Data analysis

Since the data represented a daily minimum and maximum temperature as well as daily rainfall in the localities of interest, it was reduced into the monthly and yearly average. The monthly average for the temperature situation was calculated with the relation below:

Tavg = (X Daily Temperatures )/Number of days of the month (38.1)

Since rainfall is not a daily event, the relation below was employed in the calculation of monthly rainfall situation:

Rtoal = X Daily precipitation (38.2)

The average for all the years studied at the different localities and the cumulative average for all the localities altogether were computed.

Fig. 38.1 Map of Nigeria showing some of the stations covered by the study.

Since the maximum and minimum daily temperature situation was taken at each location, formula below was employed in computing the annual temperature average

Equation (38.4) is used for the computation of the annual rainfall average

Ravg = (Total rainfall)/Duration (38.4)

Also, the monthly averages of temperature and rainfall were equally deduced for all the years. In a bid to establish the relationship between the variables, the average temperature and rainfall against the months of the years of study were plotted for all the stations.

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