M id-August through September. May through mid-October. J une through October. Mid-August through September. Users enter a ZIP code at the company's Internet site for the city in question and find the current level of allergy activity in that region and a prediction for the following week.
Morning runs before dew has a chance to dry and pollen becomes airborne are recommended.
Avoiding workouts on windy days. Pollen is very light and is easily transported by the wind. Working out right after a rain shower. Rain is effective for washing pollen out of the air. There is, as always, the concern that medications may be on the banned list.