| Seasons | 
        Months | 
        2010 | 
        2011 | 
       
      
        | Station I | 
        Station II | 
        Station I | 
        Station II | 
       
      
        | Post monsoon | 
        January | 
        2.23 | 
        2.18 | 
        2.13 | 
        2.14 | 
       
      
        | February | 
        2.24 | 
        2.32 | 
        2.23 | 
        2.13 | 
       
      
        | March | 
        2.43 | 
        2.52 | 
        2.44 | 
        2.32 | 
       
      
        | Summer | 
        April | 
        2.32 | 
        2.25 | 
        2.12 | 
        2.21 | 
       
      
        | May | 
        2.81 | 
        2.91 | 
        3.02 | 
        2.56 | 
       
      
        | June | 
        2.10 | 
        2.12 | 
        2.10 | 
        2.11 | 
       
      
        | Pre monsoon | 
        July | 
        2.75 | 
        2.78 | 
        2.63 | 
        2.72 | 
       
      
        | August | 
        3.23 | 
        3.42 | 
        3.23 | 
        2.71 | 
       
      
        | September | 
        2.42 | 
        2.37 | 
        2.44 | 
        2.53 | 
       
      
        | Monsoon | 
        October | 
        2.32 | 
        2.48 | 
        2.52 | 
        2.62 | 
       
      
        | November | 
        2.48 | 
        2.52 | 
        2.63 | 
        2.75 | 
       
      
        | December | 
        2.90 | 
        2.82 | 
        2.72 | 
        2.81 | 
       
      |