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California's September temperatures highest in 25 years, weather experts say [Updated]

October 9, 2009 | 11:09 am

This year, California tied its warmest temperature record for the month of September in 25 years, while above-average temperatures were registered in the West and across the entire nation for the month, according to federal weather officials.

The average California temperature for September was 73.3 degrees, matching the same level of warmth experienced in September 1984, said officials at the National Oceanic and Atmospheric Administration.

The 73.3-degree reading is the highest average temperature reading for the month of September in the 115 years that the National Climatic Data Center has been keeping records, officials said.

Jim Ashby, a climatologist at the Western Regional Climate Center in Reno, said it was difficult to identify any particular pattern associated with California’s warm September temperatures.

But “October 1984 was extremely cool ... and that’s the way this October has started off, cool,” Ashby said.

Nationally, the average September temperature of 66.4 degrees was one degree above the average in the 20th century, according to the agency’s data. Precipitation across the contiguous United States in September averaged 2.48 inches, which was exactly the average between the years 1901 and 2000.

[Updated at 11:10 a.m.: Regionally, the West experienced its warmest September on record. Nevada, for example, registered an average of 66 degrees.]

-- Ann M. Simmons

Photo: The dog days of summer aren't over for Doodles and owner Judy Miller on a sunny afternoon in September at Seal Beach. Credit: Allen J. Schaben / Los Angeles Times

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