
It is wonderful to run into a rainbow with camera in hand, even a faint one like this. This rainbow appeared at dusk, coincidentally at the same time as a partial solar eclipse at Gillson Park in Wilmette, Illinois on May 20, 2012. Nearly missed it as I was facing the sunset. Fortunately, my daughter pointed it out.
Here are a few other rainbow images from the past.

From the observation deck overlooking Lake Michigan at the Kenilworth Beach on September 23, 2011.

From the 24th floor of 401 North Michigan Avenue overlooking the Sheraton Hotel and the Chicago River in downtown Chicago on August 23, 2011.

On Newcomb Hollow Beach overlooking the Atlantic Ocean on Newcomb Hollow Beach in Wellfleet, Massachusetts on August 1, 2011.

A double rainbow at Nationals Park in Washington, D.C. on June 23, 2008.