The month of October witnessed low wetter than normal conditions compared to September which is a clear indication of end of rainy season over the country. Though normal condition prevailed, appreciable degree of wetness especially over Sokoto axis of the extreme North was recorded. Notable as well is mild to moderately wetness recorded over places like Zaria, Kaduna, Minna Lokoja, Makurdi, Ibi in the North and few places in the South like Calabar and parts of Enugu, Benin and Oshogbo.
As expected, the month of September was wetter than August. While normal rainfall condition prevailed over greater parts of the country particularly in the North-western area, mild to moderate wet conditions were observed over places like Minna, Kaduna, Zaria, Nguru, Maiduguri and Yola extending to Makurdi North and Oshogbo, Benin, Enugu, Owerri, Calabar and parts of Port Harcourt in the South. Bauchi experienced extreme wetness. Pockets of mild to moderate dryness were also observed at Gusau, Potiskum, Lokoja, Warri and Ikom.
The month of August in contrast to July shows a widespread of normal rainfall condition in most parts of the country even though mild to extreme wetter than normal condition was observed over places like Minna, Kaduna, Zaria, Kano, Nguru and parts of Bauchi, Potiskum, Maiduguri and Katsina respectively while mild to dry conditions was the case over Sokoto, Gusau, Yelwa, Ibi, Bauchi, Warri, Benin and Lagos. Notable is the severe to extreme dry conditition recorded over Jos compared to the extreme wetter than normal condition recorded in June and July respectively.
The month of July is significantly wetter than June, as the entire country dwells under normal to extreme wetter conditions. The North down to the central parts of the country in this regard was of great interest in terms of degree of wetness particularly over Bauchi, Jos, Makurdi, Ibi and parts of Maiduguri compared to the South which may be due to the effect of the little dry season which occurred in the third decade of July.
Significant wetter condition experienced during the month of June in almost every part of the country is a clear indication of establishment of rainfall season particularly over the Northern region. Noticeable is the moderate to extreme wetness over Kano, Nguru and parts of Katsina in the North with Benin, Ikom, Warri and Ikeja in the South. Meanwhile, stations like Yelwa and others in the Northwestern flank of the country were characterized with mild to severe dryness.
Widespread of wetter than normal to normal condition experienced during the month of May in almost every part of the country is an indication of rainfall season particularly over the Northern region. Noticeable is the severe to extreme wetness over Jos and parts of Bauchi, Kaduna and Zaria in the North with only Benin in the South. Nonetheless, Lagos and Ikeja stations in the South experienced mild dryness during the month under review.
During the month under review, most parts of the country were under normal condition except Yelwa, Ilorin, Makrudi and Ibi in the North with only Port Harcourt in the South that was mildly wet. Also, Yola, Potiskum, parts of Maiduguri and Bauchi in the North while Warri and Calabar in the South were under mild to moderately dry condition compared to normal. The 1-month Standardized Precipitation Index (SPI) analysis over the country reveals most parts of the country to be under normal condition.
The substantial rainfall witnessed in February at some parts of the country particularly in the South turned out to be a false start of rains as the intensity significantly dropped. Normal condition continued to dominate the rest of the country especially over the North while mild to severe dry conditions persisted over the Southern part of the country.
The month of February witnessed gradual return of rainfall in some parts of the country particularly in the South, while normal condition continued to dominate the rest of the country especially over the North. Noteworthy is the degree of wetness in the South, which ranged between mild and extreme condition. As in January, the analysis of the cumulative 6-month SPI also shows minimal threat to groundwater aquifers in some Northern parts of the country particularly over Potiskum, Sokoto and parts of Gusau and Katsina.
Continued dominance of normal condition over almost the entire country particularly in the North is still an indication of current dry season usually characterized by widespread of rainfall shortage and hazy weather. Nonetheless, few places in the South such as Benin, Ikom and Enugu experienced mild to moderate wetness during the period under review. The analysis of the cumulative 6-month SPI which reveals a near to threatened groundwater aquifers in some Northern parts of the country may remain particularly over Potiskum, Sokoto and parts of Minna, Gusau and Katsina.