And between April 1889 and October 1925, there wasn't a single warmer-than-average month.<p>ftp://ftp.ncdc.noaa.gov/pub/data/anomalies/monthly.land_ocean.90S.90N.df_1901-2000mean.dat<p>An interesting anomaly is the warming between the 1860s and 1940s. Especially given the comparatively slight amount of CO2 released in those decades compared to our own.<p>Temperature norms may move across greater timescales than just 100-150 years. Of course, if we were to explore that, the discussion goes off the rails into talk about the "MWP," "historical reconstructions," "Mann, et al.," and other murkily useless topics for internet bulletin boards.