Summer in Mars lasts for about 178 Martian Days.
668.5991 Mars days.
It could be any of the four seasons, depending upon what year it is. Right now (May 31, 2010), it is summer in the North and winter in the South on Mars. Mars does not have an equal number of days per season. nor does it have the same numbers as Earth. On Mars: Spring: 194 days Summer: 178 days Fall: 142 days Winter: 154 days Thus, the corresponding seasons between Earth and Mars change according to what year it is.
A year on Mars is 687 Earth days long.
A Martian year is about 687 Earth days long or 668.6 Mars days long.
687 days
It takes mars 1.03 days to make a rotation
The orbital period of Mars is 686.971 days.
99 days on earth is one year on mars
There are reckoned to be 92 days in the northern hemisphere summer.
676 Days, 18.2 Hours
90 days