Is it allergy season in Mississippi?

Mississippi's subtropical climate and flat Gulf Coastal Plain create an extended, intense allergy calendar. The state sits between two allergy powerhouses — Louisiana to the west and Alabama to the east — and shares their long seasons and high humidity. Oak and sweet gum begin in February across the south; the Delta's agricultural flatlands drive heavy grass pollen through summer; and a prolonged ragweed season runs August through October. The Gulf Coast near Gulfport and Biloxi sees the earliest onset and fewest relief days.

Mississippi's north-south extent creates meaningful variation. The Gulf Coast parishes and Harrison County see the earliest spring onset — tree pollen can appear in late January. The Delta's flat agricultural terrain amplifies grass and ragweed. Northern Mississippi near Tupelo shares timing with western Tennessee.

Jackson Metro

Central Mississippi and the ragweed belt

Jackson sits at the heart of Mississippi in a zone of high ragweed production. The Pearl River valley concentrates pollen on still evenings. Oak and sweet gum drive the spring season; Bermuda grass extends through summer; ragweed peaks intensely in August–September.

Oak · Feb–MayGrass · May–SepRagweed · Aug–Oct

Gulf Coast / Biloxi

Near-subtropical — earliest onset in the state

Gulfport and Biloxi sit on the Gulf Coast where the allergy season approaches Louisiana's year-round profile. Oak begins as early as late January. Gulf humidity keeps mold spores elevated alongside pollen. Bermuda grass extends well into September.

Oak · Jan–AprBermuda grass · Apr–SepMold year-round

Mississippi Delta

Agricultural flatlands and intense grass season

The Delta's flat, humid farmland produces exceptional grass pollen from Bermuda and other warm-season grasses. With no geographic barriers, wind carries pollen across the entire region. Ragweed production from the Delta's disturbed agricultural margins is also intense.

Grass · May–Sep (intense)Ragweed · Aug–OctAgricultural zone

North Mississippi / Tupelo

Tennessee Valley influence and slightly shorter season

Northern Mississippi near Tupelo shares weather patterns with western Tennessee. The season starts 2–3 weeks later than the Gulf Coast but spring tree pollen is still significant. Ragweed is intense but wraps earlier than the coast — typically by late September.

Oak · Mar–MayGrass · May–AugRagweed · Aug–Sep

Each row shows a full year of pollen for one region — trees in blue, grasses in green, weeds in amber. Look for where all three rows go quiet at the same time — that's your window.

Oral Allergy Syndrome (also called pollen-food allergy syndrome) causes tingling or mild itching in the mouth when you eat certain raw foods during the relevant pollen season. The proteins in the food are similar enough to the pollen protein that your immune system cross-reacts. Cooking usually deactivates the offending protein, so the same food cooked may cause no reaction.

Oak & Sweet Gum pollen

Stone fruits & apples

Apples, peaches, cherries, plums, pears, almonds, hazelnuts, carrots, celery

Peak risk February–May in Mississippi. The state's dense hardwood forests produce heavy oak and sweet gum pollen across the spring. The Gulf Coast sees earlier onset than any other allergen in the state.

Bermuda grass pollen

Tomatoes, potatoes & melons

Tomatoes, potatoes, kiwi, watermelon, cantaloupe, oranges (in some cases)

Peak risk May–September. Mississippi's long warm season extends Bermuda grass pollen well past what northern states see. The Delta's agricultural areas produce particularly high counts.

Ragweed

Melons & bananas

Watermelon, cantaloupe, honeydew, banana, zucchini, cucumber, sunflower seeds

Peak risk August–October. Mississippi ragweed season is prolonged by Gulf Coast warmth. Jackson and the central counties sit in a high ragweed production zone.

Not medical advice. If you suspect OAS, speak with an allergist — it can sometimes progress, and symptoms that extend beyond the mouth should be evaluated.