Climate averages 1991–2020
Ziway weather
in September.
A warm, wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Ziway: daytime highs average 22.7°C and nights cool to about 15.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 114 mm of rain on roughly 19 days, which makes September a 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 Mek’ī (26 km away). In September its highs average 24.4°C, 1.7°C warmer than Ziway, with 111 mm of rain.
Among the 40 cities listed in Ethiopia, Ziway ranks 22nd of 40 for the warmest September highs and 18th of 40 for the driest September (rainfall, lowest first). The mean September high of those 40 cities is 23.6°C; Ziway is 0.9°C cooler than that mean.
From September to October, average highs rise by 1.7°C to 24.4°C, and monthly rainfall falls from 114 mm to 50 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
Ziway climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.5°C14.8°C | 14.8°C | 3.3 | 0.9 | 11.712 h |
| February | 26.8°C15.8°C | 15.8°C | 6.4 | 1.4 | 11.912 h |
| March | 27.2°C16.9°C | 16.9°C | 28 | 5.3 | 12.112 h |
| April | 26.7°C17.3°C | 17.3°C | 56 | 9.8 | 12.312 h |
| May | 25.7°C16.9°C | 16.9°C | 70 | 10.9 | 12.512 h |
| June | 24.2°C16.5°C | 16.5°C | 27 | 6.2 | 12.613 h |
| July | 22.4°C15.9°C | 15.9°C | 67 | 15.8 | 12.513 h |
| August | 22.0°C15.7°C | 15.7°C | 107 | 20.7 | 12.412 h |
| September, selected | 22.7°C15.6°C | 15.6°C | 114 | 19.3 | 12.212 h |
| October | 24.4°C15.7°C | 15.7°C | 50 | 6.2 | 12.012 h |
| November | 24.9°C15.2°C | 15.2°C | 7.3 | 1.3 | 11.812 h |
| December | 24.8°C14.5°C | 14.5°C | 1.2 | 0.3 | 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
- Mek’ī in SeptemberEthiopia · 26 kmHigh 24.4°C · Low 15.6°C · 111 mm rain
- Butajīra in SeptemberEthiopia · 44 kmHigh 21.7°C · Low 12.9°C · 408 mm rain
- Arsi Negele in SeptemberEthiopia · 65 kmHigh 21.0°C · Low 13.2°C · 369 mm rain
- Shashamane in SeptemberEthiopia · 83 kmHigh 21.4°C · Low 13.0°C · 136 mm rain
- Nazrēt in SeptemberEthiopia · 91 kmHigh 26.7°C · Low 15.2°C · 62 mm rain
- Bishoftu in SeptemberEthiopia · 96 kmHigh 22.1°C · Low 12.1°C · 126 mm rain
- K’olīto in SeptemberEthiopia · 98 kmHigh 22.9°C · Low 13.6°C · 163 mm rain
- Awasa in SeptemberEthiopia · 100 kmHigh 23.1°C · Low 14.2°C · 171 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 Ziway) is explained once on the Ziway year overview and on the Sources, method and limits page.