Climate averages 1991–2020
Owerri weather
in September.
A hot, very 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 hot month in Owerri: daytime highs average 28.7°C and nights cool to about 22.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 315 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 09 min on an average September day.
The nearest other city in this atlas is Ihiala (46 km away). In September its highs average 28.1°C, 0.6°C cooler than Owerri, with 282 mm of rain.
Among the 143 cities listed in Nigeria, Owerri ranks joint 45th of 143 for the warmest September highs and 127th of 143 for the driest September (rainfall, lowest first). The mean September high of those 143 cities is 28.6°C; Owerri is level with that mean.
From September to October, average highs rise by 0.7°C to 29.3°C, and monthly rainfall falls from 315 mm to 302 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
Owerri climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 34.4°C22.9°C | 22.9°C | 25 | 5.6 | 11.812 h |
| February | 34.4°C23.7°C | 23.7°C | 53 | 10.0 | 11.912 h |
| March | 32.9°C23.9°C | 23.9°C | 134 | 20.5 | 12.112 h |
| April | 31.5°C23.6°C | 23.6°C | 213 | 24.8 | 12.212 h |
| May | 30.4°C23.3°C | 23.3°C | 264 | 28.3 | 12.412 h |
| June | 28.8°C22.5°C | 22.5°C | 296 | 28.4 | 12.412 h |
| July | 28.1°C22.0°C | 22.0°C | 301 | 28.9 | 12.412 h |
| August | 28.3°C22.1°C | 22.1°C | 272 | 27.0 | 12.312 h |
| September, selected | 28.7°C22.2°C | 22.2°C | 315 | 29.2 | 12.212 h |
| October | 29.3°C22.4°C | 22.4°C | 302 | 29.7 | 12.012 h |
| November | 30.8°C22.7°C | 22.7°C | 115 | 18.1 | 11.912 h |
| December | 33.0°C22.9°C | 22.9°C | 23 | 5.7 | 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
- Ihiala in SeptemberNigeria · 46 kmHigh 28.1°C · Low 22.2°C · 282 mm rain
- Umuahia in SeptemberNigeria · 51 kmHigh 28.0°C · Low 21.9°C · 291 mm rain
- Okigwe in SeptemberNigeria · 52 kmHigh 28.5°C · Low 22.1°C · 286 mm rain
- Aba in SeptemberNigeria · 56 kmHigh 27.9°C · Low 22.2°C · 345 mm rain
- Igbo-Ukwu in SeptemberNigeria · 59 kmHigh 27.1°C · Low 21.1°C · 279 mm rain
- Nnewi in SeptemberNigeria · 61 kmHigh 28.2°C · Low 22.3°C · 279 mm rain
- Atani in SeptemberNigeria · 67 kmHigh 28.8°C · Low 22.9°C · 212 mm rain
- Bende in SeptemberNigeria · 67 kmHigh 28.3°C · Low 22.1°C · 291 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 Owerri) is explained once on the Owerri year overview and on the Sources, method and limits page.