
What Allergies Are Bad This Month? Month-by-Month U.S. Pollen Calendar
Use this month-by-month U.S. pollen calendar to compare tree, grass, weed, and mold seasons by region, then check current local conditions before planning exposure.
AllergyAva Resources
Clear, actionable guidance from the AllergyAva Editorial Team. Health-information resources are clinically reviewed before publication.

Use this month-by-month U.S. pollen calendar to compare tree, grass, weed, and mold seasons by region, then check current local conditions before planning exposure.

A clinically reviewed lawn-mowing and yard-work protocol covering respirators, pollen timing, asthma safety, clothing, showering, tools, and cleanup.

Compare MERV 11, MERV 13, and HEPA filtration for allergy homes using particle efficiency, pressure drop, filter depth, HVAC compatibility, and maintenance.

Compare dehumidifiers and air purifiers for pollen, pet dander, dust mites, mold, smoke, and damp rooms using humidity, CADR, and trigger-based buying criteria.

A clinically reviewed comparison of allergies, colds, and acute sinusitis using itchiness, symptom timing, fever, facial pain, mucus changes, and care thresholds.

Nighttime congestion can trace back to dust mites, pollen, pets, mold, sleeping position, or medication technique. Pinpoint the triggers disrupting your sleep.

Keep the pet you love while cutting dander exposure through a pet-free bedroom, HEPA filtration, smarter cleaning, grooming, testing, and treatment.

Turn your bedroom into a lower-exposure zone with mattress covers, weekly laundry, humidity control, HEPA cleaning, and a plan for testing and treatment.

Match birch, grass, ragweed, and mugwort pollen to common food cross-reactions, recognize PFAS symptoms, and identify signs of an emergency.

Make sense of allergy indexes and tree, grass, weed, and mold scores, then turn the next five days of pollen data into a practical plan.

Pollen can affect more than your nose. Recognize asthma warning signs, poor symptom control, and emergencies—and use an action plan to stay protected.

Pollen levels rise and fall with the hour and weather. Time walks, workouts, errands, and yard work to reduce exposure during allergy season.

Spot mold allergy symptoms, track down indoor triggers, clean up safely, and know when testing or medical care should be your next step.

Ragweed season has a predictable rhythm. Recognize its symptoms, track peak pollen, choose effective treatments, and know when to consult an allergist.

See how tree, grass, and weed pollen differ by season, symptoms, and food cross-reactions, with practical guidance on tracking, testing, and treatment.

Allergy shots are a long-term commitment. See how buildup and maintenance work, what benefits to expect, and which side effects need attention.

Work through an evidence-based bedroom checklist that tackles dust mites, pollen, pet dander, mold, and the exposures behind nighttime symptoms.

Persistent symptoms or treatments that no longer work may signal it is time for an allergist. Know what testing involves and how to prepare for your visit.

From spring trees to late-summer weeds, understand what triggers pollen reactions, when symptoms peak, and which prevention and treatment strategies help.

A useful air purifier needs more than a HEPA label. Match CADR to your room and balance noise, filter costs, performance, and overall value.

Build an allergy-friendly plate with anti-inflammatory foods that may support relief during pollen season, while avoiding ingredients that can aggravate symptoms.

Prepare before spring pollen spikes with an expert-backed timeline for starting medicine, readying your home, stocking supplies, and limiting exposure.

Tell seasonal allergies from a cold using symptom timing, fever, itchy eyes, and other revealing clues, then choose the right treatment and next step.