What are the Precipitation/Rainfall Indices (PRI’s)?

The Precipitation/Rainfall Indices provide data on the rainfall dispersion during the whole year, or precipitation amounts during the growing season, for example in either the bloom or the ripening period.  Typical recorded rainfall/precipitation periods are:
Annual rainfall from  –  01.01 to 12.31 (mm)
Summer rainfall from  –  06.01 to 07.01 (mm)
Winter rainfall from  –  11.01 to the next year 03.31 (mm)
Bloom period precipitation from  –  15May to 15June (mm)
Ripening period precipitation from  –  15August to 15October (mm

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