When you shake it, can you hear the seeds rattle? By the color and size of your fruit, it looks like it will ripen but I usually let my fruit turn slightly more yellowish green before harvesting in order to maximize sugars.
If your tree is fully established and you have a regular watering schedule, your fruit will probably not split from the rain but in your case, it looks like you may have already had some cracking prior to the rain so it was a good idea for you to pick it before more damage is done.
The wind from the last storm blew loose a lot of my ripe fruit but the remaining fruit from my trees have no signs of cracking even after all the rain I just received. Giving your trees enough Calcium may help with any cracking issues.
Simon