Even if you are leaving two days before the race, the forecast can change. Because the race occurs in mid-April, it’s subject to unpredictable weather swings and can range from near freezing to sweltering hot.
For example, in 2018 the forecast was calling for mild temperatures with occasional showers and some wind on Friday. By Saturday, the wind had picked up. By Sunday the amount of rain in the forecast had doubled or tripled and suddenly runners were looking at a deluge instead of a run in some light rain. Runners scrambled to buy jackets, gloves, ponchos, extra socks, and more.
Thankfully there are no shortage of places to buy running gear in Boston. So if the forecast does change, you will have options. However, it’s best to come prepared with your favorite sunglasses, hat, poncho, shorts, tights, gloves, sunscreen, and whatever else the weather might call for.
A final note on the weather. The weather can change quite a bit throughout the race, particularly since the start line is 26.2 miles away from the finish line. As you check the forecast in the week leading up to the race, be sure to check Hopkinton, Newton, and Boston during the times when you will be there.