One more cool night, then warmer temps and rain by the weekend

Atlanta's official low at Hartsfield-Jackson International Airport was 50 degrees Wednesday, but the mercury dipped into the 40s at most other reporting sites. Peachtree City recorded a low of 46 degrees, and it was 48 in Marietta, Chamblee and Cartersville, the National Weather Service said.

Atlanta's low Wednesday was the coolest since a 50-degree reading on May 19. Normal low for the last day of September is 60 degrees, according to the Weather Service.

Temperatures could be a few degrees cooler tonight, bottoming out in the the mid-40s across metro Atlanta, forecasters said.

Sunny skies are forecast through Thursday, with afternoon highs in the low 70s on Wednesday, warming to the upper 70s on Thursday. Normal high is 78.

Skies will become mostly cloudy Thursday night, when lows are expected to be in the mid-50s.

A 40 percent chance of showers and thunderstorms is predicted for Friday, increasing to 50 percent Friday night before dropping back to 20 percent on Saturday. Highs will be in the upper 70s on Friday and mid-70s Saturday, with lows Friday night in the upper 50s.

The rain should end by Saturday night, and be replaced by cooler weather, with lows expected to again be in the upper 40s.

Sunday will be mostly sunny, with highs in the mid-70s, the Weather Service said.

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