5 Things You Need to Know Today: May 20

"Five Things you Need to Know Today" is a Patch column that provides readers with essential, daily information at a glance.

1. There is a chance of more rain and possibly thunderstorms this afternoon. Temperatures are expected to be in the 60s, according to the National Weather Service.
2. Congressman Stephen Lynch in a town hall-style forum at 9 a.m. today at the .
3. At around 11 a.m., Lynch will then go to for the grand unveiling of the new photovoltaic system constructed on top of the school.
4. We're keeping you up to date on the latest gas prices in Dedham. According to AAA, the national average dipped to $3.91 yesterday. Here is what we found around town:
   : $3.87
   : $3.83 
   : $3.85
   : $3.93
   : $3.93
   : $3.99 
5. The DHS girls lacrosse team will battle Brookline this afternoon at 4:45 p.m. - weather permitting, of course. The game is at .