Avocados ripen best naturally at room temperature, so put them in your fruit bowl and let nature do its thing. Never put them on your windowsill or in direct sun to ripen. They can ripen faster in the company of bananas or kiwifruit which give off natural ripening gases.
ESIMTATED RIPENING TIMES:
Below are estimations on ripening times from picking date for each month; however, keep an eye on the appearance of the avocado because times will vary depending on your individual climate. The skin of Hass avocados turn from green to a purplish-brown when ripe and ready to eat. Some people put their avo's in the fridge when a couple of days away from being ripe then bring them out to finish ripening when they want to use them, but you shouldn’t try and store them for more than a week or two.