05/08/2026
And just like that... It's Grass Pollen season..
The Tennessee Valley is beginning the transition into grass pollen season, and after the welcome rain over the last few days, we expect grass growth to really take off across North Alabama and southern Middle Tennessee. Warmer soil temperatures combined with a stretch of 80-degree afternoons will likely send pollen counts climbing through the coming weeks. Unlike the yellow pine pollen we saw earlier this spring, grass pollen is much finer and can trigger more intense allergy symptoms including sneezing, itchy eyes, congestion, coughing, and asthma flare-ups for sensitive individuals.
Grass pollen levels are usually highest during warm, dry, breezy afternoons, especially after several sunny days in a row. Many common grasses across the Tennessee Valley — including Bermuda, Timothy, Ryegrass, and Fescue — can produce heavy pollen this time of year. The recent rain helps vegetation grow rapidly, and once sunshine returns, mowing and yard work can stir large amounts of pollen into the air.
There are a few things viewers can do to help reduce symptoms during peak grass pollen season:
Keep windows closed during the afternoon and early evening when pollen counts are highest.
Change clothes and shower after spending extended time outdoors.
Use HEPA air filters if possible inside the home.
Consider taking allergy medication before symptoms become severe, especially on warm windy days.
Limit outdoor exercise during peak pollen hours if allergies are especially bad.
For mowing, the best time is usually late evening or shortly after a rainfall when pollen levels are temporarily lower and the air is less dry. Avoid mowing during the middle of the day or early afternoon when grass pollen concentrations tend to peak. Wearing a mask and eye protection while mowing can also help reduce exposure significantly.
With temperatures trending warmer and vegetation greening up quickly across the Tennessee Valley, grass pollen will likely become one of the main allergy triggers heading deeper into May.