New Hampshire Mesonet
Measuring the atmosphere, one station at a time
Real-time weather observations across the Granite State
A growing network of research-grade weather stations across New Hampshire — from the valleys to the 6,288-foot summit of Mount Washington — streaming temperature, wind, humidity, and pressure in real time across the state.
The Network at a Glance
Live conditions across the Granite State
Every station on the network, mapped on the terrain it measures. Select a marker to read current temperature, wind, humidity, and pressure — refreshed continuously.
Live From the Network
Current conditions, station by station
Real-time observations pulled straight from every reporting station — temperature, humidity, wind, and pressure, from the valley floor to treeline.
Explore the Network
Data, stations, and documentation
Open access to the full network — browse stations, pull live and archived observations, and build on top of the Mesonet through a documented API.
Stations
Browse every site in the network with location, elevation, and the instruments each one carries.
Browse stations → Real-timeLive Data
Current observations from across the state, updated continuously from each reporting station.
View live data → BuildAPI Reference
Programmatic access to current and historical observations for your own apps and research.
Read the API docs → ReferenceDocumentation
How the network works, data formats, conventions, and everything needed to get started.
Open the docs → DefinitionsVariable Glossary
Plain-language definitions and units for every meteorological variable the network records.
See the glossary → HistoryData Archive
Dig into the historical record — download past observations for analysis and long-term study.
Explore the archive →A Program of Mount Washington Observatory
Granite State data, from the Home of the World’s Worst Weather
The New Hampshire Mesonet is operated by Mount Washington Observatory — a nonprofit research institution advancing understanding of Earth’s weather and climate since 1932. The Mesonet extends that mission across the state, building an open, high-resolution picture of New Hampshire’s atmosphere.
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