Using long - term data from the U.S Historical Climatology Network (USHCN) and
preliminary data from the Climate Division Database, the U.S. nationally
averaged temperature during October was 56.9 °F (13.8 °C) which was 2.1 °F (1.2 °C) above the 1901 - 2000 long - term mean, tied for 9th warmest on record.
Preliminary runs show that the new mean annual cycle will be about 0.1 C warmer each month for the global
averages, meaning all monthly anomalies will appear to decrease by about 0.1 when the new 30 - year base period is
used (see below).