This is an article from Tony Heller's "Real Science" blog. His historical research shows that meteorological data is being adjusted to match theory. The adjustments are not only to the current data, where readings are fabricated to create data for weather stations that are not reporting or that do not exist, but also to historical data, supposedly to correct for inaccuracies in readings of the past 130 years.

There is no scientific basis for corrections to historical data, because the work that was done in the past included discussions of methods for proper measurement and examination of the accuracy obtained.