Prevailing winds are from the southeast and south, except in January, when frequent passages of high pressure areas bring invasions of polar air and prevailing northerly winds. Destructive windstorms are fairly infrequent, but both thunder squalls and tropical storms occasionally pass through the area. The average number of days with minimum temperatures of 32 degrees Fahrenheit or lower is about seven per year in the city, and about 15 in outlying areas.
Most freezing temperatures last only a few hours and are usually accompanied by clear skies.
In the city the average date of the first 32 degree temperature is Dec. 11 and the last is Feb. 5. Normal rainfall is about 48.19 in.