Climate averages 1991–2020
Jimma weather
in September.
A warm, very wet month: the 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Jimma: daytime highs average 23.2°C and nights cool to about 13.6°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 248 mm of rain on roughly 29 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average September day.
The nearest other city in this atlas is Hosa’ina (113 km away). In September its highs average 19.4°C, 3.8°C cooler than Jimma, with 355 mm of rain.
Among the 40 cities listed in Ethiopia, Jimma ranks 18th of 40 for the warmest September highs and joint 26th of 40 for the driest September (rainfall, lowest first). The mean September high of those 40 cities is 23.6°C; Jimma is 0.4°C cooler than that mean.
From September to October, average highs rise by 0.7°C to 23.9°C, and monthly rainfall falls from 248 mm to 148 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
Jimma climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.0°C13.6°C | 13.6°C | 24 | 4.9 | 11.712 h |
| February | 27.3°C14.4°C | 14.4°C | 29 | 4.9 | 11.912 h |
| March | 27.1°C14.8°C | 14.8°C | 75 | 11.9 | 12.112 h |
| April | 25.9°C15.0°C | 15.0°C | 142 | 19.2 | 12.312 h |
| May | 24.3°C14.6°C | 14.6°C | 225 | 25.8 | 12.512 h |
| June | 23.1°C14.0°C | 14.0°C | 179 | 28.3 | 12.613 h |
| July | 22.3°C13.8°C | 13.8°C | 191 | 29.4 | 12.513 h |
| August | 22.5°C13.9°C | 13.9°C | 205 | 29.6 | 12.412 h |
| September, selected | 23.2°C13.6°C | 13.6°C | 248 | 29.3 | 12.212 h |
| October | 23.9°C13.2°C | 13.2°C | 148 | 17.9 | 12.012 h |
| November | 24.6°C12.8°C | 12.8°C | 50 | 7.4 | 11.812 h |
| December | 25.2°C12.8°C | 12.8°C | 19 | 3.8 | 11.712 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
- Hosa’ina in SeptemberEthiopia · 113 kmHigh 19.4°C · Low 10.6°C · 355 mm rain
- Āreka in SeptemberEthiopia · 117 kmHigh 23.0°C · Low 13.9°C · 267 mm rain
- Gununo in SeptemberEthiopia · 123 kmHigh 21.9°C · Low 13.1°C · 267 mm rain
- Welk’īt’ē in SeptemberEthiopia · 125 kmHigh 20.4°C · Low 11.6°C · 294 mm rain
- Sodo in SeptemberEthiopia · 137 kmHigh 21.5°C · Low 12.7°C · 227 mm rain
- K’olīto in SeptemberEthiopia · 143 kmHigh 22.9°C · Low 13.6°C · 163 mm rain
- Waliso in SeptemberEthiopia · 157 kmHigh 20.3°C · Low 11.3°C · 286 mm rain
- Butajīra in SeptemberEthiopia · 176 kmHigh 21.7°C · Low 12.9°C · 408 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 Jimma) is explained once on the Jimma year overview and on the Sources, method and limits page.