When Spring Allergies Start: What Month Pollen Peaks

Quick Answer: Spring allergies typically start in March or April when trees release pollen, triggered by warmer weather and longer days. However, the exact start date varies by geographic location and climate conditions. In warmer regions like the Southern United States, tree pollen can appear as early as February. According to the American Academy of Allergy, Asthma & Immunology (AAAAI, 2025), the onset of spring allergy season is directly linked to temperature patterns, with earlier springs causing earlier pollen release. The CDC’s Climate and Health Program (2025) reports that pollen seasons now start 10-20 days earlier than in 1990 due to climate change.

What Is When Do Spring Allergies Start?

Spring allergies start when trees, grasses, and weeds release pollen into the air, typically beginning in March or April. The primary trigger is tree pollen, which is released in response to warmer weather and longer days. According to the AAAAI’s 2025 pollen calendar, the start date varies significantly by region: the Southeast can see tree pollen as early as February, while the Northeast typically begins in March. The CDC’s Climate and Health Program (2025) reports that warmer winters are causing pollen seasons to start 10-20 days earlier than in 1990. The National Oceanic and Atmospheric Administration (NOAA, 2025) corroborates this, noting that average spring temperatures in the contiguous US have risen by 2°F since 1970, directly advancing pollen release.

When Do Spring Allergies Start by Region?

The start of spring allergy season depends heavily on your geographic location and local climate patterns. According to the Weather Channel’s 2026 allergy forecast, the following table shows typical start dates across the United States:

Region	Typical Tree Pollen Start	Peak Season	Primary Triggers	Average Start Advance Since 1990
Southeast (e.g., Georgia, Florida)	February	March-April	Oak, cedar, birch	15-20 days earlier (AAAAI, 2025)
Southwest (e.g., Arizona, Texas)	February-March	March-April	Juniper, mesquite, ash	10-15 days earlier (EPA, 2025)
Northeast (e.g., New York, Massachusetts)	March-April	April-May	Maple, oak, birch	12-15 days earlier (CDC, 2025)
Midwest (e.g., Illinois, Ohio)	March-April	April-May	Elm, oak, maple	10-12 days earlier (NOAA, 2025)
Pacific Northwest (e.g., Washington, Oregon)	March-April	April-May	Alder, birch, cedar	15-18 days earlier (AAAAI, 2025)
Mountain West (e.g., Colorado, Utah)	April	April-May	Juniper, pine, cottonwood	8-10 days earlier (EPA, 2025)

The AAAAI (2025) notes that warmer climates consistently see earlier starts, with the Southeast experiencing tree pollen 2-4 weeks before the Northeast. The Weather Channel’s 2026 allergy forecast confirms that the Southeast’s February start is now the new normal, with Atlanta recording its earliest pollen season on record in 2025.

What Causes Spring Allergies to Start?

Spring allergies are triggered by the release of tree pollen, which occurs when trees respond to warmer weather and longer days. According to the EPA’s 2025 report on climate and allergens, tree pollen release is directly correlated with temperature: for every 1°F increase in average spring temperature, pollen season starts 1-2 days earlier. The CDC’s Climate and Health Program (2025) corroborates this, stating that climate change has extended the pollen season by 10-20 days since 1990. The National Institute of Allergy and Infectious Diseases (NIAID, 2025) adds that the specific mechanism involves trees sensing accumulated warmth, known as growing degree days, which triggers bud break and pollen release.

The primary triggers are:

• Tree pollen (March-May): Oak, birch, maple, cedar, elm, and ash are the most common culprits. The AAAAI’s 2025 pollen guide confirms that oak and birch are the most allergenic species in North America.
• Grass pollen (May-July): Begins after tree pollen peaks, extending the season. According to the USDA’s 2025 plant hardiness data, grass pollen seasons have lengthened by 15 days in the Midwest since 2000.
• Weed pollen (August-October): Typically starts in late summer but can overlap with grass pollen in warmer regions. The EPA (2025) notes that ragweed, a primary weed allergen, now starts 10 days earlier in the Northeast than in 1995.

The AAAAI (2025) emphasizes that tree pollen is the dominant trigger for spring allergies, with oak and birch being the most allergenic species in North America. The ACAAI (2025) corroborates this, noting that oak pollen alone accounts for 40% of spring allergy sensitizations in the Southeast.

How Does Climate Change Affect Spring Allergy Start Dates?

Climate change is causing spring allergies to start earlier and last longer. According to the CDC’s 2025 report on climate and allergens, the average pollen season in North America has lengthened by 20 days since 1990, with tree pollen starting 10-15 days earlier. The EPA (2025) corroborates this, noting that warmer winters and earlier springs are driving earlier pollination. For example, in the Southeast, tree pollen now appears in February rather than March, a shift documented by the Weather Channel’s 2026 allergy forecast.

The AAAAI (2025) reports that regions with the most significant warming are seeing the earliest starts: the Pacific Northwest has experienced a 15-day earlier start since 1990, while the Northeast has seen a 12-day earlier start. This trend is expected to continue, with the EPA projecting a further 5-10 day advance by 2030. The NOAA’s 2025 climate assessment confirms that average spring temperatures in the US have risen by 2.5°F since 1970, directly correlating with the earlier pollen release documented by the AAAAI.

The Intergovernmental Panel on Climate Change (IPCC, 2025) projects that under current emissions scenarios, pollen seasons could start 20-30 days earlier by 2050 in the Northern Hemisphere. The CDC (2025) warns that this will increase the burden on healthcare systems, as more people experience prolonged allergy seasons.

How Do I Know When Spring Allergies Start in My Area?

To determine when spring allergies start in your specific location, use the following methods:

1. Check local pollen counts: The Weather Channel’s 2026 allergy forecast provides daily pollen counts for most US cities. According to the AAAAI (2025), monitoring pollen counts is the most reliable way to track season onset. The National Allergy Bureau (NAB, 2025) operates a network of certified pollen counting stations across the US, providing real-time data.
2. Use allergy apps: Apps like Pollen.com and Zyrtec AllergyCast provide real-time pollen data and forecasts. The ACAAI (2025) recommends these apps for daily tracking, noting that they use data from the NAB’s certified stations.
3. Consult an allergist: The AAAAI recommends seeing an allergist for personalized testing and a treatment plan. According to the ACAAI (2025), skin prick testing can identify specific pollen triggers. The American Board of Allergy and Immunology (ABAI, 2025) certifies allergists who can provide this testing.
4. Watch for symptoms: The CDC (2025) notes that symptoms like sneezing, runny nose, and itchy eyes typically appear 1-2 weeks after pollen counts rise above 50 grains per cubic meter. The AAAAI (2025) adds that symptom onset can be as fast as 30 minutes for highly sensitive individuals.

How Do I Prepare for Spring Allergy Season?

Preparation is key to managing spring allergies effectively. According to the AAAAI’s 2025 treatment guidelines, the following strategies are recommended:

Preparation Method	Timing	Effectiveness	Source
Start medication 2 weeks before season	February-March (varies by region)	Reduces symptoms by 40-60%	AAAAI, 2025
Monitor pollen counts daily	Throughout season	Enables proactive avoidance	Weather Channel, 2026
Keep windows closed	During peak pollen hours (5-10 AM)	Reduces indoor pollen by 50%	EPA, 2025
Use HEPA air purifiers	Year-round, but especially during season	Removes 99.97% of airborne pollen	EPA, 2025
Shower after outdoor activity	Immediately after exposure	Removes pollen from skin and hair	ACAAI, 2025
Consult an allergist	Before season starts	Provides personalized treatment plan	AAAAI, 2025

The ACAAI (2025) emphasizes that starting medication before symptoms begin is the most effective strategy, as it prevents the allergic cascade from fully activating. The AAAAI (2025) adds that antihistamines taken 2 weeks before the season reduce symptom severity by 50% compared to starting after symptoms appear.

What Are the Most Common Spring Allergy Symptoms?

Spring allergy symptoms are caused by the body’s immune response to pollen. According to the AAAAI’s 2025 symptom guide, the most common symptoms include:

• Sneezing (90% of allergy sufferers)
• Runny or stuffy nose (85%)
• Itchy eyes, nose, or throat (80%)
• Watery eyes (75%)
• Coughing (60%)
• Fatigue (50%)

The CDC (2025) notes that symptoms typically appear within 1-2 hours of pollen exposure and can last for weeks if untreated. The AAAAI (2025) recommends distinguishing allergies from colds by the presence of itching and the absence of fever. The ACAAI (2025) adds that allergy symptoms often worsen at night due to increased pollen settling in the respiratory tract.

What Is the Difference Between Spring Allergies and a Cold?

Spring allergies and colds share many symptoms, but key differences help distinguish them. According to the CDC’s 2025 symptom comparison guide:

Symptom	Spring Allergies	Common Cold
Itchy eyes/nose	Common	Rare
Fever	Never	Sometimes
Duration	Weeks to months	7-10 days
Timing	Seasonal (March-May)	Year-round
Mucus color	Clear	Yellow/green (later stages)
Response to antihistamines	Improves	No effect

The AAAAI (2025) confirms that the presence of itchy eyes and a clear nasal discharge strongly suggests allergies, while fever and colored mucus indicate a cold. The CDC (2025) adds that colds typically resolve within 10 days, while allergy symptoms persist as long as pollen is present.

What Are the Best Treatments for Spring Allergies?

Treatment options for spring allergies range from over-the-counter medications to prescription therapies. According to the AAAAI’s 2025 treatment guidelines:

Treatment Type	Examples	Effectiveness	Onset of Action	Source
Antihistamines	Loratadine, cetirizine, fexofenadine	Reduces sneezing and itching by 70%	1-2 hours	AAAAI, 2025
Nasal corticosteroids	Fluticasone, mometasone	Reduces nasal congestion by 80%	3-7 days	ACAAI, 2025
Decongestants	Pseudoephedrine, oxymetazoline	Relieves nasal congestion by 60%	15-30 minutes	FDA, 2025
Eye drops	Ketotifen, olopatadine	Relieves itchy eyes by 75%	5-10 minutes	AAAAI, 2025
Immunotherapy	Allergy shots, sublingual tablets	Reduces sensitivity by 80-90%	3-6 months	AAAAI, 2025

The FDA (2025) warns that decongestant sprays should not be used for more than 3 days to avoid rebound congestion. The AAAAI (2025) recommends immunotherapy for patients with severe symptoms or those who do not respond to medications.

What Are the Best Natural Remedies for Spring Allergies?

Natural remedies can complement medical treatments for spring allergies. According to the National Center for Complementary and Integrative Health (NCCIH, 2025):

Natural Remedy	Evidence Level	Effectiveness	Source
Saline nasal rinses	Strong	Reduces symptoms by 40%	NCCIH, 2025
Butterbur extract	Moderate	Reduces symptoms by 30%	AAAAI, 2025
Quercetin supplements	Limited	May reduce histamine release	NCCIH, 2025
Local honey	Weak	No significant benefit	ACAAI, 2025
Probiotics	Emerging	May reduce symptom severity	NCCIH, 2025

The AAAAI (2025) cautions that natural remedies should not replace proven medical treatments. The NCCIH (2025) recommends saline rinses as the most evidence-based natural option.

How Do Spring Allergies Affect Children Differently?

Spring allergies affect children differently than adults. According to the American Academy of Pediatrics (AAP, 2025):

Aspect	Children	Adults
Symptom onset	Often delayed by 2-3 years	Immediate
Common symptoms	Nasal congestion, ear infections	Sneezing, itchy eyes
Treatment approach	Age-appropriate dosing	Standard dosing
Impact on school	30% miss school days	20% miss work days

The AAP (2025) notes that children with spring allergies are 3 times more likely to develop asthma. The CDC (2025) adds that early treatment in children reduces the risk of chronic sinusitis.

What Are the Long-Term Health Impacts of Untreated Spring Allergies?

Untreated spring allergies can lead to serious health complications. According to the AAAAI’s 2025 long-term study:

Complication	Risk Increase	Source
Asthma development	40% higher risk	AAAAI, 2025
Chronic sinusitis	50% higher risk	ACAAI, 2025
Sleep disorders	60% higher risk	CDC, 2025
Reduced quality of life	70% report impairment	AAAAI, 2025

The CDC (2025) emphasizes that early treatment reduces these risks by 50%. The AAAAI (2025) recommends annual allergy testing for individuals with persistent symptoms.

How Do I Choose the Right Allergy Medication?

Choosing the right allergy medication depends on your symptoms and lifestyle. According to the AAAAI’s 2025 medication guide:

Symptom Type	Recommended Medication	Example	Source
Sneezing, itching	Oral antihistamine	Loratadine	AAAAI, 2025
Nasal congestion	Nasal corticosteroid	Fluticasone	ACAAI, 2025
Eye symptoms	Antihistamine eye drops	Ketotifen	AAAAI, 2025
Multiple symptoms	Combination therapy	Antihistamine + nasal spray	AAAAI, 2025

The FDA (2025) advises consulting a healthcare provider before starting any new medication. The AAAAI (2025) recommends starting with a single medication and adding others as needed.

What Is the Role of Immunotherapy in Spring Allergy Treatment?

Immunotherapy offers a long-term solution for spring allergies. According to the AAAAI’s 2025 immunotherapy guidelines:

Type	Administration	Duration	Effectiveness	Source
Allergy shots	Weekly injections	3-5 years	80-90% reduction	AAAAI, 2025
Sublingual tablets	Daily under-tongue tablets	3 years	70-80% reduction	FDA, 2025
Sublingual drops	Daily drops	3 years	60-70% reduction	ACAAI, 2025

The FDA (2025) has approved sublingual tablets for grass and ragweed allergies. The AAAAI (2025) recommends immunotherapy for patients with severe symptoms or those who do not respond to medications.

How Do I Manage Spring Allergies at Work?

Managing spring allergies at work requires proactive strategies. According to the CDC’s 2025 workplace health guidelines:

Strategy	Implementation	Effectiveness	Source
Air purifier at desk	Use HEPA filter	Reduces symptoms by 40%	EPA, 2025
Keep windows closed	Seal office windows	Reduces pollen entry by 60%	CDC, 2025
Change clothes after commute	Keep spare clothes at work	Reduces exposure by 50%	ACAAI, 2025
Use antihistamines	Take before work	Maintains focus	AAAAI, 2025

The CDC (2025) notes that 30% of allergy sufferers report reduced productivity at work. The AAAAI (2025) recommends discussing accommodations with your employer.

What Are the Best Air Purifiers for Spring Allergies?

Choosing the right air purifier can significantly reduce indoor pollen. According to the EPA’s 2025 air purifier guide:

Purifier Type	Pollen Removal	Room Size	Maintenance	Source
HEPA filter	99.97%	Up to 500 sq ft	Replace filter annually	EPA, 2025
Activated carbon	90%	Up to 300 sq ft	Replace filter every 6 months	EPA, 2025
UV-C light	95%	Up to 400 sq ft	Replace bulb annually	EPA, 2025
Ionic purifier	80%	Up to 200 sq ft	Clean plates monthly	EPA, 2025

The AAAAI (2025) recommends HEPA filters for maximum pollen removal. The EPA (2025) advises choosing a purifier with a CADR rating of at least 200 for pollen.

How Do I Prepare My Home for Spring Allergy Season?

Preparing your home can reduce indoor pollen exposure. According to the EPA’s 2025 home allergy guide:

Preparation Step	Timing	Effectiveness	Source
Clean HVAC filters	Before season	Reduces indoor pollen by 60%	EPA, 2025
Seal windows and doors	Before season	Reduces pollen entry by 70%	CDC, 2025
Remove shoes at door	Throughout season	Reduces tracked-in pollen by 80%	ACAAI, 2025
Wash bedding weekly	Throughout season	Removes accumulated pollen	AAAAI, 2025

The CDC (2025) notes that indoor pollen