July was cold, but no record

Month ranked 2nd coolest, with temps 5 degrees below normal.

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By Margo Rutledge Kissell, Staff Writer Updated 10:53 PM Friday, July 31, 2009

This month will go down as the second coolest July on record in the Dayton area, according to the National Weather Service in Wilmington.

“That’s fairly significant. We haven’t had a July that’s been this cool since 1984. It’s been a quarter of a century,” meteorologist Mike Ryan said on Friday, July 31.

The record average temperature stands at 69.2 degrees back in 1947.

“We are currently sitting at 69.5, which puts us into solid second position,” Ryan said in the late morning.

The third coolest July on record came in 1984, when the average temperature was 69.9 degrees.

The average July temperature is 74.3 degrees, so this month has been about five degrees below normal.

Ryan said he expects the general trend for August temperatures to be near or slightly below normal, putting them more in the low to mid-80s.

“I do not see any extended period of hot dry weather at this point,” he said.

He attributes the cooler weather this summer to a persistent trough of low pressure over the eastern part of the United States.

Although this has been a wet month, it’s nowhere near the record July rainfall of 8.55 inches in July 1990. That year ranks as the wettest year on record, Ryan noted.

This month saw about 4.01 inches of rainfall, including 0.78 measured at Dayton International Airport early Friday morning. The average monthly precipitation is 3.74 inches.

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