Weather History & Data Archive | Weather Underground
...Find historical weather by searching for a city, zip code, or airport code. Include a date for which you would like to see weather history. You can select a range of dates in the results on the ......
https://www.wunderground.com/history/index.html
API Web Service - National Weather Service
...Overview The National Weather Service (NWS) API allows developers access to critical forecasts, alerts, and observations, along with other weather data. The API was designed with a cache-friendly approach that expires content based upon the information life cycle. The API is based upon of JSON-LD to promote machine data discovery. The API is located at: https://api.weather.gov Operational ......
https://www.weather.gov/documentation/services-web-api
FTP/HTTP Services for obtaining Weather Data and Products
...The content bulletins are primarily in English. Text Parsed Data - This is a description of directory and file names used to store a subset of data. A English Descriptive Format naming process is used. It describes the content data types under unique descriptive names. These separate files were generated for internal server use....
https://www.weather.gov/tg/dataprod
Champaign, IL Weather History | Weather Underground
...We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data....
https://www.wunderground.com/history/daily/us/il/champaign/KILCHAMP44/date/2026-5-2
TEMPERATURE GRADIENTS...HEIGHTS AND THICKNESSES
...The 1000 to 500 mb thickness is a function of two properties, (1) the average temperature of the air between 1000 and 500 millibars and (2) the average moisture content of the air between 1000 and 500 millibars. These two properties are combined together to produce the virtual temperature....
https://www.weather.gov/source/zhu/ZHU_Training_Page/Miscellaneous/Heights_Thicknesses/thickness_temperature.htm
Weather Underground
...Skip to Main Content _ Sensor Network Maps & Radar Severe Weather News & Blogs Mobile Apps...
https://www.wunderground.com/history/daily/th/IMUEAN347/date/2026-4-27
Use of File transfer & Web browsers for accessing meteorological data ...
...There is a "help guide" that can aid you in establishing the procedures you should use for retrieving data and forecast products from our file servers using the FTP protocol. This help guide addresses both the standard directory and file name practices used by the Gateway servers listed below and the parsed "individual data and forecast products" processed for our own use. The structure of the ......
https://www.weather.gov/tg/general
Help Guide - National Weather Service
...Files of "WMO bulletins" (note 1) use the Telecommunication Operations Center " File Name Standard " format for storage of meteorological information. There are, therefore, two types of file content formats available on the servers. One is a file of grouped WMO messages available as received from various source communication lines....
https://www.weather.gov/tg/datahelp
Text Parsed Data - National Weather Service
...The content of the international aviation data, U.S. warnings, and all types of hydrometeorological forecasts are stored as transmitted by the source, however, they are parsed into separate specific files using file names of a site ID or warning and forecast area designator or by AWIPS communication identifier....
https://www.weather.gov/tg/engfiles
Disclaimer - National Weather Service
...Before using information obtained from this server special attention should be given to the date & time of the data and products being displayed. This information shall not be modified in content and then presented as official government material. More information about linking to our pages and using NWS data is contained in our Disclaimer....
https://www.weather.gov/disclaimer/