Historical Data
Explore the past, analyze trends
Access years of observation data from the network. Download station records, analyze seasonal patterns, and study long-term climate trends across New Hampshire.
Data Access
Choose your approach
Whether you’re looking for a specific station’s history or analyzing the entire network, we have multiple ways to access archived data.
Data Downloads
Download CSV files of historical observations by station and date range for your own analysis and research.
Browse downloads API AccessArchive API
Programmatic access to historical data via API. Query specific date ranges and stations for automated workflows.
View API docs Query BuilderAdvanced Query
Build custom queries to extract exactly the observations and variables you need. No coding required.
Try the query tool AnalysisSummary Statistics
Pre-calculated monthly and seasonal summaries for quick insights into temperature, wind, and precipitation trends.
Explore trendsAbout the Archive
What data do we have?
The archive contains all observations recorded by network stations since the Mesonet’s inception. Data includes temperature, humidity, wind speed and direction, barometric pressure, solar radiation, and precipitation where available. All data is quality-controlled and available in multiple formats.
Coverage
19 stations statewide from 162 ft to 6,288 ft elevation
Resolution
1-minute interval observations, daily/monthly summaries available
Formats
CSV, JSON, NetCDF for scientific analysis