The first twelve days of 2010 in Indianapolis rank as the 14th coldest start to January on record in terms of daily average temperature. The coldest temperature seen during the 12 day period was 1 degree on January 3. The warmest temperature recorded during the period was 31 degrees on January 12. The last time the first 12 days of January averaged colder was in 1999. The last time we had at least 12 consecutive days below 32 degrees was in 2007.
In terms of high temperature only, the first 12 days of January rank as the 9th coldest start of the month.
The picture above is a visible satellite picture taken on the morning of January 13. Indiana is cloud free, so the snow cover is visible. In the picture, clouds are across parts of lower Michigan and eastern Ohio.
The temperature surged above 32 degrees in Indianapolis on January 13 for the first time since December 31, as most of central Indiana rose into the middle and upper 30s. This marks the end to the longest streak of continuous subfreezing temperatures in almost three years. That streak lasted 15 consecutive days, from January 28-February 11, 2007. The longest streak of consecutive subfreezing temperatures in Indianapolis began on December 29, 1976 and continued until February 2, 1977, a total of 36 days.