Completely Clear Sky
Frequency of Occurrence - Phase of Annual Cycle (Month of Maximum)
1954 - 1997, Ship Observations Only

Grid Box Averages
147 filled boxes
Box #   Lat.N   Lon.E   Phase
    2     85     180      1.7
    5     75      60      2.9
    8     75     180      1.7
    9     75     220      2.1
   12     75     340      4.5
   13     65      10      4.7
   14     65      30      3.4
   15     65      50      4.2
   22     65     190      3.5
   23     65     210      0.9
   31     55      10      5.2
   32     55      30      4.9
   46     55     310      7.8
   49     45       5      7.1
   50     45      15      7.2
   51     45      25      7.3
   52     45      35      7.2
   53     45      45      7.2
   54     45      55      7.1
   62     45     135      1.0
   72     45     235      8.4
   78     45     295      6.7
   79     45     305      6.5
   80     45     315      6.9
   84     45     355      6.8
   85     35       5      6.9
   86     35      15      7.0
   87     35      25      7.3
   88     35      35      7.2
   90     35      55      7.3
   96     35     115      1.4
   97     35     125      2.1
   98     35     135      3.6
   99     35     145      3.1
  108     35     235      8.3
  109     35     245      0.5
  112     35     275      2.4
  113     35     285      3.9
  114     35     295      5.8
  119     35     345      7.8
  120     35     355      7.3
  124     25      35      6.9
  125     25      45      7.7
  126     25      55      7.7
  127     25      65      1.3
  128     25      75      1.3
  129     25      85      1.3
  132     25     115      0.8
  133     25     125      2.7
  134     25     135      2.9
  135     25     145      2.6
  136     25     155      2.8
  137     25     165      2.0
  138     25     175      2.0
  139     25     185      2.2
  140     25     195      2.1
  145     25     245      0.7
  146     25     255      2.9
  147     25     265      2.4
  148     25     275      3.0
  149     25     285      2.8
  150     25     295      2.5
  151     25     305      2.6
  154     25     335     12.4
  160     15      35      5.7
  163     15      65      2.0
  164     15      75      1.4
  165     15      85      2.1
  166     15      95      2.0
  167     15     105      2.6
  168     15     115      2.7
  169     15     125      2.5
  173     15     165      1.7
  174     15     175      1.4
  175     15     185      2.1
  181     15     245      3.5
  182     15     255      2.5
  183     15     265      1.8
  184     15     275      2.0
  185     15     285      2.2
  186     15     295      3.0
  190     15     335      1.8
  191     15     345      2.5
  193      5       5      1.2
  197      5      45     10.1
  198      5      55      7.7
  199      5      65      2.2
  200      5      75      1.7
  204      5     115      3.8
  218      5     255      2.7
  219      5     265      2.1
  220      5     275      2.1
  221      5     285      2.2
  226      5     335      2.8
  227      5     345      2.1
  228      5     355      1.6
  229     -5       5      6.4
  230     -5      15      6.4
  233     -5      45     11.7
  239     -5     105      7.9
  240     -5     115      8.3
  241     -5     125      8.5
  242     -5     135      9.1
  251     -5     225     10.4
  253     -5     245      9.8
  256     -5     275      3.2
  257     -5     285      2.2
  260     -5     315      8.7
  261     -5     325      9.3
  262     -5     335      9.0
  263     -5     345      7.0
  264     -5     355      7.0
  266    -15      15      6.1
  268    -15      35      8.3
  269    -15      45      8.4
  276    -15     115      8.4
  277    -15     125      7.7
  278    -15     135      8.5
  279    -15     145      8.2
  280    -15     155      9.3
  293    -15     285      3.5
  301    -25       5      6.6
  302    -25      15      6.5
  304    -25      35      7.3
  305    -25      45      8.3
  312    -25     115      9.1
  315    -25     145      8.1
  316    -25     155      8.2
  317    -25     165      9.5
  332    -25     315      7.5
  333    -25     325      7.5
  338    -35      15      4.5
  339    -35      25      6.5
  340    -35      35      6.7
  348    -35     115      1.3
  349    -35     125     10.2
  350    -35     135      0.8
  351    -35     145      1.5
  352    -35     155      8.2
  363    -35     265      1.7
  364    -35     275      3.0
  365    -35     285      3.9
  368    -35     315      8.8
  390    -45     175      4.5
  405    -45     325      0.5
  423    -55     290      7.4
  425    -55     330      7.6