If you require accurate real-time world weather data for your application, the weatherstack is worth considering. The weatherstack API provides historical weather data back to 2008 and measurement units for metric, scientific or English. This article provides an introduction to the API.
Do you use or plan to use a weather API in the near future? If so, Earth Networks would love to hear your thoughts on the landscape of Weather APIs on the market. Your feedback may help guide improvements in weather APIs and every survey respondent willl get a chance to win an Amazon gift card.