Today's allergy forecast depends on three main factors: pollen levels, mold spore counts, and local weather conditions. This guide explains what drives the allergy forecast and how to interpret it.
Peak season: Year-round, peaking spring (tree pollen), summer (grass), and fall (ragweed)
Most affected regions: Southeast, South, Midwest, Northeast
Common symptoms: Sneezing, itchy eyes, runny nose, congestion, fatigue.
Today's allergy forecast is based on current pollen counts, weather conditions, and the time of year. Forecasts are rated Low, Moderate, High, or Very High. Select your city above to see the local forecast.
Which allergens are high today depends on your location and the season. In spring, tree pollen (oak, birch, cedar) dominates. In summer, grass pollen peaks. In fall, ragweed is the primary allergen across most of the US.
The allergy forecast combines real-time pollen data from air quality monitors, historical seasonal patterns, and weather forecasts (temperature, wind speed, humidity, and precipitation).