"climatological averages" refers to the typical weather conditions over a long period of time, usually 30 years. It provides an overall picture of what weather patterns are expected in a certain area or season. Full definition
Smoothed (Jones et al. 1999) daily climatological averages of Tmax and Tmin, for 1961» $» 90 where possible (86 % of stations), were created for each station, and anomalies calculated. (climateaudit.org)
-- For the locations in the contiguous U.S. examined in this study, the past six years (POR 2011 - 2016) have seen average annual temperatures that are 1.2 °F above the current 30 - year climatological average used by NOAA (1981 - 2010). (wunderground.com)
Like the atmospheric river presently taking aim at the West Coast, the nor» easter is gathering over waters that are much warmer than normal — ranging as warm as 9 C above climatological averages in parts of the Gulf Stream off Maine. (robertscribbler.com)