(Last Updated On: April 28, 2023)

How Long Does Grass Pollen Stay in the Air?

Grass pollen is a major factor in poor air quality, particularly during the warmer months of the year. Grass pollen can typically stay airborne for up to 48 hours, depending on environmental conditions like humidity, wind speed, and temperature, and grass pollen can even remain airborne from one day to two weeks or more.

Close up green grass field

Grass Pollen and Air Quality

Wind currents can carry small particles like grass pollen for miles away from their source. On average, these allergens disperse to a radius of up to five miles before coming down; however, depending on the atmospheric conditions they could spread further.

Generally speaking, April through June are peak times for grass pollination and therefore when allergy sufferers should expect the highest concentrations of airborne allergens. During this period there is an increase in both the amount of pollen released into the environment and its ability to disperse due to warmer temperatures and increased wind speeds associated with springtime weather patterns.

Allergies and Grass Pollen Symptoms

Allergic reactions to grass pollen often manifest in sneezing, coughing, watery eyes, and an itchy throat. Some people may also experience skin rashes or hives from contact with grass pollen particles in the air.

Prolonged exposure to environmental irritants such as grass pollen can have serious consequences for your health if left untreated over time. People with allergies may experience exacerbated respiratory issues, such as asthma attacks or COPD (chronic obstructive pulmonary disease), when exposed to high levels of airborne allergens. In addition, some people may develop sinus infections due to prolonged exposure which can lead to further complications if not treated properly.

Allergy sufferers should take extra precautions when dealing with high pollen levels by avoiding outdoor activities during peak season and keeping windows closed at home whenever possible. Wearing protective gear such as face masks while outdoors can also help reduce the amount of allergen particles inhaled into the lungs.

Mowing and Grass Pollen Release

Mowing cannot create new pollen but it can cause an increase in airborne pollen levels. If there are high levels of existing pollen present, then cutting your lawn could increase your exposure levels significantly and lead to allergy symptoms such as sneezing or watery eyes. Take allergy symptoms caused by high levels of airborne allergens into consideration when mowing your lawn or planning any other outdoor activities.

Reducing Exposure Levels Indoors

During times of poor outdoor air quality, indoor air quality becomes even more important for health and well-being. Use fans or other types of mechanical ventilation, such as range hoods or exhaust fans, that can be installed over stoves and showers for proper circulation of air throughout your home.

Many third-party organizations have put HEPA filters through their paces, making them a reliable go-to choice for reducing airborne pollutants inside your home. These filters are proven to capture particles as small as .3 microns, including pollen, dust mites, mold spores, and pet dander. You can be confident that you’ll be breathing in pure, refreshing air with these top-notch air purifying systems..

Natural Remedies and Medications for Seasonal Allergies

Due to the severity of some people’s conditions, medical intervention such as OTC medications and immunotherapy may be necessary to avoid complications over time, but for those with mild cases, natural treatments may suffice.

Dietary changes such as reducing sugar intake or eliminating dairy products, drinking plenty of water throughout the day, and using saline nasal sprays can help alleviate symptoms. Additionally, drinking teas made from herbs known for their antihistamine properties can be effective. Other popular methods include consuming foods rich in vitamin C like oranges or lemons, taking supplements containing omega-3 fatty acids, and adding honey to your diet.


Is Grass Pollen Airborne?
Yes, it can spread through the air and travel long distances due to its small size. Grass pollen granules are sufficiently lightweight to remain airborne for a long time, allowing them to travel far from their origin.

How Long Does Grass Pollen Stay in the Air?
Grass pollen is typically airborne for up to 48 hours, depending on environmental conditions. Wind and rain can decrease the longevity of grass pollen in the atmosphere, whereas warm temperatures and dryness can increase it. Other sources of pollination such as trees or flowers in the vicinity may also affect how much time grass pollen remains airborne. To minimize exposure, keep windows and doors closed when possible and avoid outdoor activities during peak pollination times.


Grass pollen can be a frustrating source of air contamination for those with sensitivities, but knowing when peak pollen season is and taking precautions to reduce exposure can help manage symptoms. Stay indoors when pollen levels are high and be careful when mowing, as it can increase airborne pollen levels. Use an air purifier to improve indoor air quality. If reducing exposure isn’t enough, natural remedies and medications are available that may help lessen symptoms.

Top Pick

Alen BreatheSmart 45i
Air Purifier
$430 Buy Now

Best Air Purifiers for Allergies

Alen Breathesmart 45i $429 Buy Now
Austin Air
Healthmate Plus
Air Purifier

$855 Buy Now
Air Purifier

$900 Buy Now
Classic 605
Air Purifier

$495 Buy Now
AirMega 400
Air Purifier

$450 Buy Now