Climate Overview
The climate in Owerri is hot. The average annual temperature is 27°C and approximately 2053mm of precipitation falls per year. September is the wettest month, receiving around 337mm of rainfall. Owerri sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Owerri sees moderate temperature variation throughout the year, ranging from 22°C to 37°C. February is the hottest month, with daytime highs reaching 37°C and an average of 29°C. January is the coolest month, with minimum temperatures around 22°C and an average of 28°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.
Precipitation
Owerri is a very wet location, receiving approximately 2053mm of precipitation annually, which averages out to around 171mm per month. The wettest month is September, averaging 337mm of rainfall. July and June also tend to see above-average precipitation. The driest month is December, with just 8mm. That's 329mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Owerri is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Owerri, which began on March 20, 2026. Owerri sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in February at around 37°C, while the coldest stretch bottoms out in January near 22°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 24 to 34°C. Rainfall is heavy, totalling around 494mm across the season with a monthly average of 165mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 811mm across the season with a monthly average of 270mm. Winds are generally light, averaging 10km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 696mm across the season with a monthly average of 232mm. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 37°C. Rainfall is relatively light, with around 51mm over the season and a monthly average of 17mm. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Owerri based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
