<p>The average high in Boston in April is 56 degrees F, and the average low is 41. So on an average day, you'd be totally fine with a light jacket. Of course, you might want to bring a sweatshirt -- or piece of rain apparel -- just to be on the safe side.</p>
<p>At the risk of jinxing everything, I will say that CPW is almost always a really nice weekend. People joke about MIT breaking out the CPW weather machine to make nice sunny days for the prefrosh. :)</p>