Climate averages 1991–2020
Onitsha weather
in August.
A hot, wet month: the 11th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Onitsha: daytime highs average 28.3°C and nights cool to about 22.7°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 177 mm of rain on roughly 23 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average August day.
The nearest other city in this atlas is Nkpor (5 km away). In August its highs average 28.0°C, about as warm as Onitsha, with 177 mm of rain.
Among the 143 cities listed in Nigeria, Onitsha ranks joint 37th of 143 for the warmest August highs and joint 31st of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 27.8°C; Onitsha is 0.6°C warmer than that mean.
From August to September, average highs rise by 0.4°C to 28.7°C, and monthly rainfall rises from 177 mm to 200 mm.
The annual picture
August 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
Onitsha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 34.4°C23.2°C | 23.2°C | 5.1 | 1.1 | 11.812 h |
| February | 34.9°C24.3°C | 24.3°C | 14 | 2.9 | 11.912 h |
| March | 33.8°C24.7°C | 24.7°C | 47 | 9.5 | 12.112 h |
| April | 32.1°C24.5°C | 24.5°C | 95 | 16.0 | 12.312 h |
| May | 30.6°C24.0°C | 24.0°C | 142 | 23.0 | 12.412 h |
| June | 29.0°C23.3°C | 23.3°C | 184 | 25.5 | 12.512 h |
| July | 28.2°C22.8°C | 22.8°C | 178 | 25.9 | 12.412 h |
| August, selected | 28.3°C22.7°C | 22.7°C | 177 | 23.2 | 12.312 h |
| September | 28.7°C23.0°C | 23.0°C | 200 | 26.8 | 12.212 h |
| October | 29.3°C23.2°C | 23.2°C | 155 | 23.1 | 12.012 h |
| November | 30.8°C23.4°C | 23.4°C | 29 | 5.6 | 11.812 h |
| December | 33.1°C23.3°C | 23.3°C | 4.3 | 0.9 | 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
August in nearby cities
- Nkpor in AugustNigeria · 5 kmHigh 28.0°C · Low 22.4°C · 177 mm rain
- Asaba in AugustNigeria · 8 kmHigh 28.5°C · Low 22.9°C · 177 mm rain
- Atani in AugustNigeria · 16 kmHigh 28.4°C · Low 22.7°C · 188 mm rain
- Nnewi in AugustNigeria · 21 kmHigh 27.8°C · Low 22.1°C · 232 mm rain
- Igbo-Ukwu in AugustNigeria · 30 kmHigh 26.7°C · Low 20.9°C · 232 mm rain
- Agulu in AugustNigeria · 31 kmHigh 27.8°C · Low 22.0°C · 232 mm rain
- Awka in AugustNigeria · 32 kmHigh 28.4°C · Low 22.6°C · 182 mm rain
- Ihiala in AugustNigeria · 34 kmHigh 27.7°C · Low 22.0°C · 246 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 Onitsha) is explained once on the Onitsha year overview and on the Sources, method and limits page.
Nkpor and Asaba lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.