Georgia Allergy Season: A Nearly Year-Round Calendar
Ask a Georgian when allergy season is and the honest answer is: mostly, it is now. The Georgia allergy season does not arrive in one neat spring burst and then retire. It opens with tree pollen in late winter, builds to one of the most famous spring pollen spectacles in the country around Atlanta, settles into a long grass summer, and returns in the fall with ragweed — with only a short, frost-dependent pause in the deepest part of winter. Understanding that rolling calendar is the difference between being ambushed by each wave and seeing it coming.
Key takeaways
- The Georgia allergy season runs in overlapping waves — trees in spring, grasses through summer, ragweed in fall — and Atlanta regularly places among the more challenging large cities in the Asthma and Allergy Foundation of America's annual Allergy Capitals rankings.
- Pollen Atlas data shows Atlanta's Tree Index doing its heaviest work in March and April, when pine and oak pollen overlap and counts can reach nationally notable levels.
- As documented in the Pollen Atlas account of Atlanta's record count, a spring day above 14,000 grains per cubic meter has been reported in the metro area — a figure that made national news.
- South Georgia starts each wave earlier and finishes later than the north Georgia mountains, so the same state can be weeks apart in its season at any given moment.
How Georgia allergy season unfolds through the year
Georgia's pattern is a relay, not a single race. Each pollen type hands off to the next, and the handoffs overlap enough that sensitive people rarely get a long break between late February and the first frost.
The spring tree wave
Trees open the year. Elm, maple, and juniper-type pollens stir in late winter, and then the main canopy follows: oak, hickory, pecan, and pine build through March and crest in April. The American Academy of Allergy, Asthma & Immunology's National Allergy Bureau tracks these counts through certified counting stations, and southeastern stations characteristically report their tree season weeks ahead of stations in the Northeast. By the time northern cities are seeing their first spring grains, Georgia's tree season is often at full strength.
The long grass summer
Grass takes the baton in May and holds it for months. Bermuda grass, a warm-season lawn and pasture grass across the South, pollinates through the heat, joined by bahia and other southern grasses. Summer thunderstorms complicate the picture: rain knocks pollen down for a few hours, then heat and humidity rebuild it. The result is a season that feels less like a peak and more like a plateau — moderate pressure, day after day, from late spring into early fall.
Atlanta's spring: pine dust, oak pollen, and record counts
Every spring, Atlanta turns faintly yellow-green. Cars, porches, and patio furniture collect a film of pollen, and the city's enormous tree canopy — Atlanta is famously a city set in a forest — releases at a scale few metros can match. Pine contributes much of the visible dust: pine pollen grains are large and conspicuous, and they settle on everything. Oak, flowering at the same time, contributes a large share of the allergenic load, along with hickory and other hardwoods woven through the metro's neighbourhoods.
The record-count reputation
Atlanta's spring fame is not just about dust. The metro's counting station has reported some of the highest single-day tree pollen counts recorded anywhere in the United States, including a day above 14,000 grains per cubic meter documented in our account of Atlanta's record pollen count. Numbers at that level are a product of density: millions of trees, a warm southern spring that brings them into flower together, and dry, breezy days that keep grains airborne. Readers checking Atlanta's daily pollen page in late March are watching one of the great pollen events of the American year, and the Asthma and Allergy Foundation of America has repeatedly ranked Atlanta among the more difficult large cities for seasonal allergies in its Allergy Capitals reports.
Fall ragweed and the season's second act
Just as summer grass pressure eases, ragweed opens the second act. From mid-August into October, ragweed pollen becomes the dominant weed pollen across Georgia, thriving in the disturbed ground the state has in abundance — roadsides, field edges, construction sites, and vacant lots. The season ends the way it does across most of the country: a hard frost stops the plants, and north Georgia, with its elevation, usually gets that frost weeks before the southern counties do.
The American College of Allergy, Asthma & Immunology describes the same late-summer handover in its seasonal resources, with weed pollens taking over as grasses fade. Fall in Georgia also carries a mold component. Fallen leaves, warm soil, and autumn rain support outdoor mold growth, which is why some Georgians find October nearly as demanding as April even as ragweed fades. The waves, in short, are not only pollen.
| Season phase | Main sources | Typical Georgia timing | Where it bites first |
|---|---|---|---|
| Early tree season | Elm, maple, juniper types | Late February into March | South Georgia, then Atlanta |
| Peak tree season | Oak, pine, hickory, pecan | March through April | Atlanta metro and the Piedmont |
| Grass season | Bermuda, bahia, mixed grasses | May through September | Statewide, strongest in the south |
| Ragweed season | Ragweed, other fall weeds | Mid-August to first frost | Statewide, ending first in the mountains |
| Quiet window | Minimal outdoor pollen | After frost into mid-winter | Longest in north Georgia |
North Georgia vs. South Georgia: two versions of the season
Georgia spans enough latitude and elevation to hold two different calendars at once. The north Georgia mountains run cooler, start spring later, and reach frost earlier — a compressed season with a genuine winter break. The Piedmont, including Atlanta and stretching toward Charlotte, North Carolina in character if not in state, sits in the middle: early springs, long summers, and falls that stay warm deep into October. South Georgia — the coastal plain of wiregrass, pines, and farmland — starts earliest and finishes latest, with a rhythm closer to the Florida allergy season than to the mountains a few hours north. Travellers moving between regions feel the difference immediately, and upstate neighbours such as Greenville, South Carolina share the Piedmont pattern almost exactly.
Tracking Georgia allergy season day by day
A state calendar gives you the shape of the year; it cannot tell you about Thursday. That is what daily data is for. On Pollen Atlas, every city page carries a Total Pollen Index and separate Tree, Grass, and Weeds indexes, each scored from 0 to 100 — Low from 0 to 33, Moderate from 34 to 66, and High from 67 to 100 — so you can see which wave is doing the work on a given morning. The national city rankings show how Georgia cities stack up on the days when the whole Southeast lights up at once. And because Georgia's seasons are long and layered, people who want to know exactly which pollens affect them can search the Pollen Atlas Find an Allergist directory by city and specialty. This article is general information about a seasonal pattern, not medical advice.
Frequently Asked Questions
When does allergy season start in Georgia?
Allergy season in Georgia starts in late winter, when the first tree pollens appear in February. The main tree season builds through March, grass follows in May, and ragweed closes the year from mid-August until the first frost.
What is the worst month for allergies in Georgia?
April is typically the hardest month, because peak oak, pine, and hickory pollen overlap across most of the state. September runs a strong second in many years, when ragweed peaks and summer grass has not yet finished.
Why is Atlanta's pollen count so famous?
Atlanta's pollen count is famous because the metro sits inside an enormous tree canopy that flowers together in a warm southern spring. Its counting station has reported single-day tree counts above 14,000 grains per cubic meter, among the highest figures reported in the United States.
Does Georgia have allergies in winter?
Winter is Georgia's quietest window, but it is short and frost-dependent. After a hard frost ends ragweed, outdoor pollen drops sharply until late February — though warm spells in the southern counties can stir early tree pollen sooner.
Conclusion
The Georgia allergy season rewards people who think in waves rather than dates: trees in the spring, grass through the long summer, ragweed in the fall, and a brief rest that frost decides. Know which wave you are in, watch the daily indexes while it runs, and the state's longest season becomes a calendar you can plan around instead of a surprise that repeats. Check the pollen before it checks you — free counts and forecasts, worldwide: PollenAtlas.com
Sources
- Asthma and Allergy Foundation of America (AAFA), Allergy Capitals annual reports (Atlanta's recurring placement among challenging large cities for seasonal allergies).
- American Academy of Allergy, Asthma & Immunology (AAAAI), National Allergy Bureau counting-station network and seasonal pollen reporting.
- Atlanta Allergy & Asthma count reporting, as documented in the Pollen Atlas account of Atlanta's record pollen count (single-day tree count above 14,000 grains per cubic meter).