Not every place gets snow or has lots of trees to absorb sound yet sound will travel a longer distance when it's cold out. A cold desert night will carry sound further than a hot desert day and there is no snow or trees to absorb that sound. The speed of sound is also affected by the air temperature so there will be a shift to lower frequencies in cold dense air. Lower frequencies can definitely travel farther due to their longer wavelengths and less apparent directionality. This is all just a simplified version of things, but in short, air temperature definitely has an effect on the distance sound can travel if unimpeded by obstacles.