Mild
Mild pollen — sensitive individuals may notice
Weed pollen is the main trigger · Tomorrow → · Updated 15 hours ago
Today in Chattanooga: weed pollen is moderate, tree pollen is low, grass pollen is very low. Overall score: 38/100. Allergies are mild right now; sensitive people may notice symptoms. Tomorrow is expected to be about the same. Updated at 2:00 AM.
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Pollen levels in Chattanooga are currently low. Most people should not experience allergy symptoms from pollen.
Tree pollen: Low. Grass pollen: Very Low. Weed pollen: Moderate.
Tomorrow's pollen forecast for Chattanooga is expected to be about the same, with moderate pollen conditions.
Weed pollen is the highest supported pollen type in Chattanooga today. Weed pollen is moderate.
Tree pollen in Chattanooga is low today.
Grass pollen in Chattanooga is very low today.
Weed pollen in Chattanooga is moderate today.
Tomorrow's pollen forecast for Chattanooga is expected to be about the same, with moderate pollen conditions.
Nestled in a valley along the Tennessee River and surrounded by the southern Appalachian foothills, Chattanooga consistently ranks among the most challenging U.S. cities for seasonal allergies. Its humid subtropical climate, long growing season, and bowl-like geography trap pollen and pollutants, intensifying symptoms for sensitive residents.
Tree pollen kicks off the allergy calendar in late February and surges through May, with oak, cedar, juniper, maple, birch, hickory, sycamore, and pine driving peak counts in March and April. As tree season winds down, grass pollen takes over from May into July, dominated by Bermuda, Timothy, orchard, and fescue grasses that thrive in the region's warm, wet conditions.
Weed pollen then defines the fall allergy season from mid-August through the first hard frost in late October or November, with ragweed as the primary culprit alongside pigweed, lamb's quarters, and plantain. The overlap between lingering grasses and early ragweed in August often produces the year's most intense symptom spikes.
Beyond pollen, Chattanooga's humidity fuels year-round outdoor and indoor mold, while the valley's stagnant air frequently traps dust and ozone pollution. Overall, the city's allergy profile is defined by a long, overlapping, and pollutant-amplified season spanning roughly nine months of the year.