Los Angeles is said not to have seasons. While this is not entirely true, the influence of the Pacific Ocean plus the mountains flanking the city make the weather moderate. The temperature in winter is between about 45 and 66 degrees Fahrenheit (7 and 18 degrees Celsius) and in the summer, the temperature rises to between 63 and 76 degrees Fahrenheit (16 and 24 degrees Celsius). There is a rainy season in Los Angeles between November and March. Those with asthma or other respiratory ailments should be especially careful in summer, since Los Angeles's smog is at its worst in the summer months.