You can get much of the raw data from a web site in the US (NCDC Asheville) if you know what you're doing. This isn't an issue for almost all climate scientists around the world. They are happy with the products we put together. We've started getting requests from people in the last few years asking for the raw station data. We've always not made the raw data available.
Science : UHI And El Nino Caused by CO2
2 hours ago