Owerri climate
Owerri (Nigeria) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 26 °C78 °F, and about 1,841 mm72 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Owerri climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3085 | 2068 | 2577 | 150.6 |
| Feb | 3087 | 2272 | 2679 | 341.3 |
| Mar | 3086 | 2374 | 2780 | 732.9 |
| Apr | 3086 | 2475 | 2780 | 1295.1 |
| May | 2985 | 2374 | 2680 | 1787.0 |
| Jun | 2883 | 2373 | 2678 | 2459.7 |
| Jul | 2882 | 2272 | 2577 | 2419.5 |
| Aug | 2882 | 2271 | 2577 | 2529.9 |
| Sep | 2882 | 2272 | 2577 | 33513 |
| Oct | 2883 | 2373 | 2578 | 2278.9 |
| Nov | 2985 | 2373 | 2679 | 943.7 |
| Dec | 3085 | 2170 | 2578 | 180.7 |
| Year | 3087 | 2068 | 2678 | 1,84172 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 75% | 47% | 5.0 | 11:50 |
| Feb | 81% | 61% | 4.9 | 11:56 |
| Mar | 86% | 79% | 4.9 | 12:05 |
| Apr | 88% | 82% | 4.9 | 12:14 |
| May | 89% | 81% | 4.7 | 12:22 |
| Jun | 90% | 85% | 4.2 | 12:26 |
| Jul | 90% | 89% | 3.8 | 12:25 |
| Aug | 90% | 90% | 3.7 | 12:18 |
| Sep | 91% | 90% | 4.1 | 12:08 |
| Oct | 90% | 84% | 4.5 | 11:59 |
| Nov | 87% | 65% | 4.8 | 11:52 |
| Dec | 78% | 46% | 5.0 | 11:48 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Owerri is like
The warmest month is March, with an average high of 30 °C86 °F and a low of 23 °C74 °F. The coldest is January, when highs average 30 °C85 °F and lows 20 °C68 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 2 °C3.7 °F.
It is wet, with about 1,841 mm72 in of precipitation per year. The wettest three-month stretch is July–September, which brings 45% of the annual total. Months with less than 20 mm0.8 in on average: December and January. The wettest month is September (335 mm13 in), the driest is January (15 mm0.6 in).
Relative humidity ranges from 75% in January to 91% in September. The clearest skies (lowest average cloud amount, 46%) are typical of December. Average wind speed near the ground ranges from 4 km/h (2 mph) in November to 6 km/h (4 mph) in August.
Best time to visit Owerri
Based on these averages, the most comfortable months for sightseeing and outdoor activities are December and January: average highs of 30 °C85 °F to 30 °C85 °F with 15 mm0.6 in to 18 mm0.7 in of precipitation per month.
The most challenging month is September, which is very wet (335 mm13 in) and humid (91% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Owerri
- Wetter months (May–October) — highs 2882 to 29 °C85 °F, lows 2271 to 23 °C74 °F, about 246 mm9.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (November–April) — highs 2985 to 30 °C87 °F, lows 2068 to 24 °C75 °F, about 60 mm2.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Owerri compares
Compared with Aba, about 56 km to the southeast, Owerri has practically the same average temperature and receives 21% less precipitation (1,841 mm72 in vs 2,315 mm91 in).
Of the 74 places in Nigeria covered by World Climates, Owerri is the 41st warmest by annual mean temperature and the 10th wettest by annual precipitation. See all of them on the Nigeria climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Man (Ivory Coast, Aw), Duekoué (Ivory Coast, Aw) and Rio Branco (Brazil, Aw).
Nearby places
- Umuahia 51 km · 25 °C77 °F · 1,791 mm70 in
- Okigwe 52 km · 25 °C77 °F · 1,653 mm65 in
- Aba 56 km · 26 °C78 °F · 2,315 mm91 in
- Port Harcourt 79 km · 26 °C79 °F · 2,320 mm91 in
- Onitsha 79 km · 26 °C79 °F · 1,705 mm67 in
- Awka 81 km · 26 °C78 °F · 1,705 mm67 in
- Okrika 83 km · 26 °C79 °F · 2,520 mm99 in
- Buguma 85 km · 26 °C79 °F · 2,520 mm99 in
Frequently asked questions
What is the warmest month in Owerri?
March is the warmest month in Owerri, with an average high of 30 °C (86 °F) and an average low of 23 °C (74 °F).
What is the coldest month in Owerri?
January is the coldest month, with an average high of 30 °C (85 °F) and an average low of 20 °C (68 °F).
When does it rain the most in Owerri?
September is the wettest month with about 335 mm (13.2 in) of precipitation; January is the driest with about 15 mm (0.6 in).
What is the best time to visit Owerri?
Judging by long-term averages, the most comfortable months are December and January.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.