Five Things You Need To Know Today, August 8

1. Weather: The National Weather Service is predicting a warm, sunny day with a high of 87. The evening will cloud over and the temperatures will drop to 69 degrees.

2. Free blood pressure check: There's no greater medicine than prevention. Get your at the  on High Street starting at 3 p.m..

3. Jorge Arce Presents Arfo-Caribeno for Children: The Boston Public Library invites you to bring the kids down to the Rabb Lecture Hall from 10:30 to 11:20 a.m. to learn about the Caribbean culture and music for free.

4. Hubway Rolls in to Town: The Hubway Bicycle Share System is expanding into Cambridge, Somerville Brookline, Chinatown and Dorchester. The Rolling Launch Party starts today at 9 a.m. 

5. Mayor Menino’s Wednesday Night Concerts: Head down to City Hall Plaza at 7 p.m. to hear the United States Air Force Band of Liberty play for free.