5 Things You Need to Know Today: May 10

1. Arboretum: Lilac Sunday is this weekend.

2. BAPA: The next meeting of the Jamaica Plain Business and Professional Association is May 15 at James's Gate.

3. Weather: Yesterday was a typical summer day. We had thunder, lightning, humidity and sunshine all in one afternoon. You may expect more of the same today.

4. Bike Week: The state celebrates Bike Week May 11 to 19.

5. Mother's Day: Don't forget: It's this Sunday.