Phoenix has driest monsoon season since record-keeping began in 1895

Monsoon season usually brings summer thunderstorms for about three months each year starting in June

After a summer of extreme heat, Arizona's most populous city is in the record books again. This time Phoenix is notching a record for dry heat.

The National Weather Service said Sunday that the monsoon season this year in the arid south-west dropped only 0.15 inches (.38 centimeters) of rainfall from 15 June to 30 September. That's the driest since the agency began keeping records in 1895. The previous mark was 0.35 inches in 1924.