Climate averages 1991–2020
Addis Ababa weather
in September.
A mild, very wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Addis Ababa: daytime highs average 20.0°C and nights cool to about 10.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 275 mm of rain on roughly 25 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average September day.
The nearest other city in this atlas is Sebeta (19 km away). In September its highs average 20.3°C, about as warm as Addis Ababa, with 303 mm of rain.
Among the 40 cities listed in Ethiopia, Addis Ababa ranks joint 36th of 40 for the warmest September highs and 32nd of 40 for the driest September (rainfall, lowest first). The mean September high of those 40 cities is 23.6°C; Addis Ababa is 3.6°C cooler than that mean.
From September to October, average highs rise by 0.7°C to 20.8°C, and monthly rainfall falls from 275 mm to 48 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
Addis Ababa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.3°C9.1°C | 9.1°C | 15 | 3.3 | 11.712 h |
| February | 23.5°C10.1°C | 10.1°C | 19 | 4.2 | 11.812 h |
| March | 23.7°C11.3°C | 11.3°C | 65 | 9.9 | 12.112 h |
| April | 23.3°C11.7°C | 11.7°C | 142 | 13.6 | 12.312 h |
| May | 22.9°C11.5°C | 11.5°C | 177 | 13.6 | 12.513 h |
| June | 21.3°C11.0°C | 11.0°C | 267 | 23.5 | 12.613 h |
| July | 19.8°C11.2°C | 11.2°C | 377 | 30.9 | 12.613 h |
| August | 19.8°C11.2°C | 11.2°C | 407 | 31.0 | 12.412 h |
| September, selected | 20.0°C10.3°C | 10.3°C | 275 | 24.9 | 12.212 h |
| October | 20.8°C8.8°C | 8.8°C | 48 | 6.9 | 11.912 h |
| November | 21.6°C8.6°C | 8.6°C | 9.5 | 1.8 | 11.712 h |
| December | 21.7°C8.4°C | 8.4°C | 5.8 | 1.2 | 11.612 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
- Sebeta in SeptemberEthiopia · 19 kmHigh 20.3°C · Low 10.2°C · 303 mm rain
- Bishoftu in SeptemberEthiopia · 40 kmHigh 22.1°C · Low 12.1°C · 126 mm rain
- Nazrēt in SeptemberEthiopia · 78 kmHigh 26.7°C · Low 15.2°C · 62 mm rain
- Mek’ī in SeptemberEthiopia · 98 kmHigh 24.4°C · Low 15.6°C · 111 mm rain
- Hāgere Hiywet in SeptemberEthiopia · 99 kmHigh 21.9°C · Low 13.3°C · 434 mm rain
- Waliso in SeptemberEthiopia · 102 kmHigh 20.3°C · Low 11.3°C · 286 mm rain
- Butajīra in SeptemberEthiopia · 109 kmHigh 21.7°C · Low 12.9°C · 408 mm rain
- Debre Birhan in SeptemberEthiopia · 113 kmHigh 18.0°C · Low 9.7°C · 252 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 Addis Ababa) is explained once on the Addis Ababa year overview and on the Sources, method and limits page.