Why is Western Russia warmer than Eastern Russia?

Western Russia is warmer than Eastern Russia primarily due to its geographical location and climate influences. It is closer to the Atlantic Ocean, which moderates temperatures and brings milder air masses. In contrast, Eastern Russia, particularly Siberia, is more continental and experiences harsher winters and extreme temperature variations, as it is further from oceanic influences and subject to cold Arctic air. Additionally, Western Russia has a more diverse topography that can affect local climate patterns, contributing to its relatively warmer conditions.