain a year
- KoforiduaGhana · 50 kmHigh 30.3°C · Low 22.8°C · 1,357 mm rain a year
- WinnebaGhana · 76 kmHigh 29.2°C · Low 24.4°C · 744 mm rain a year
- HoGhana · 115 kmHigh 30.7°C · Low 23.0°C · 1,411 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC±0, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 5.70°, 0.00° (4 km from the city centre), adjusted down by 0.1°C for the difference between the city's elevation (23 m) and the cell's (2 m). Rain comes from the 0.25° cell at 5.75°, 0.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.