Hello
Your husband is having coughing for 3 weeks every winter and also having low temperature (94 ) , such symptoms may be due to these possibilities , these include:
1 Congestive
obstructive pulmonary disease ( COPD) , as you mentioned that your husband suffer for 3 weeks in every winter , so such low temperature and such winter cough may be due to copd .
Diagnosis can be confirmed by pulmonary function test as well X ray ,and physical examination by a pulmonologist.
2 Congestive
heart failure , as this is also a common cause of such symptoms ,particularly when patient is having long history of cough ( ALLERGIC
BRONCHITIS ).
Diagnosis can be confirmed by ECG and echo.
3 Atherosclerois , hamper in blood supply particularly in peripheral parts like limbs .
Diagnosis can be confirmed by arteriography.
I recommend you please
consult a pulmonologist and get his opinion as cough and low temperature (
hypothermia ) are a cause of concern when the age of patient is 61 years.
Good luck.