There will be no seasons. It would be inhabitably cold in the 2 poles, the equator will be tropical and it will be a "wet" season. Rest of the regions will be in an Autumn-like state.
The season
We have seasons, because the earth rotates around the sun, and where we are in the solar system effects what season we're in.
Tilted axis
The axis of the Earth is tilted 23.5 degress from the plane of the orbit round the sun.
Whatever direction you can possibly think of, the earth's axis is tilted by 23.5 degreesin that exact direction once every year.
earth
The seasons are caused by the fact that the Earth's axis is tilted. As the Earth travels around the sun, the hemisphere that is tilted toward the sun changes. Whenever your hemisphere is pointed toward the sun, it is summer in your hemisphere.
When the northern hemisphere is tilted further from the sun it is winter, and vise versa
the Earth rotates on an axis, that axis is tilted with respect to the axis of Earth's orbit, and Earth's orbit is slightly elliptical.
The Sun.
the effects of are because the earth is tilted on its axis
The season
The earth is always tilted on its axis. It is about 23.5o
The Earth's axis is tilted by about 23.5 degrees.
The Earth spins about its axis. That defines the Earth's axis. It is the axis of spin that is tilted. If the Earth were not spinning it would not have an axis.
axis on what? the earth? if yes its tilted
In a way, the Earth's axis IS tilted on its side, that's why we have seasons.