121             Pirdop                                  precipitation
        jan     feb     mar     apr     may     june    july    aug     sep     oct     nov     dec
1961    20      11      44      45      84      90      34      38      15      7       106     45
1962    10      55      69      59      52      48      62      28      9       91      71      50
1963    109     52      20      62      93      81      57      4       15      114     26      48
1964    9       28      24      46      125     40      70      58      122     35      60      41
1965    45      38      25      61      105     50      11      29      2       6       44      69
1966    37      12      61      66      78      118     35      87      26      50      70      77
1967    19      23      37      70      104     90      49      63      56      6       56      35
1968    25      39      35      2       107     83      47      113     70      4       96      63
1969    81      55      66      47      32      210     83      102     101     0       17      78
1970    16      80      54      44      85      130     130     28      10      48      26      9
1971    27      40      82      20      106     81      64      76      66      42      26      24
1972    20      33      24      18      53      74      74      128     102     151     30      1
1973    30      38      50      107     52      86      91      39      27      28      35      83
1974    26      20      17      41      80      86      35      34      19      35      50      75
1975    7       21      35      11      159     100     189     101     26      39      47      11
1976    19      17      28      78      101     80      142     103     19      45      100     30
1977    24      46      27      40      60      142     84      56      51      4       50      44
1978    26      50      45      53      75      90      38      58      82      19      10      52
1979    56      21      13      45      179     48      76      114     24      57      46      9
1980    41      23      30      81      122     31      38      83      8       65      39      38
1981    32      34      38      50      115     97      100     28      13      42      51      43
1982    19      21      24      61      64      57      80      94      9       42      35      77
1983    24      13      16      35      39      153     133     30      27      17      31      44
1984    35      40      42      44      74      57      40      74      32     1000    1000     40
1985   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000
1986   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000
1987   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000
1988   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000
1989   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000
1990   1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000    1000