I have previously written that in not so many years time weather station data will perhaps be collected more for fun, a sense of history and for site-specific information, than for serious regional and global climate statistics. In the future it will be data from satellites that is recognised as much more reliable for understanding regional and global temperature trends.
There are two internationally recognised temperature data sets based on satellite measurements known by their acronyms RSS (Remote Sensing Systems) and UAH (University of Alabama in Huntsville ). Both are based on information collected by NASA satellites.
This data does not suggest dramatic global warming. Neither the warming of the late 20th century, nor the cooling since 1998, is of an unusual rate or magnitude.
Chart from meteorologist Anthony Watts and reproduced here with permission.