Both lactose intolerance and milk allergies can have the same symptoms, but milk allergy involves the immune system whereas lactose intolerance involves the digestive system, Kidshealth.org says.
Guide to California weather in December. The average maximum daytime temperature in California in December is a comfortable 20Â°C (68Â°F). The average night-time temperature is usually a cool 8Â°C (46Â°F). There are usually 7 hours of bright sunshine each day, which represents 69% of the 10 hours of daylight.
December San Francisco. Weather Lowdown. December is winter and the rainy season in San Francisco, USA. This time of year brings gradually falling day time temperatures and an average temperature of 100C. The average high and low temperatures vary from a low of 80C to a day time high of 130C.