Seeing as it is currently some 23.4 degrees, the seasons with an axial tilt of only 13 would be somewhat milder. The differences between summer and winter months would be less extreme.
Earth's axis has a tilt of 23.5 degrees; this is what causes seasons. 0 degrees: practically no seasons (there would be minor changes due to a varying distance from the Sun). 45 degrees: seasons would be much more pronounced.
Mainly, there would be no seasons.
There would be no seasons.
The earth is tilted 23.5 degrees. This is what creates the earths seasons. The two hemispheres (north and south) are always on opposite seasons.
its earths tilt on its axis orbiting the sun
There would be no four seasons if the earths axis was not tilted.
Seasons
There would be no four seasons if the earths axis was not titled.
the earth would be weird.
The seasons would switch to six months later (earlier).
Seasons And Climate
The Earth's axis is tiled 23.4 degrees. It tilts away from the perpendicular of its orbital plane which is why seasons are produced on Earth. The earth rotates on its axis 266.26 times each year.