I'm not sure about the meaning of your question. If it is warm where you are, it probably won't do any harm. If not, your children could catch a chill and be uncomfortable. If you live in a place with a lot of air pollution, and it hasn't rained for a long time, their could be toxins washing out of the atmosphere.
It depends on the temperature. Rain itself is harmless. You just get wet. English studies have shown us that rain and wind do not make you ill. Other people do. However, if it is cold outside, you will be uncomfortable. Children cannot make those judgements.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics