Bihourly surface air temperature data are analysed for Casablanca
meteorological station, in Havana City, Cuba in the period from 1919 to 1995. From the
annual distributions of data, three different ranges of precision in measurements can be
observed. Annual modes of temperatures are calculated as well as it's frequency of
occurrence and it's behaviour is analysed, showing a highly significant growing trend for
the formers and a highly significant decreasing trend for the latter's. An analysis is
carried out for the subseries from 1964 - 1995 where hourly data are available and a
homogeneous behaviour is observed. Modes are calculated for the period 1919 - 1997 from
temperature data with precision of 1 °C, as well as it's frequency of occurrence. It
shows that even though the formers have a significant growing trend, the latter's behave
homogeneously. Conclusions and recommendations are given.
