Outdoor games should not be limited because of the weather. The Norwegians are well aware of this fact because they spend each day in a climate that is much less amenable than ours, and the sight of pre-schoolers walking along the street in the rain or wind does not concern anybody. This is because they believe that there is no such thing as bad weather, only inappropriate clothing.
For the vast majority of our lives we breathe air in buildings. This air is of varying quality and usually we do not have much influence on the air quality in an office or school, especially if the building is equipped with a central air conditioning system. This is not the case in our own homes, provided there are no more smog alerts, of course!