Hormones are chemical messengers released from endocrine glands that travel through the blood system to influence the nervous system to regulate behaviors such as aggression, mating, and parenting of individuals. 1  Aggression. 2  Hormones. 3  Parental behaviors. 4  Sex differences. 5  Sexual behavior. 6  Steroids.
San Francisco International Airport Weather Today (1â3 days) Mostly dry. Very mild (max 17Â°C on Tue morning, min 9Â°C on Tue night). Wind will be generally light. San Francisco International Airport Weather (4â7 days) Mostly dry. Very mild (max 19Â°C on Fri afternoon, min 12Â°C on Thu night). Wind will be generally light. 10 Day San Francisco International Airport Weather (7â10 days) Mostly dry. Very mild (max 20Â°C on Tue afternoon, min 13Â°C on Sun night). Wind will be generally light.
Annual Weather Averages Near San Francisco. Averages are for San Francisco International Airport, which is 11 miles from San Francisco. All Year Climate & Weather Averages in San Francisco. January Climate & Weather Averages in San Francisco.