The atmospheric fire hose that has brought downpours and flash flooding to parts of the East since the end of June will push farther inland by Independence Day. While the risk of showers and thunderstorms will lessen for the celebration in Boston, high heat and humidity will be factors during the day.
High temperatures have hovered in the 80s since the end of June, but a southwest wind will pump in even hotter weather for the celebration commemorating the adoption of the Declaration of Independence.
The tropical moisture that has been streaming northward from the Caribbean Sea and the Gulf of Mexico will push westward as high pressure off the East Coast begins to strengthen and move inland.
This will allow the wet weather across southeastern New England to clear out for most of the day on Thursday, but a stray shower or thunderstorm cannot be ruled out in the afternoon or evening. While these storms will not occur everywhere, if a storm were to affect the area around the Hatch Shell and the Esplanade, the storm would be brief.
As the celebration begins on the banks of the Charles River in the morning, the temperature will start to climb toward 90 degrees, nearly 10 degrees above the average high for this time of year. It will also be humid throughout the day which will lead to AccuWeather.com RealFeel® temperatures approaching the century mark in the afternoon.
A breeze should provide some relief for patrons during the day, though visitors should still remember to drink plenty of water and remain in the shade as much as possible if they are going to be outside for an extended period of time.
When the Boston Pops concert begins at 7:30 p.m., it will still be warm and humid with temperatures in the lower to middle 80s. The risk for any storms should be over by this time.
Warm and muggy weather will continue through the Boston Pops Fireworks Spectacular which begins at 9:30 p.m. There will be a light breeze during the evening which should help to clear the smoke from the fireworks for better viewing. Temperatures will remain in the 80s through the end of the fireworks at 10:00 p.m., so a jacket will not be needed for the grand finale over the river.