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Weather and Climate Access Tools

NCEI provides access to several online tools to access climate data, research, analysis, and error-reporting.

Climate Data 

Climate Data Online (CDO) provides free access to NCEI's archive of global historical weather and climate data in addition to station history information.

Launch CDO

NCEI Data Access

The NCEI Data Access application offers a wide variety of download and subsetting options for a growing collection of environmental data.

Launch Data Access


The GIS-Based Map Interface provides specialized dynamic mapping capabilities for datasets and products archived at NCEI. 

Launch Map Tool

Recent Weather

Use the recent weather tool to access data about past weather conditions. For other weather products, please view our Climate Monitoring page.

Launch Recent Weather

Weather and Climate Toolkit

The Weather and Climate Toolkit provides simple visualization and data export of the weather and climate data archived at NCEI. The Toolkit displays custom data overlays, Web Map Services (WMS), animations, and basic filters.

Launch Toolkit

Calculators and Conversion Tables

Weather and climate data are presented in various meteorological units. To understand and interpret the data, please reference the below tools.

  • Meteorological Calculator
    NOAA's National Weather Service Meteorological Calculator provides calculations and conversions for temperatures, wind chill, relative humidity, wind speed, or heat index.
  • Land Beaufort Scale
    The Land Beaufort Scale is a system for estimating wind speed based on observed conditions on land.
  • Marine Beaufort Scale
    The Marine Beaufort Scale is a system for estimating wind speed based on observed conditions at sea.
  • Snowfall to Meltwater Conversion Table
    The Snowfall to Meltwater Conversion Table is a guide for estimating the water equivalency of newly fallen snow for various temperature ranges.

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