Climate averages 1991–2020
Atsiaman weather
in September.
A hot, wet month: the 10th warmest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Atsiaman: daytime highs average 28.1°C and nights cool to about 23.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 103 mm of rain on roughly 21 days, which makes September a wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average September day.
The nearest other city in this atlas is Gbawe (14 km away). In September its highs average 27.3°C, 0.8°C cooler than Atsiaman, with 39 mm of rain.
Among the 26 cities listed in Ghana, Atsiaman ranks joint 16th of 26 for the warmest September highs and joint 7th of 26 for the driest September (rainfall, lowest first). The mean September high of those 26 cities is 28.2°C; Atsiaman is 0.1°C cooler than that mean.
From September to October, average highs rise by 0.9°C to 29.0°C, and monthly rainfall stays at 103 mm.
The annual picture
September in context
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
Atsiaman climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.0°C24.0°C | 24.0°C | 27 | 7.2 | 11.812 h |
| February | 32.4°C25.0°C | 25.0°C | 37 | 9.4 | 11.912 h |
| March | 32.1°C25.3°C | 25.3°C | 57 | 13.1 | 12.112 h |
| April | 31.7°C25.3°C | 25.3°C | 65 | 13.4 | 12.212 h |
| May | 30.3°C24.7°C | 24.7°C | 108 | 19.8 | 12.412 h |
| June | 28.2°C23.7°C | 23.7°C | 152 | 22.2 | 12.412 h |
| July | 27.3°C23.0°C | 23.0°C | 85 | 17.6 | 12.412 h |
| August | 27.3°C22.7°C | 22.7°C | 58 | 15.5 | 12.312 h |
| September, selected | 28.1°C23.1°C | 23.1°C | 103 | 21.1 | 12.212 h |
| October | 29.0°C23.6°C | 23.6°C | 103 | 20.7 | 12.012 h |
| November | 30.1°C24.0°C | 24.0°C | 55 | 15.3 | 11.912 h |
| December | 31.1°C24.2°C | 24.2°C | 32 | 8.6 | 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
September in nearby cities
- Gbawe in SeptemberGhana · 14 kmHigh 27.3°C · Low 23.2°C · 39 mm rain
- Medina Estates in SeptemberGhana · 19 kmHigh 27.7°C · Low 23.0°C · 103 mm rain
- Amanfrom in SeptemberGhana · 20 kmHigh 26.8°C · Low 23.0°C · 83 mm rain
- Accra in SeptemberGhana · 21 kmHigh 27.1°C · Low 23.3°C · 39 mm rain
- Ashaiman in SeptemberGhana · 32 kmHigh 27.8°C · Low 23.5°C · 57 mm rain
- Koforidua in SeptemberGhana · 45 kmHigh 28.4°C · Low 22.2°C · 167 mm rain
- Winneba in SeptemberGhana · 51 kmHigh 27.4°C · Low 23.3°C · 37 mm rain
- Cape Coast in SeptemberGhana · 121 kmHigh 27.4°C · Low 23.3°C · 52 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Atsiaman) is explained once on the Atsiaman year overview and on the Sources, method and limits page.
Medina Estates lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.