Onitsha Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Onitsha.
Climate overview of Onitsha
With consistently stable weather, Onitsha, Nigeria, sees little seasonal temperature change. Daytime highs average 33°C (91°F), ranging from 37°C (99°F) in February to 30°C (86°F) in August.
Rainfall is high, totalling around 1463 mm (58 in) per year. September is the wettest month and December the driest. The city also experiences distinct dry (December to February) and wet (June to October) seasons.
Onitsha Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Onitsha - and find the best time to visit.
Monthly Temperature in Onitsha
The climate in Onitsha remains fairly constant, offering very warm temperatures throughout the year. Average maximum daytime temperatures range from a very hot 37°C (99°F) in February, the warmest time of the year, to a comfortable 30°C (86°F) during cooler months like August.
At night, you can expect temperatures ranging from 25°C (77°F) in February to around 23°C (73°F) during August.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Onitsha
Onitsha is known for its substantial rainfall, with annual precipitation reaching 1463 mm (58 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 227 mm (8.9 in) of precipitation, recorded across 19 rainy days. In contrast, the driest month December brings less rainfall, with 9.9 mm (0.4 in) over a single rainy day. For more details, please visit our Onitsha Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Onitsha
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: November
- Warmest weather: January, February and March
- Fewest rainy days: January, February, November and December
- Seasonal pattern: Distinct dry (December to February) and wet (June to October) seasons
Frequently asked questions about the climate in Onitsha
What is the best time to visit Onitsha?
November typically offers the most optimal weather in Onitsha. In contrast, January, February, March, April, May, June, July, August, September, October and December tend to have less optimal conditions. Onitsha has distinct dry (December to February) and wet (June to October) seasons.
What temperatures can I expect in Onitsha?
Daytime highs range from 30°C (86°F) in August to 37°C (99°F) in February. Nighttime lows range from 23°C (73°F) to 25°C (77°F). Temperatures stay relatively stable year-round.
How much rain does Onitsha get?
Annual rainfall is around 1463 mm (58 in). September is the wettest month with 227 mm (8.9 in), while December is the driest with 9.9 mm (0.4 in).
Onitsha 3-Day Forecast
Onitsha on the map
Onitsha is highlighted - select any city to see its climate.
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