 By August , as the serviceability and the quantity of the Luftwaffe 's inventory steadily reduced due to combat , while demand for air support only increased as the VVS stubbornly resurged , the Luftwaffe found itself struggling to maintain local air superiority in the front lines . Also with the onset of bad weather in October , the Luftwaffe was on several occasions forced to halt nearly all aerial operations . The VVS , although faced with the same weather difficulties , had a clear advantage thanks to the prewar experience with cold @-@ weather flying techniques , and the fact that they were operating from intact airbases and airports . By December , the VVS had matched the Luftwaffe and was even pressing to achieve air supremacy over the battlefields . 
