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Boston Weather: 33.0°F | Fair
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Sun, Sun, Sun

High pressure builds into the area today, providing light winds and a sunny sky and letting meteorologists let down their guard for a few days. Light winds and a lack of clouds is a win-win combination for winter cold at night, since these are the circumstances that allow the ground to radiate heat efficiently to space once the sun goes down.

At this time of year, the ocean is warmer than the air at night, providing a heat source for those located near the coast. Those living in or near the city of Boston also experience the urban heat island effect. Cities are built from materials that are better at absorbing heat during the day than the land in surrounding areas. At night, the city radiates this heat, which may keep the temperature in the city several degrees above the countryside well after sunset.

High temperatures for the week will be in the 50s°F with lows around 40°F. The chance of rain returns again this weekend.

Extended Forecast

Today: Sunny. High 50°F (10°C). Northeast winds 5–10 mph.

Tonight: Clear. Low 39°F (4°C).

Tomorrow: Sunny. High 55°F (13°C). North winds at 5 mph shifting to south in the afternoon.

Thursday: Clear. Low 42°F (6°C).

Friday: Mostly cloudy with a chance of rain. High 59°F (15°C).