Climate averages 1991–2020
Onitsha weather
in December.
A hot, very dry month: the 4th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Onitsha: daytime highs average 33.1°C and nights cool to about 23.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 4.3 mm of rain on fewer than one day, which makes December a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 46 min on an average December day.
The nearest other city in this atlas is Nkpor (5 km away). In December its highs average 32.7°C, about as warm as Onitsha, with 4.3 mm of rain.
Among the 143 cities listed in Nigeria, Onitsha ranks joint 46th of 143 for the warmest December highs and joint 55th of 143 for the driest December (rainfall, lowest first). The mean December high of those 143 cities is 32.4°C; Onitsha is 0.7°C warmer than that mean.
From December to January, average highs rise by 1.3°C to 34.4°C, and monthly rainfall rises from 4.3 mm to 5.1 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Nkpor in DecemberNigeria · 5 kmHigh 32.7°C · Low 23.1°C · 4.3 mm rain
- Asaba in DecemberNigeria · 8 kmHigh 33.1°C · Low 23.7°C · 4.3 mm rain
- Atani in DecemberNigeria · 16 kmHigh 33.2°C · Low 23.5°C · 7.2 mm rain
- Nnewi in DecemberNigeria · 21 kmHigh 32.6°C · Low 22.5°C · 13 mm rain
- Igbo-Ukwu in DecemberNigeria · 30 kmHigh 31.4°C · Low 21.3°C · 13 mm rain
- Agulu in DecemberNigeria · 31 kmHigh 32.8°C · Low 22.7°C · 13 mm rain
- Awka in DecemberNigeria · 32 kmHigh 33.4°C · Low 23.4°C · 7.4 mm rain
- Ihiala in DecemberNigeria · 34 kmHigh 32.7°C · Low 22.5°C · 16 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.