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Onitsha, Nigeria climate
As Tropical savanna (dry summer)
Onitsha has a remarkably steady tropical climate (Tropical savanna (dry summer), Köppen As). The hottest month is April with an average daily high near 86°F, while the coldest is January averaging around 67°F at night. Precipitation totals about 59 inches a year and is strongly seasonal — September alone averages 8.7 inches while December barely receives 0.43 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Onitsha climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 87 | 87 | 86 | 85 | 83 | 82 | 83 | 83 | 83 | 85 | 85 |
| Avg temp (°F) | 76 | 79 | 81 | 81 | 80 | 78 | 77 | 77 | 78 | 78 | 79 | 76 |
| Avg low (°F) | 67 | 71 | 74 | 75 | 75 | 73 | 72 | 72 | 73 | 73 | 72 | 68 |
| Precipitation (in) | 0.5 | 0.9 | 2.7 | 5.1 | 7.0 | 8.4 | 8.0 | 7.7 | 8.7 | 7.6 | 2.0 | 0.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 87 | 87 | 86 | 85 | 83 |
| Avg temp (°F) | 76 | 79 | 81 | 81 | 80 | 78 |
| Avg low (°F) | 67 | 71 | 74 | 75 | 75 | 73 |
| Precipitation (in) | 0.5 | 0.9 | 2.7 | 5.1 | 7.0 | 8.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 82 | 83 | 83 | 83 | 85 | 85 |
| Avg temp (°F) | 77 | 77 | 78 | 78 | 79 | 76 |
| Avg low (°F) | 72 | 72 | 73 | 73 | 72 | 68 |
| Precipitation (in) | 8.0 | 7.7 | 8.7 | 7.6 | 2.0 | 0.4 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | 0.8 | 3 | 3 | 1 | 0.4 | — | — | — | — | — | 0.0 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | 0.8 | 3 | 3 | 1 | 0.4 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with high ≥ 90°F (days) | — | — | — | — | 0.0 | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 57 | 74 | 77 | 75 | 77 | 84 | 86 | 83 | 75 | 55 | 38 |
| Relative humidity (%) | 72 | 77 | 84 | 87 | 88 | 90 | 90 | 90 | 90 | 90 | 85 | 75 |
| Wind speed (mph) | 3.7 | 3.6 | 3.8 | 3.9 | 3.6 | 4.1 | 4.8 | 5.0 | 4.1 | 3.3 | 2.6 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 42 | 57 | 74 | 77 | 75 | 77 |
| Relative humidity (%) | 72 | 77 | 84 | 87 | 88 | 90 |
| Wind speed (mph) | 3.7 | 3.6 | 3.8 | 3.9 | 3.6 | 4.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 84 | 86 | 83 | 75 | 55 | 38 |
| Relative humidity (%) | 90 | 90 | 90 | 90 | 85 | 75 |
| Wind speed (mph) | 4.8 | 5.0 | 4.1 | 3.3 | 2.6 | 3.0 |
Methodology & sources
Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.