In Chinese Medicine, Autumn is characterized by the external decline of nature and in many climates, by drying and cooling.  The natural movement pattern of autumn is directed inward and the energies of the body gather on the inside.  

Recommended foods at this time are energetically warm foods that compensate for the onset of cold :
Oats, millet, corn, rice, carrots, leeks, radishes, cauliflower, beef, lamb.
For inner cold, shivering and the beginning of a cold, foods such as:
Garlic, cinnamon, chilli, ginger and onions stimulate blood circulation and rapidly bring defensive energy to the surface.  
If dryness predominates, foods such as:
Pear, tofu and peanuts should be utilized

Foods to Avoid:
Fatty, oily foods and cool or cold dairy products which burden the spleen and cause dampness and phlegm disorders (bronchitis, sinusitis) especially during wet weather.