In July, typical afternoon highs at Boston Common run around 85°F (hot). Mid-afternoon sun stands about 56° high, and the sun is up from 5:20 AM to 8:19 PM. Tree cover gives real shade options, and the open lawns are the hot spots.
See live sun & real shadows here →| January | 33°F |
| February | 35°F |
| March | 50°F |
| April | 59°F |
| May | 66°F |
| June | 78°F |
| July | 85°F |
| August | 80°F |
| September | 74°F |
| October | 62°F |
| November | 49°F |
| December | 37°F |
Tree cover gives real shade options, and the open lawns are the hot spots. See real building shadows over satellite imagery for any time of day: https://isthereshade.com/?anywhere&at=42.355,-71.06556
Around 8:19 PM local time in mid-July (it shifts through the year). Sunrise is about 5:20 AM.
Boston Common · Boston, MA. Data: exact sun position; climate normals from historical weather; live forecast on the interactive view.
Boston Common is a real park, and that changes the shade question entirely. The oldest public park in the country mixes broad open lawns with tree-lined paths and shaded corners, so unlike a bare plaza or a bridge, it gives you actual choices about how much sun to take on. The lawns bake in the afternoon; the tree canopy along the walks is where people spread out on a hot day.
Boston's summers are warm but not extreme. July afternoon highs average about 85°F, the peak of the year, with August near 80°F and June around 78°F. That is comfortable-to-warm rather than dangerous, and the tree cover across much of the Common makes even the hottest afternoons manageable if you pick your spot.
In July the sun rises around 5:20 AM and sets near 8:19 PM, a long day of light in the city. Mornings are cool and quiet, good for a walk across the paths before downtown fills up. At 3 PM the sun sits about 56 degrees up, off to the west-southwest, so the open lawns are in full afternoon sun while the tree-lined edges stay comfortably shaded.
Late afternoon into evening is the Common at its most pleasant in summer. The surrounding buildings and the park's own trees throw long shadows across more of the ground as the sun drops toward the west, and the temperature slides off its afternoon high. If you want the open lawns without the strongest sun, the last few hours before the 8:19 PM sunset are ideal.
The trade here is the classic park one: open lawn for sun, tree line for shade. The wide grass fields are the hot spots at midday, fully exposed and reflecting the light back. The tree-covered paths and the benches under the canopy are where the shade is real and reliable, and they stay noticeably cooler on a warm afternoon. The buildings ringing the park add more shade along the edges, sliding east and north as the sun swings west through the afternoon.
To see how the trees and surrounding buildings cast shade across the park at the hour you plan to visit, the satellite shadow view maps the footprint for your date and time.
At 85°F, Boston Common does not demand a heat plan, just light sun sense. Sunscreen and a hat make the open lawns comfortable, water is easy to keep on hand, and the shaded paths are always a few steps away when you want out of the sun. If you are settling in for a while on a hot afternoon, claim a spot under the canopy rather than out on the open grass.
The park is comfortable across the seasons. Spring and fall afternoons in the 50s and 60s make every part of it pleasant at any hour, and even in high summer the city's coastal position and the Common's own trees keep it friendlier than the temperature alone suggests. Chase the tree line when the sun is high, and take the open lawns when the light softens.