NOAA’s National Climatic Data Center http://www.ncdc.noaa.gov/sotc/global/201313 https://www.ncdc.noaa.gov/sotc... https://www.ncdc.noaa.gov/sotc... 1.7°F http://www.ncdc.noaa.gov/sotc/global/201313 https://www.ncdc.noaa.gov/sotc...