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*Disclaimer: HeyAllergy® provides all clinical services furnished to patients in California, Florida, Texas, Illinois, Nevada, Pennsylvania. In New York, clinical services are furnished by Hey Allergy Medicine.
Real-time pollen data for Dallas — updated daily. Powered by board-certified allergists.
Cedar fever reaches Dallas from the Hill Country to the south. While Dallas is farther from the Ashe juniper forests than Austin or San Antonio, cedar pollen is lightweight enough to travel hundreds of miles on prevailing winds. Dallas residents experience cedar fever from late December through February, with symptoms including severe congestion, fatigue, sore throat, and headaches. Cedar pollen counts in Dallas are typically lower than in Central Texas but still high enough to cause significant symptoms in sensitized individuals.
The DFW Metroplex sits in the Southern Great Plains allergy region, where cold fronts can carry concentrated cedar pollen northward from the Hill Country in intense pulses, creating days of very high counts followed by brief relief.
Spring tree pollen is arguably Dallas's worst allergy season. Oak is the dominant trigger, with live oak and post oak producing massive pollen loads from March through May. Elm trees pollinate in two waves — spring elm from February through April and fall elm from September through November — making elm a nearly year-round allergen. Ash, pecan, hickory, cottonwood, poplar, mulberry, and walnut trees all contribute significant pollen from February through May. Pecan pollen peaks in April and is a particularly strong allergen in North Texas.
Bermuda grass is the dominant grass allergen in Dallas, thriving in the warm North Texas climate. Johnson grass, Timothy grass, and ryegrass are additional contributors. Dallas's long warm season extends grass pollen from April through October — roughly seven months of continuous grass exposure. Wild, uncut grass along roadsides, vacant lots, and highway medians across the sprawling DFW Metroplex adds to residential lawn and park sources.
Dallas-Fort Worth has among the highest ragweed counts and longest ragweed seasons in the United States. While ragweed season lasts only weeks in some parts of the country, it can persist for up to four months in Texas, running from August through November. A single ragweed plant produces up to one billion pollen grains that can travel hundreds of miles. Pigweed, sagebrush, lamb's quarters, Russian thistle, and tumbleweed add to the fall weed pollen load.
Fall elm trees add a second tree pollen wave during ragweed season, creating overlapping allergen exposures that compound symptoms for multi-sensitized individuals.
Mold thrives in Dallas's humid subtropical climate, with spore counts highest during July and August when humidity peaks. Mold accumulates on dead grass, fallen leaves, and outdoor surfaces, and spores travel easily on wind. Indoor mold is common in homes with poor ventilation or moisture issues. Dust mites, cockroach allergens, and pet dander contribute to year-round indoor allergen exposure, with symptoms often worsening during winter when homes are sealed and heating systems circulate allergens.
Winter in Dallas brings cedar fever as mountain cedar pollen travels north from the Hill Country. Cedar pollen counts spike after cold fronts bring southerly winds, creating intense but episodic exposure days. Indoor allergens intensify as residents seal homes and run heating systems. Dust mites, pet dander, and cockroach allergens concentrate in sealed environments. Elm trees may begin pollinating as early as late January during mild winters.
Top allergens: Mountain cedar, dust mites, indoor mold, pet dander
Severity: Moderate to high (cedar), moderate (indoor)
Tip: Cedar fever in Dallas comes in waves tied to weather fronts — check pollen forecasts after cold fronts pass. If you get flu-like symptoms every January that resolve indoors, it's likely cedar allergy, not the flu.
This is Dallas's most intense allergy period. Oak pollen dominates with massive counts from March through May. Ash, pecan, elm, hickory, mulberry, cottonwood, and poplar trees pile on. Pecan pollen peaks in April and is a particularly potent allergen in North Texas. By late April, early grass pollen begins overlapping with tree pollen, creating a brutal double-exposure window. The DFW area's extensive tree canopy — from the Cross Timbers ecoregion to suburban landscaping — produces pollen loads that coat outdoor surfaces in yellow-green dust.
Top allergens: Oak, ash, pecan, elm, hickory, mulberry, cottonwood, early grass
Severity: High to very high
Tip: Dallas spring pollen is inescapable outdoors. Keep car windows closed with AC on recirculate, shower immediately after coming inside, and start allergy medications by early March — don't wait until symptoms hit.
Bermuda grass pollen peaks in early summer, with Johnson grass and ryegrass contributing. Dallas's summer heat and humidity create ideal conditions for mold growth, with July and August being the worst months for mold spore counts. The combination of grass pollen and elevated mold makes summer uncomfortable for multi-sensitized residents. Thunderstorms temporarily wash pollen from the air but trigger mold surges within 24–48 hours.
Top allergens: Bermuda grass, Johnson grass, mold spores (Alternaria, Cladosporium)
Severity: Moderate to high
Tip: July and August humidity in Dallas means mold is a major factor. If your symptoms worsen during summer despite dropping grass pollen, mold is likely contributing. Run dehumidifiers and replace AC filters monthly.
Dallas's ragweed season is one of the longest and most intense in the country, stretching from August through November — up to four months. Ragweed pollen counts in the DFW area are among the highest nationally. Fall elm adds a second tree pollen wave that overlaps with ragweed, compounding symptoms. Pigweed, sagebrush, and other weeds contribute. Mold remains elevated from decomposing fallen leaves.
Top allergens: Ragweed (extremely high), fall elm, pigweed, sagebrush, mold
Severity: High to very high
Tip: Dallas's ragweed season outlasts most U.S. cities by months. If fall is your worst allergy season, ragweed-specific immunotherapy can be transformative. Don't wait until September to prepare — start premedication by mid-August.
While ragweed season lasts just weeks in some parts of the country, Dallas-Fort Worth endures up to four months of ragweed exposure from August through November. The DFW area has some of the highest ragweed counts in the nation. Starting allergy medications in mid-August — before symptoms hit — is far more effective than trying to catch up once ragweed peaks in September. If OTC antihistamines aren't cutting it, sublingual immunotherapy targeting ragweed can provide lasting relief through the entire extended season.
Dallas residents often assume cedar fever is an Austin and San Antonio problem. While Dallas is farther from the Hill Country, mountain cedar pollen travels hundreds of miles on prevailing winds, and cold fronts regularly push concentrated cedar pollen into the DFW Metroplex. Cedar fever in Dallas comes in episodic waves tied to weather patterns — a few days of very high counts followed by relief. If you get "the flu" every January that mysteriously clears up on certain days, get tested for cedar allergy.
The Dallas-Fort Worth Metroplex spans over 9,000 square miles, and allergen exposure varies significantly across the metro. The Cross Timbers ecoregion to the west has heavy oak and hickory pollen, suburban areas with extensive landscaping produce concentrated tree and grass pollen, and the agricultural areas east of the Metroplex contribute grass and ragweed. If you commute across the metro, your allergen exposure changes with your route. Track pollen counts specific to your area rather than relying on a single DFW-wide forecast.
Dallas's July and August humidity creates peak mold conditions. Mold spores thrive on dead grass, fallen leaves, outdoor surfaces, and in poorly ventilated homes. Children's Health experts note that mold symptoms can occur year-round in Dallas, with the worst months being July and August. If your allergy symptoms persist or worsen during summer even as grass pollen drops, mold is likely a significant trigger. Run dehumidifiers in the most humid months, clean AC units, and address any moisture issues in your home before summer arrives.
Dallas has two especially challenging overlap periods: late April through May (tree pollen + early grass pollen) and September through October (ragweed + fall elm + mold). During these overlap periods, you're exposed to multiple allergen types simultaneously, and single-target OTC medications may not provide adequate relief. A board-certified allergist can identify all your triggers and create a comprehensive plan that addresses multiple allergens rather than just one.
With year-round allergen exposure and some of the highest ragweed counts in the nation, managing Dallas allergies with OTC medications alone is fighting a losing battle. HeyAllergy's board-certified allergists can identify your specific triggers through blood testing and create a personalized HeyPak® sublingual immunotherapy plan targeting the North Texas allergens causing your symptoms. Most patients notice improvement within 3–6 months. Book a telemedicine consultation from anywhere in the DFW Metroplex — no clinic visit needed, no waitlist.
December through February (cedar fever), March through May (oak and tree pollen peak), and September through November (ragweed — among the highest counts in the U.S.) are all severe. Dallas has year-round allergies with no true off-season. Peak months are typically January, March–April, and September.
Ragweed season in Dallas-Fort Worth lasts up to four months (August through November), significantly longer than in northern states where frost arrives earlier. Texas's mild fall temperatures allow ragweed to keep producing pollen well into November, and the DFW area's geography in the Southern Great Plains supports high ragweed concentrations.
Yes. While Dallas is farther from the Hill Country than Austin or San Antonio, mountain cedar pollen travels hundreds of miles on prevailing winds. Dallas residents experience cedar fever from late December through February, with symptoms arriving in episodic waves tied to cold fronts that push cedar pollen northward.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists licensed in Texas. You can book a virtual consultation, have allergy blood tests ordered at a local lab, receive a diagnosis, and start treatment — all without visiting a clinic. No waitlist.
HeyAllergy's HeyPak® sublingual immunotherapy drops are customized based on your blood allergy test results and formulated with allergens specific to the Dallas region — including cedar, oak, elm, pecan, Bermuda grass, ragweed, dust mites, and mold. You place drops under your tongue daily at home. Over 3–6 months, your immune system builds tolerance, reducing symptoms and medication dependence.
HeyAllergy accepts Medicare and most major PPO health plans, including United Healthcare, Anthem Blue Cross, Blue Shield, Cigna, Aetna, Humana, Oscar, and Tricare. Telemedicine benefits vary by plan — contact your insurance provider with HeyAllergy's Tax ID (85-0834175) to confirm your specific coverage.
Yes. Cedar fills winter, oak and other trees dominate spring, Bermuda grass covers summer, ragweed takes fall (for up to four months), fall elm adds a second tree pollen wave in autumn, and mold is present year-round with peaks in July and August. Dallas is one of the few major metros with no allergy-free month.
HeyAllergy has no waitlist. You can book an online appointment at a time that works for you and see a board-certified allergist via secure video consultation — typically within days, not weeks. Available for residents throughout the DFW Metroplex including Dallas, Fort Worth, Arlington, Plano, Frisco, McKinney, and Denton.
Dallas consistently lands on annual "worst cities for allergies" lists, and the data supports the reputation. The DFW Metroplex sits in the Southern Great Plains allergy region, where convergent factors create year-round allergen exposure: cedar pollen travels north from the Hill Country in winter, the Cross Timbers ecoregion produces heavy tree pollen in spring, the warm climate supports a seven-month grass season, and the area's ragweed season is among the longest and most intense in the nation. Add year-round mold in Dallas's humid subtropical environment, and residents face an allergy calendar with no true off-season.
For the 1.34 million residents of Dallas proper — and the 7.6 million across the broader DFW Metroplex — allergies are a persistent health concern that affects quality of life, work productivity, and daily comfort across every season.
If there's one allergen that sets Dallas apart, it's ragweed. The DFW area has among the highest ragweed counts and the longest ragweed season in the United States. While ragweed season may last only a few weeks in northern states where early frost kills the plants, Dallas's mild fall temperatures allow ragweed to produce pollen from August through November — up to four months of continuous exposure. A single ragweed plant produces up to one billion pollen grains, and those grains are lightweight enough to travel hundreds of miles on wind.
This extended ragweed season is compounded by fall elm, which adds a second tree pollen wave from September through November. The overlap means Dallas residents face simultaneous ragweed and elm exposure during fall — a double allergen load that makes autumn one of the most challenging seasons, not the relief period that residents of other cities enjoy as summer fades.
Dallas residents sometimes assume cedar fever is a Central Texas problem. While the heaviest cedar pollen concentrations occur closer to the Hill Country, mountain cedar pollen is lightweight and travels easily on prevailing winds. When cold fronts pass through Texas, they can push concentrated cedar pollen from the Hill Country northward into the DFW Metroplex. This creates an episodic pattern: intense cedar pollen days after weather fronts, followed by lower counts until the next front arrives.
For Dallas residents sensitized to cedar, this means winter brings unpredictable allergy flares. The pattern often confuses sufferers who assume they have recurring colds or flu because the symptoms appear and disappear with weather changes rather than following a predictable calendar like spring tree pollen.
Dallas sits at the eastern edge of the Cross Timbers, a band of oak and hickory forest that historically ran through North Texas. This ecoregion, combined with extensive suburban landscaping and the city's many parks, creates substantial tree pollen sources. Post oak, live oak, pecan, hickory, elm, ash, cottonwood, and mulberry trees all produce heavy pollen from February through May. Pecan pollen, peaking in April, is a particularly potent allergen unique to the Texas tree mix.
The DFW Metroplex's rapid suburban expansion over recent decades has paradoxically increased tree pollen exposure for many residents, as new developments in formerly agricultural or ranching land include extensive landscaping with pollen-producing native and ornamental trees.
Dallas summers are hot and humid, with July and August bringing the worst conditions for mold growth. Mold spores accumulate on dead grass, fallen leaves, outdoor surfaces, and in homes with poor ventilation. The combination of grass pollen in early summer and rising mold spore counts through July and August means summer offers no real allergy break. Thunderstorms provide temporary pollen relief but trigger mold surges within 24–48 hours, and the post-storm humidity sustains elevated mold levels for days.
The DFW Metroplex spans over 9,000 square miles — one of the largest metro areas in the country. Commuting from Frisco to a specialist in Oak Cliff, or from McKinney to an allergist in Arlington, can consume hours on I-635, I-35, or I-30. Traditional allergy clinics often have multi-week wait times for new patients, and allergy shot schedules requiring weekly visits are impractical across the sprawling Metroplex.
HeyAllergy eliminates these barriers. Residents from Dallas to Fort Worth to Plano to Denton can see a board-certified allergist from home via secure video consultation. Blood allergy tests can be ordered to a convenient local lab anywhere in DFW, and a personalized treatment plan — including HeyPak® sublingual immunotherapy drops targeting North Texas allergens — can begin without a single in-person visit. No needles, no LBJ Freeway traffic, no waitlist.
If your fall allergy season stretches from August through November (ragweed), if cedar fever hits you every winter, if spring tree pollen makes March through May miserable, if OTC antihistamines aren't controlling your symptoms through Dallas's year-round allergy calendar, if mold-related symptoms worsen during humid summer months, if you've recently moved to DFW and developed new allergies, or if you have both allergies and asthma, it's time to see a board-certified allergist.
HeyAllergy accepts Medicare and most major PPO health plans, making expert allergy care accessible for residents throughout the DFW Metroplex.
