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312 L. Gianguzzi et al.

Table 3. Average yearly temperature (in °C): maximum and minimum, average, variation, absolute maximum and minimum
temperatures, registered in the stations of Trapani (Duro et al. 1996) and Erice (Ministero dei LL. PP. 1978–96).
Tableau 3. Température moyenne annuelle (en °C): maxima et minima, moyenne, amplitude, maxima et minima absolus, enregistrés
dans les stations de Trapani (Duro et al. 1996) et Erice (Ministero dei LL. PP.1978–96).
Station Maximum Minimum Average Range Max. abs. Min. abs.
Trapani 21.7 14.4 18.1 7.3 41.8 0.1
Erice 17.5 11.9 14.5 5.6 41.0 – 2.7

Table 4. Average monthly and yearly precipitation (mm) and number of rainy days (rd), registered in the stations of Trapani, S.
Andrea di Bonagia (period 1926–85; Duro et al. 1996) and Erice (period 1978–96; Ministero dei LL. PP. 1978–96).
Tableau 4. Précipitations moyennes mensuelles et annuelles (mm) et nombre de jours pluvieux (rd), enregistrées dans les stations de
Trapani, S. Andrea di Bonagia (période 1926–85; Duro et al. 1996) et Erice (période 1978–96; Ministero dei LL. PP. 1978–96).

Stations
S. Andrea Bonagia
Trapani (15 m a.s.l.) (48 m a.s.l.) Erice (756 m a.s.l.)
Month
mm rd mm rd mm rd
January 64.2 10 75.0 10 81.7 10
February 50.8 8 65.6 9 61.8 10
March 44.1 7 60.0 8 71.9 10
April 34.4 5 42.2 6 72.6 8
May 19.2 3 22.6 3 35.2 5
June 8.0 1 8.9 1 6.5 2
July 1.7 – 2.6 – 4.0 –
August 9.5 1 15.1 1 10.0 1
September 35.3 3 55.7 4 49.3 4
October 71.1 7 89.3 7 90.6 7
November 69.6 8 85.1 9 86.4 10
December 75.1 11 78.6 11 82.0 11
Year 483 64 602.7 69 651.3 78
a.s.l., above sea level.

Figure 4. A view of the calcareous rocky ridges in the station of Mount S. Giuliano (Erice).
Figure 4. Crêtes calcaires dans la station du Mont San Giuliano (Erice).