Wind speed, precipitation, extreme daily precipitation I am trying to figure out what type of precipitation lifting mechanism occurs in a area that is unknown but I know some facts about the climate. So I know that there are 4 precipitation lifting mechanisms - frontal, convection, convergent and orographic. So based off the extreme daily precipitation I need to choose one of these and back up my statement. So I have concluded that the area is inland because the temperature range is from -10 to 20, which is larger than most coastal temperature ranges. So I am hoping that this fact will eliminate one of the lifting mechanisms. So the extreme daily precipitation goes as follows.  

Jan:65mm
Feb:54mm
Mar:64mm
Apr:75mm
May:80.3mm
June:92.8mm
Jul:92mm
Aug:86mm
Sep:90mm
Oct:87mm
Nov:82mm
Dec: 76.4  

What type of lifting mechanism is responsible for the most extreme precipitation events? Then I need to back it up with the amount of days with the winds greater then 52km/hr which is only 8, and the yearly average wind speed is only 12.9.  

My thinking is that I don't believe its orographic. But I am not sure which it is out of the other 3. There is not much wind all year around so this must be a factor, and there is a moderated amount of extreme precipitation all year around(shown by the data I provided)
Sometimes it is obvious, but it may not be possible to attribute the rainfall mechanism from the daily rainfall. Also, the four lifting mechanisms are not 'either / or'. There are frequently combinations of the above, particularly in respect of the most extreme events.