The combination of light winds and noticeable amounts of humidity will make it feel more like June than the middle of May, as temperatures will be a good 15 degrees above normal. The only local relief may be with local lake breezes along the immediate shoreline of Lake Ontario over the next couple of days. There will also be a local lake breeze boundary setting up off of Lake Erie. As that boundary advances inland tomorrow it will serve as a trigger for localized afternoon t-storms. Areas southwest of Rochester will have the best chance of seeing one of those thunderstorms. One or two could even produce briefly gusty winds and a downpour.
Any rain we do receive in the area will be beneficial for a couple of reasons. Besides the fact that we are running a rainfall deficit for Spring, the air quality over Western New York and the Finger Lakes is deteriorating, thanks to higher ozone counts along with increasing pollen counts. So the showers and thunderstorms that pop, although a nuisance to some with outdoor plans, will not washout those plans, and will provide some relief to both the dry soil and to the quality of the air you breath.