Climate
Louisville is located on the northern limit of the humid subtropical climate. Summers are typically hot and humid with mildly warm evenings. The mean annual temperature is 56 °F (13 °C), with an average annual snowfall of 16.4 inches (41 cm) and an average annual rainfall of 44.53 inches (1131 mm). The wettest seasons are the spring and summer, although rainfall is fairly constant all year round. During the winter, particularly in January and February, several days of snow can be expected, allowing for winter sports. January is the coldest month with average highs of 41 °F and average lows of 25 °F (5 to −4 °C) and July the hottest month with average high and low temperatures from 87 to 69.8 °F (31 and 21 °C). The highest recorded temperature was 105 °F (41 °C) on July 14, 1954, and the lowest recorded temperature was −22 °F (−30 °C) on January 19, 1994. However, in any season, temperatures can vary widely day by day, because of Louisville's location where many fronts often converge. Severe weather is not uncommon; the area is prone to almost all types of non-tropical weather extremes, including tornadoes, severe thunderstorms, ice storms and extreme heat and cold.
Much like the San Fernando Valley in Los Angeles, Louisville's Ohio River Valley location traps air pollution. The city is ranked by Environmental Defense as America's 38th worst city for air quality. Louisville also often exemplifies the heat island effect. Temperatures in commercial areas and in the industrialized areas along interstates are often higher than in the suburbs, particularly the shaded areas, like Anchorage, where temperatures are often five degrees Fahrenheit (3 °C) cooler.
(Source: Wikipedia.org)
