Photo date: October 26, 2016. Photographer: Mark Mahin.
The photo below shows a swarm of orbs I photographed on a dry night in New York City.
There was no fog, mist, rain or precipitation on this night. The air quality listed on airnow.gov was "good," with a level of 27 (anything below 50 is good). The pollen level listed on pollen.com was low, with a level of 1.1.