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Boston Weather: 29.0°F | Partly Cloudy

Weather: Perpetual Spring

By Robert Lindsay Korty
STAFF METEOROLOGIST -- About fifty million years ago, Earth’s climate started to cool. Through the Cretaceous period and into the early Cenozoic era, which began with the extinction of the dinosaurs sixty-five million years ago, palms grew across what is now the United States and forests populated the Arctic coast. There were crocodiles, turtles, lotus, and strange plants and animals inhabiting locations north of the Arctic Circle that are presently inhospitable. This weekend, like most over the past fifty million years, will not be as warm.

But first there is today: sunshine, May flowers, and warm temperatures will make today an enviable one. Cooler air across eastern Canada will slide south Saturday morning, leaving the weekend with a mixture of clouds and sun, but about 15-20°F (8-10°C) cooler than today.

Extended Forecast

Today: Sunny and mild. High 74-79°F (23-26°C).

Tonight: Mostly clear. Low of 45°F (7°C).

Saturday: Mostly cloudy and cooler; isolated shower possible. High 60°F (16°C).

Sunday: Mostly sunny. High 59°F (15°C); low 45°F (7°C).