July is typically the hottest month of the year in Massachusetts, with the average high temperatures in the 75°F (23.9°C) to 85°F (29.4°C) range. Temperatures touch 95°F (35°C) in places like Amherst and Lowell in the central region, while the Atlantic Ocean keeps the conditions relatively cooler in Hyannis, Cape Cod, and Nantucket. The clocks are set faster by an hour from early spring to late fall to take advantage of the increased sunshine that records 301 hours. The long days see the time of sunset extend to 9 pm. Always keep the thought of rain in mind while going out in Massachusetts. The ocean temperatures are warm in the 65°F (18.3°C) to 75°F (23.9°C), but swimming is pleasant both in the sea and the lakes. The considerable variation in temperatures in the year mandates an air conditioner during the summer when the nights are uncomfortable due to high humidity. Massachusetts registers high tourist numbers at the peak of the summer in July.