Looks like it only got to 38 last night (or now) so no frost, but I just saw this

Frost Advisory for Houston, GA

from 4 am EDT, Tue., Oct. 20, 2009 until 9 am EDT, Tue., Oct. 20, 2009

Local Temperature

Updated 19 Oct 2009 6:05 am Local Time

Issued by The National Weather Service

Atlanta, GA

4:48 am EDT, Mon., Oct. 19, 2009

... FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM EDT TUESDAY...

AN UNSEASONABLY COLD CANADIAN AIR MASS WAS SETTLING ACROSS THE SOUTHEAST U.S. EARLY THIS MORNING. THIS HIGH PRESSURE SYSTEM WILL ONLY DRIFT VERY SLOWLY EAST THROUGH WEDNESDAY... WHILE MODIFYING. MINIMUM TEMPERATURES OF 33 TO 36 DEGREES ARE EXPECTED TUESDAY MORNING... SUPPORTING WIDESPREAD FROST... EXCEPT FOR PATCHY FROST IN MORE POPULATED URBAN AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.