–
Staff Writer
·
May 2, 2026
Ever wondered where the expression “once in a Blue Moon” comes from? This May in Chicago is your chance to find out.
A rare Blue Moon will occur at the end of the month. Here’s what it means and when you can see it!
All about the Blue Moon
Photo/Shutterstock
Despite its name, the Blue Moon has nothing to do with its color.
Blue Moon is the name given to a second full moon to occur during a single calendar month, according to Space.com.
The phenomenon of two full moons in a single month typically occurs every 2 to 3 years.
The first full moon of May 2026, called the “Flower Moon,” will take place tonight. Unfortunately for Chicagoans, we’re unlikely to see it due to overcast skies.
But no worries, we’ll get a second chance to bask in the full moon glow later this month.
Photo/Shutterstock
The Blue Moon will light up the skies on the evening of May 31.
By that point, there’s a good chance that peak spring shower season will be behind us, so some breathtaking views could be in store.
As for where to watch the Blue Moon rise, the best viewing areas are ones with little light pollution.
We recommend heading to lakefront destinations like the Adler Planetarium Peninsula or Montrose Moonrise Observation Point for sweeping, unobstructed Blue Moon gazing.