Allergy sufferers in Mesa face nearly continuous exposure to allergens, with peak periods in spring and late summer. Tree pollen from oak, juniper, and mesquite is most potent from February to May, while Bermuda grass pollen peaks in summer. Ragweed and sagebrush dominate the air from August to November, causing symptoms like sneezing, congestion, and itchy eyes. Nearly 70% of asthmatics in Mesa report allergens as a major trigger, making it crucial to monitor pollen levels and take precautions.