Live
New Hampshire barometric pressure today
Right now the highest pressure in New Hampshire is Nashua, 29.67 inHg (1005 hPa) and the lowest is Portsmouth, 29.61 inHg (1003 hPa). Values are sea-level pressure from 5 airport weather stations.
| City | Station | inHg | 3 h |
|---|---|---|---|
| Manchester, New Hampshire | KMHT | 29.63 | ↘ -0.6 |
| Nashua, New Hampshire | KASH | 29.67 | ↗ +0.3 |
| Concord, New Hampshire | KCON | 29.64 | ↘ -0.3 |
| Portsmouth, New Hampshire | KPSM | 29.61 | ↘ -0.3 |
| Lebanon, New Hampshire | KLEB | 29.64 | ↘ -0.7 |
Elevation and pressure across New Hampshire
The cities here run from about 20 ft in Portsmouth to 584 ft in Lebanon. On a standard day that means about 29.90 inHg of actual air pressure in Portsmouth and 29.30 inHg in Lebanon. The readings above are corrected to sea level, so any difference between stations comes from the weather, not the height.
Highest point in New Hampshire · Sea-level vs station pressure · High vs low pressure
Frequently asked questions
What is the barometric pressure in New Hampshire today?
The live map and station board on this page show sea-level pressure at 5 weather stations across New Hampshire, including Manchester and Nashua. Each reading is the latest airport report, checked about every 10 minutes.
Why does a barometer in Lebanon read lower than one in Portsmouth?
Elevation. Lebanon sits at about 584 ft and Portsmouth at about 20 ft, a gap worth roughly 0.60 inHg of actual air pressure on a standard day. Forecasts correct for that, so the sea-level values here can be compared directly.
Is the pressure rising or falling in New Hampshire?
The last column of the station board shows the change over the last three hours, in hPa, for each station. Falling numbers usually mean clouds and rain are on the way; rising numbers mean clearing.