Climate averages 1991–2020
Onitsha weather
in January.
A very hot, very dry month: the 2nd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a very hot month in Onitsha: daytime highs average 34.4°C and nights cool to about 23.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 5.1 mm of rain on roughly 1 day, which makes January a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 48 min on an average January day.
The nearest other city in this atlas is Nkpor (5 km away). In January its highs average 34.0°C, about as warm as Onitsha, with 5.1 mm of rain.
Among the 143 cities listed in Nigeria, Onitsha ranks joint 30th of 143 for the warmest January highs and joint 55th of 143 for the driest January (rainfall, lowest first). The mean January high of those 143 cities is 33.1°C; Onitsha is 1.3°C warmer than that mean.
From January to February, average highs rise by 0.6°C to 34.9°C, and monthly rainfall rises from 5.1 mm to 14 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Nkpor in JanuaryNigeria · 5 kmHigh 34.0°C · Low 23.0°C · 5.1 mm rain
- Asaba in JanuaryNigeria · 8 kmHigh 34.4°C · Low 23.7°C · 5.1 mm rain
- Atani in JanuaryNigeria · 16 kmHigh 34.5°C · Low 23.5°C · 8.4 mm rain
- Nnewi in JanuaryNigeria · 21 kmHigh 33.9°C · Low 22.4°C · 15 mm rain
- Igbo-Ukwu in JanuaryNigeria · 30 kmHigh 32.8°C · Low 21.2°C · 15 mm rain
- Agulu in JanuaryNigeria · 31 kmHigh 34.3°C · Low 22.7°C · 15 mm rain
- Awka in JanuaryNigeria · 32 kmHigh 34.9°C · Low 23.5°C · 9.0 mm rain
- Ihiala in JanuaryNigeria · 34 kmHigh 34.1°C · Low 22.5°C · 17 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.