Fiddling with historical temperature records achieves no more than fiddling with historical cloud cover observations, and who would bother? (judithcurry.com)
Pounds now reported that Monteverde's 25 year historical temperature record revealed an approximate 2 °F decline in maximum temperature along with an approximate 2 °F rise in minimums. (landscapesandcycles.net)
Balling, R. C., Jr (1998) Impacts of land degradation on historical temperature records from the Sonoran Desert. (landscapesandcycles.net)