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Atlanta has a humid subtropical climate, (Cfa) according to the Köppen classification,with hot, humid summers and mild winters that are occasionally cold by the standards of the southern United States. January averages 42.7 °F (5.9 °C), with temperatures in the suburbs slightly cooler. Warm, maritime air can bring springlike highs while strong Arctic air masses can push lows into the teens (−11 to −7 °C). High temperatures in July average 89 °F (31.7 °C) but occasionally exceed 100 °F (38 °C). Atlanta's high mean elevation distinguishes it from most other southern and eastern cities, and contributes to a more temperate climate than is found in areas farther south.

Typical of the southeastern U.S., Atlanta receives abundant rainfall, which is relatively evenly distributed throughout the year, though spring and early fall are markedly drier. Average annual rainfall is 50.2 inches (1,280 mm). Temperatures at or above 90 °F (32 °C) occur more than 40 days per year; overnight freezing can be expected over 45 days, but high temperatures that do not climb above the freezing mark are rare.Snow is not seen every year and averages 2.5 inches (6.4 cm) annually. The heaviest single storm brought around 10 inches (25 cm) on January 23, 1940. True blizzards are rare but possible; one hit in March 1993.Ice storms usually cause more trouble than does snowfall; the most severe such storm may have occurred on January 7, 1973. In 2010, Atlanta had its first white Christmas since 1882.

Extremes range from −9 °F (−23 °C) in February 1899 to 105 °F (41 °C) in July 1980. More recently, a low one degree away from the record, was observed on January 21, 1985.

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14y ago

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