Most temperature data was already available, but critics of climate science want everything public. Following the latest release, raw data from virtually all of the world's 5,000-plus weather stations is freely available.
Release of this dataset required The Met Office to secure approval from more than 1,500 weather stations around the world. The article notes that while Trinidad and Tobago refused permission but the Information Commissioner ruled that public interest in disclosure outweighed those considerations."
Link to Original Source