Landform and water body has a great impact on climate.

It needs to be understood that Weather deals with short DURATION say a few days, while climate is a regional phenomenon which does not change.

Landforms and water bodies can affect both short-term weather and long-term climate.

The Spinning Earth:

Because Earth's on its own axis in a counter-clockwise direction.

Therefore, MAJOR weather systems in the Northern Hemisphere generally is driven move from west to east.

This system travel over landforms or bodies of water, they may gain or lose heat and moisture content accordingly.

Mountains and Rainfall:

TALL Himalayan mountain ranges act as an obstacle to traveling air masses, pushing them to rise over their lofty peaks.

Accordingly, ambient TEMPERATURES drop. water vapor cools, fog is formed, and rain or snow may fall on the wind direction of the mountain.

When the same air mass descends on the other side of the mountain, it carries a minimal amount of water vapor.

Oceans:

Air masses that travel over water bodies often PICK up a substantial amount of water vapor. In the case of an ocean, the air mass may contain more amount of moisture when it reaches the far shore.