Looking at weather models, no time soon. Maybe, and that is a big MAYBE, one or two days this upcoming July 5-7th weekend. However, long range models have a Bermuda High anchored off the eastern seaboard which means a continuation of tropical moisture for the foreseeable future. And with warm, moist air in place, it doesn't take much to spark off convection. So, stay tuned to the extended and hope for the best. Sorry I don't have better news for ya.
Staff Meteorologist/Night Observer, KMWN (Mt Washington Obs., NH)