Barometric Pressure Forecast for Keene, New Hampshire
Barometric pressure forecast for Keene, New Hampshire — in the Ashuelot valley below Mount Monadnock, a bowl of low ground famous for pooling cold air on clear nights. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Keene
Keene lies in a flat-bottomed basin in the Ashuelot River valley in southwestern New Hampshire, ringed by hills with Mount Monadnock standing to the east. The basin shape gives the town a genuine microclimate: on clear, calm nights cold air drains off the surrounding slopes and settles on the valley floor, so overnight minima here routinely run well below those of nearby higher ground, and radiation fog is common in the autumn. For barometric pressure, the driver is the same storm track that governs all of southern New England. Nor'easters passing to the southeast produce the largest and fastest falls, and Keene's inland position and elevation usually put it firmly on the snow side of the rain-snow boundary that so often cuts across eastern Massachusetts. Behind each departing low, arctic high pressure builds in from Canada with a steep rise in current barometric pressure and a hard temperature drop. The valley is also prone to freezing rain when cold air lingers at the surface beneath warmer air aloft, a hazard the topography actively encourages. Summer thunderstorms roll off the Green Mountains to the west with brief outflow pressure jumps. A barometric pressure forecast for Keene is most valuable from December through March.
What this means for you
Can barometric pressure cause headaches? In the Monadnock region the winter storm cycle is pronounced, with deep falls ahead of a nor'easter followed by steep arctic recoveries, and weather-sensitive people frequently report reacting to both ends of that swing. Use the barometric pressure forecast in Pressure Pal as a headache tracking app, watch the rate of change rather than the reading, and check pressure change today during the winter storm season.