Barometric Pressure Forecast for Needham, Massachusetts
Barometric pressure forecast for Needham, Massachusetts — inside the Route 128 arc west of Boston, on a bend of the Charles River between Newton and Dover. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Needham
Needham sits at roughly 150 feet on gently rolling ground where the Charles River loops around the town on three sides, about twelve miles inland from Boston Harbour. That dozen miles matters more than it sounds. Nor'easters are the defining barometric event of the Massachusetts year, producing falls of twenty-five to forty hPa over eighteen to thirty-six hours between December and March, and in a marginal storm Needham commonly sits on the snow side of the rain-snow line while the harbour and the South Shore get rain from the same low. The pressure signature is identical in both places; the weather that comes with it is not. The recovery behind a departing nor'easter is often steeper than the fall, as Arctic high pressure builds in from the northwest and the reading climbs hard for a day. In spring the region gets back-door cold fronts, which arrive from the northeast rather than the west and drop the temperature twenty degrees in an afternoon with only a small barometric signature. Summer brings the sea breeze, which on a hot day can push inland as far as here by mid-afternoon and stall as a shallow boundary. Hurricane remnants reach New England every few years and deliver a deep, fast minimum.
What this means for you
Winter coastal storms give long pressure excursions that can run three days from fall to full recovery. Tracking current barometric pressure across the whole arc shows whether your attacks follow the fall or the rebound.