noun (n)

• the prevailing context that influences the performance or the outcome of a process(noun.state)

  Example:
  There were wide variations in the conditions of observation.
  

  source: wordnet30
• the set of circumstances that affect someone's welfare(noun.state)

  Example:
  Hazardous working conditions.
  Harsh living conditions.
  

  source: wordnet30
• the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation(noun.phenomenon)

  Example:
  Every day we have weather conditions and yesterday was no exception.
  The conditions were too rainy for playing in the snow.
  

  Synonym:
  atmospheric condition, weather, weather condition
  

  source: wordnet30