My little boy is 8 months and we just broke him of needing to be swaddled to sleep. (Because of the warming weather, like you.) We put it off for so long because he had such a strong desire to be swaddled, to the point of waking up if his arm got out (which meant I had to get up a lot at night). However when we'd let him settle down on his own to sleep, he'd loosen his swaddling and then he wouldn't calm down until he was wrapped again, etc, and we were having such a hard time getting him to learn to fall asleep on his own. (plus he would get hot so easily, even with the lightest of blanket) Finally we just had to make a game plan (helps to know exactly what you plan to do so that you will STICK TO IT) and we did his bed time routine and put him in his crib on his side. Then we would go in every 5 minutes (we had set a timer) to pat his back or hand him his binky, or just to make sure he was alright. He rolled to his tummy, which he doesn't like, but we let him stay like that, and after an hour and 15 minutes he fell asleep. Since he was on his tummy his arms wouldn't flail in his sleep and wake him up (same effect as swaddling) and he slept soundly until 5 when I woke him up to nurse him, then he slept til 8. (he can roll back and forth easily or else I wouldn't let him sleep on his tummy) The same thing has happened all the nights since, I end up waking him up to eat around 5 (though I'm trying to get to a point where I don't have to) and he sleeps soundly (as opposed to getting up 2-4 times a night like he had been doing). Hope this helps you!