text: Average temperature anomalies for January to October 2015 from the HadCRUT.4.4.0.0 data set. Crosses (+) indicate temperatures that exceed the 90th percentile, signifying unusual warmth, and dashes (-) indicate temperatures below the 10th percentile, indicating unusually cold conditions. Large crosses and large dashes indicate temperatures outside the range of the 2nd to 98th percentiles. Source: Met Office Hadley Centre, via WMO.