The Indianapolis Airport received 0.40 inches of rainfall Wednesday afternoon (July 18) bringing a close to the driest start to July ever and one of the longest dry spells of record. Total rainfall at the airport for the 47-day period from June 1-July 17 was a meager 0.09 inches. The previous record for 0.09 inches for a 45-day occurred from August 13-September 26, 1908. July 2012 holds the record for the driest start to July with no measurable rainfall through July 17 eclipsing July 1901 by one day.
As a result of the extreme drought conditions, the historic heat wave that began on June 27, reached a significant milestone. The year 2012 set the average MAXIMUM temperature record for any 22-day period with a high temperature of 99 degrees. The average MAXIMUM temperature for the 22-day period was 97.5 degrees exceeding July 1936 by 8 tenths of a degree.
The year 2012 still remains the warmest year ever to date and will remain the front runner for the number of 90-degree days to date in a year. The total of 90-degree days through July 18 was 32. The record number of 90-degree days for a month is 25 set in July 1901. It is possible that July 2012 could eclipse this mark. The total through July 18 was 17.
It has remained quite warm at night for an extended period as well. Indianapolis experienced 22 consecutive days with lows of 70 degrees or warmer through July 19. This broke the previous record of 20 consecutive days set from June 26-July 15, 1921.