Summary: The paper is using 5-year data series from four meteorological stations situated respectively on the northern, southern, western and eastern boundaries of this country. For every month, the equation of linear regression, the correlation coefficient and some other parameters are determined. It is found that the correlation coefficient is fluctuating, according to the various months and various observing stations, in the range of –0.50 to –0.85. The strongest correlation is found in September and during the summer months. The value of the regressional coefficient is fluctuating around the value of 1°, while the residual scatter is higher than 2°.
The highest values of the diurnal amplitude computed under the assumption of identical nebulosities are'occurring in May, in contrast to the observed amplitudes, which are reaching their highest values in the summer and in September.
The results of this investigation are indicating that the relation existing between diurnal temperature amplitude and nebulosity is a similar one in the different areas of this country.
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