Atlanta Pollen Tracker

35 years of data + machine learning

Extreme
0grains/m³

Last measured

~5 more extreme days likely this spring
Season is just getting started 32,741 cumulative grains so far. Historically, only 17% of the season's total pollen has fallen by this date.

This Spring So Far

Daily pollen counts from Atlanta Allergy & Asthma's certified counting station. Bars colored by severity threshold.

How unusual is this?

The latest count of 2,008 is nearly 2x the historical average for this date (mean 1,095, median 334 over 29 years). 2026 is tracking as a well-above-average season — already in the 83rd percentile of total burden by day 85.

7
Extreme days this season
14,801
All-time worst day
Mar 29, 2025
+3.9%
Annual increase
in pollen counts
35
Years of data
1992 – 2026

When Does It End?

The S-curve tracks cumulative pollen burden through the season. The shaded band shows where 80% of historical years fell. 2026's bold line shows where we are now.

The Model

A 44-feature linear regression trained on 35 years of daily observations. Not a black box — here's exactly what drives the forecast.

What Drives the Prediction

Top 8 features by weight magnitude in the V8 model. Green bars push the count up; coral bars push it down.

    85.8%
    Bad-day accuracy
    (count ≥ 90 threshold)
    91%
    Recall — catches 9 of 10
    bad days before they hit
    44
    Features including weather,
    persistence, seasonality