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Boston Weather: 44.0°F | Mostly Cloudy


Chilly Today, Warmer by Sunday

By Angela Zalucha

Cold air brought by the front that moved through our area Wednesday night will remain in place today and tonight, with a gradual warming trend through Sunday. Tonight temperatures will dip into the 20’s F, making it the coldest night so far this season. Boston’s coastal location will keep us warmer than places farther inland, which could see lows in the teens. This is because the ocean cools more slowly than the air or land, owing to the relatively large specific heat of water. As the air cools below the ocean temperature (right now about 55 F at the surface), the ocean acts as a heat reservoir, which can help keep nearby land a few degrees warmer (but I wouldn’t break out your shorts or anything). Look for the high on Sunday to be around the normal 51 degrees Fahrenheit.

High pressure that moves across the region will keep dry air in place, except for a few clouds here and there. The dry air of winter makes it a good time for stargazing, so if you get a chance this evening, look up. At dusk you’ll see Venus near the horizon in the southern sky; later on in the evening you’ll find Mars. The full moon will rise at sunset and be up throughout the night.

Extended Forecast

Today: Mostly sunny. High 43 F (6 C).

Tonight: Mostly clear. Low 28 F (-2 C).

Tomorrow: Partly sunny. High 45 F (7 C).

Tomorrow night: Partly cloudy. Low 35 F (2 C).

Sunday: Partly sunny and warmer. High 52 F (11 C).

Sunday night: Partly cloudy. Low 40 F (4 C).

Monday: Partly cloudy with a chance of rain. High 51 F (11 C).