2.2. Site climate
Lleida has a climate classified as Dry Mediterranean Continental,
characterized by its great seasonal variations. It has low
rainfall, that is divided in two seasons, spring and autumn and it
has a thermometric regime with large differences between a long
winter (between the spring and the last frost may take more than
160 days) and a very hot summer. The average annual rainfall is
between 350 and 550 mm and the mean annual temperatures
oscillate between 12 and 14 C, with thermal amplitudes of
17e20 C. A special mention must be made to the fog, typical of
the region in the months of November, December and January that
can give a period of up to 55 days in the absence of sunlight.
Table 1 summarizes the normal climatic values for the area of
Lleida