Mexicola ripens in july/august according to this website.
I have researched avocados a lot but i don't have much first-hand experience yet.
I don't know if mexicola fruit can be damaged by light frost, but i would think yes.
One very important thing to understand is that the Young plants can handle NO FROST (or very little)
When they get older their frost tolerance increases.
So they have to be protected from frost for the first 3-4 years i reckon (maybe more)
Once the mexicola tree has a trunk with bark and is 2 to 3 meters tall i would imagine (and hope)
that it then can withstand up to -7 Celsius without damage.
And i think less cold but for longer periods shouldn't be a problem.
Also the soil should have good drainage and not be too wet.
I am worried for my own avocados right now cause i think i haven't protected them well enough
I will try and post pictures of the damage if i have the time.