D2 CLIMATIC

<< Climatic data at Abiko >>
YEAR: 1981-1985

                    Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec     Ann.
-----------------------------------------------------------------------------------------------------------------------------
Mean temp. [deg C]  2.6     3.4     6.6     12.5    17.5    19.6    24.1    26.5    21.5    16.0    10.4    5.3     13.8
Precipition [mm]     23      68     110     122      90     192     102     105     167     149      78      22    1,228


<< Number of hours of bright sunshine >>
   2,370 hr yr-1


<< Water temperature [deg C] >>
Lake centre

Month     Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec
---------------------------------------------------------------------------------------------------------
Depth [m]
  0.2     3.7     5.4     8.2     16.8    19.6    22.3    26.2    28.4    25.1    19.9    12.0    6.6