summary, summery

Summary or summary means a short version or synopsis--
Write a one-page summary of the next chapter. Make sure to include the main points.
His summary of the sports article failed to mention the winning team.
Summary may also mean quick, or lacking ceremony, as in a legal proceeding--
He didn't have to wait for a trial, as it was a summary offense.
They took the soldier to the commanding officer for a summary court-martial.

Summery or summery describes something that seems like, or reminds us, of June, July, and August--
This summery weather makes me want to visit the beach.
She went shopping for a hat top go with her summery flowered dress.

Now that you know that, you can say--
"He was assigned to write a summary of recent events, but he could only think of the summery weather."