| 
      
        | Seasons | Months | 2010 | 2011 |  
        | Station I | Station II | Station I | Station II |  
        | Post monsoon | January | 0.952 | 0.953 | 0.956 | 0.957 |  
        | February | 0.941 | 0.948 | 0.942 | 0.945 |  
        | March | 0.954 | 0.959 | 0.953 | 0,954 |  
        | Summer | April | 0.943 | 0.948 | 0.949 | 0.947 |  
        | May | 0.952 | 0.953 | 0.954 | 0.956 |  
        | June | 0.948 | 0.946 | 0.947 | 0.949 |  
        | Pre monsoon | July | 0.953 | 0.954 | 0.956 | 0.957 |  
        | August | 0.959 | 0.959 | 0.958 | 0.956 |  
        | September | 0.948 | 0.949 | 0.949 | 0.947 |  
        | Monsoon | October | 0.921 | 0.923 | 0.924 | 0.926 |  
        | November | 0.841 | 0.846 | 0.847 | 0.849 |  
        | December | 0.952 | 0.953 | 0.954 | 0.955 |  |