Should we go outside today?

Pollen count measures the number of pollen grains per cubic meter of air. Higher counts trigger allergy symptoms like sneezing, congestion, and itchy eyes. PollenTracker monitors pollen counts across 800+ cities in the US and UK so you know when it's safe to go outside.

Tree pollen peaks from March to May, grass pollen from May to July, and ragweed from August to October. The exact timing varies by region — Southern states start earlier, while Northern states have a compressed but intense season.

We combine real-time pollen levels, air quality index (AQI), and weather conditions into a single score. Based on this score, you get a clear YES (safe), CAUTION (take precautions), or NO (stay inside) recommendation.

Pollen count measures allergen particles from plants, primarily affecting allergy sufferers. The Air Quality Index (AQI) measures pollutants like PM2.5 and ozone that affect everyone's respiratory health. PollenTracker tracks both to give you the full picture.