"Pollen is less severe on rainy, cloudy, or windless days because pollen needs to move around in the air in order to get into our noses, eyes, and airways," Dr. Gupta explained. "On hot, dry, and windy days, your allergies might increase, so these are the days you might not want to work out outside."
Of course, pollen counts can vary even from one hour to the next. "The best times of day for low pollen counts — and therefore working out — are usually before dawn and in the late afternoon to early evening," she added. If you want to be certain, you can check the pollen count with a quick google search before you head outdoors. "If it's a particularly high pollen day, you might want to stay inside," Dr. Gupta said.