You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Philadelphia

Context:
The January daily average is 33.0 °F (0.6 °C), though, in a normal winter, the temperature frequently rises to 50 °F (10 °C) during thaws and dips to 10 °F (−12 °C) for 2 or 3 nights. July averages 78.1 °F (25.6 °C), although heat waves accompanied by high humidity and heat indices are frequent; highs reach or exceed 90 °F (32 °C) on 27 days of the year. The average window for freezing temperatures is November 6 thru April 2, allowing a growing season of 217 days. Early fall and late winter are generally dry; February's average of 2.64 inches (67 mm) makes it the area's driest month. The dewpoint in the summer averages between 59.1 °F (15 °C) to 64.5 °F (18 °C).

Question:
What is the average time for freezing temps?

November 6 thru April 2