You are here API - Developers provides weather information with focus on historical weather tracking. Information is currently available from 53 years ago with access to over 1.9 million datapoints. A hourly historical weather forecast is available as well. All of the information comes from government vetted sources of information and has been closely scrutinized for accuracy. The Server-based API (also Javascript available) allows you to place GET calls for multiple locations based on latitude or longitude, city name, country name, US zip code, dates and various types of weather conditions (precipitation). XML formatting is available, but JSON is the default