Water

As noted by RocWiki, the sun always shines in Rochester (at the proper altitude.)  The reality is that a few clouds can be seen in the Rochester sky from time to time.  And from time to time, the clouds can bring a touch of precipitation.  Precipitation comes from the condensation of water vapor in the atmosphere and subsequently falls to the surface of the earth.  Aside from giving local meteorologists a challenge and causing many a Rochesterian to whine, precipitation provides one other thing...water.  Thanks to this water, Rochester does not have:

• Extreme to exceptional drought, as is being seen in much of the country's most populated state

On the other hand, Rochester does have:

• 7% of the world's fresh water supply