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Onitsha Weather and Climate: A Comprehensive Guide

Onitsha has relatively stable weather with very warm temperatures. It also has a notably wet climate with much precipitation. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

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 in February, the warmest time of the year, to a comfortable 30°C during cooler months like July.

At night, temperatures typically drop to an average of around 23°C during these months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Onitsha is known for its substantial rainfall, with annual precipitation reaching 1463 mm. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, September receives heavy rainfall, averaging 227 mm of precipitation, recorded across 19 rainy days. In contrast, the drier season, December brings less rainfall, with 9.9 mm 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

Forecast for Onitsha

Friday
21 Feb
Partly cloudy
Partly cloudy
33°C
0.5 mm
Saturday
22 Feb
Light rain
Light rain
33°C
1.4 mm
Sunday
23 Feb
Light rain
Light rain
32°C
2.2 mm

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Onitsha in Nigeria

Other facts from our historical weather data:
  • Which months have the greatest rainfall in Onitsha?
    Most rainfall (rainy season) is seen in May, June, July, August, September and October.
  • Does Onitsha have a dry season?
    Yes, the months of January and December are very dry.
  • Which is the hottest month in Onitsha?
    February has an average maximum temperature of 37°C and is the hottest month of the year.
  • Which is the coolest month in Onitsha?
    The coolest month is August with an average maximum temperature of 30°C.
  • Which is the wettest month in Onitsha?
    September tops the wettest month list with 227 mm of rainfall.
  • Which is the driest month in Onitsha?
    December is the driest month with 10 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.