Here are the average sunshine hours per day. The amount of sunshine is lower than that of New York and the east coast. On average, there are around 2,020 sunshine hours per year. However, there are also stable and pleasant periods. Spring and autumn, from mid-March to May and from September to mid-November, are contrasted seasons, with fairly frequent rains and sudden changes in temperature. Typically, the temperature reaches 33/35 ☌ (91/95 ☏) on the hottest days of the year, although the record is 39 ☌ (102 ☏), recorded in July 1988. However, there can sometimes be very hot periods, usually of short duration. The summer in Pittsburgh is not as hot and humid as on the east coast or in the south of the United States, also due to the altitude, which slightly lowers the temperature compared to sea level. Summer, from June to August, is hot and quite sunny, although thunderstorms can sometimes break out. In colder periods, rivers can also freeze. The record cold, -30 ☌ (-22 ☏), occurred in January 1994. In return, cold waves are more intense, in fact, the temperature drops below 0 degrees Fahrenheit (-18 ☌) almost every year. However, the snowstorms that hit the east coast of the United States typically do not occur here. The heaviest snowfall in one day occurred on March 13, 1993, when 60 cm (23.5 in) of snow fell. On average, 110 centimeters (44 inches) of snow fall per year. Snowfalls are frequent, and at times can be abundant. Winter, from late November to early March, is very cold.
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