When is pollen worst in Sloan?

The late-summer ragweed run is the headline in Sloan: weed pollen peaks Aug–Nov, the longest and most punishing window of the year here. Tree pollen comes first (Mar–May) and grass bridges the gap (May–Jul), but it's the ragweed stretch that floors most sufferers. Currently, grass pollen is what's driving counts this month.

What's in the air in Sloan right now?

In June, grass pollen is in season in Sloan — the dominant allergen you're likely reacting to right now. A live count, when available, confirms the day's actual reading; this reflects the typical peak windows for Sloan's continental Plains climate.

Is tree or grass pollen higher in Sloan in spring?

In spring, tree pollen leads in Sloan — trees pollinate Mar–May, ahead of grass (May–Jul). The handoff is the tail of the tree window: tree counts taper as grass climbs, so an early-spring flare is more likely tree pollen and a late-spring one more likely grass.

What makes Sloan's pollen season distinctive?

Sloan sits in the continental Plains zone, which means the country's worst ragweed — the continental Plains run a long, severe late-summer-into-fall weed season on top of the usual tree and grass peaks. That shapes when symptoms hit and which allergen to watch.

How do I reduce pollen exposure in Sloan?

Through Sloan's peak windows (tree Mar–May, grass May–Jul, ragweed Aug–Nov), keep windows shut and run AC on recirculate; counts run highest on dry, warm, windy mornings, so push outdoor activity to late afternoon or just after rain, which clears pollen from the air. A HEPA purifier indoors, a saline rinse after being outside, showering before bed, and starting antihistamines a week or two before your worst local window all measurably cut symptoms.

What pollen index counts as high?

Pollen is reported on a categorical scale — None, Low, Moderate, High, and Very High. "High" and above means most allergy sufferers notice symptoms even with brief outdoor exposure, and sensitized people should limit time outside and pre-medicate. "Low" to "Moderate" usually only affects highly sensitive individuals.

Sloan, Iowa Pollen Count

Sloan pollen count and allergy forecast — tree, grass, and ragweed seasons and what’s pollinating now

Sloan, IA · Pollen season

In June, grass pollen is in season in Sloan — the dominant allergen you're likely reacting to right now.

Based on the seasonal pollen calendar for this region.

Pollen by type this season

TreeOut of seasonpeaks Mar–May
GrassIn seasonpeaks May–Jul
Weed / RagweedOut of seasonpeaks Aug–Nov

Sloan pollen calendar

Typical peak months for each pollen type in this climate region. The highlighted column is the current month.

JFMAMJJASOND

TreeMar–May

GrassMay–Jul

WeedAug–Nov

How Sloan’s pollen count works

The calendar above is tuned to Sloan’s continental Plains climate, not a national average: tree pollen peaks Mar–May, grass May–Jul, and ragweed Aug–Nov here. Those windows are why grass pollen is the one in season in Sloan right now.

No live count is wired up for Sloan today, so the seasonal calendar above is your guide to which allergen is in season. Counts run highest on warm, dry, windy mornings and drop after rain, which washes pollen out of the air — reported on the None / Low / Moderate / High / Very High scale.

Frequently asked

When is pollen worst in Sloan?: The late-summer ragweed run is the headline in Sloan: weed pollen peaks Aug–Nov, the longest and most punishing window of the year here. Tree pollen comes first (Mar–May) and grass bridges the gap (May–Jul), but it's the ragweed stretch that floors most sufferers. Currently, grass pollen is what's driving counts this month.
What's in the air in Sloan right now?: In June, grass pollen is in season in Sloan — the dominant allergen you're likely reacting to right now. A live count, when available, confirms the day's actual reading; this reflects the typical peak windows for Sloan's continental Plains climate.
Is tree or grass pollen higher in Sloan in spring?: In spring, tree pollen leads in Sloan — trees pollinate Mar–May, ahead of grass (May–Jul). The handoff is the tail of the tree window: tree counts taper as grass climbs, so an early-spring flare is more likely tree pollen and a late-spring one more likely grass.
What makes Sloan's pollen season distinctive?: Sloan sits in the continental Plains zone, which means the country's worst ragweed — the continental Plains run a long, severe late-summer-into-fall weed season on top of the usual tree and grass peaks. That shapes when symptoms hit and which allergen to watch.
How do I reduce pollen exposure in Sloan?: Through Sloan's peak windows (tree Mar–May, grass May–Jul, ragweed Aug–Nov), keep windows shut and run AC on recirculate; counts run highest on dry, warm, windy mornings, so push outdoor activity to late afternoon or just after rain, which clears pollen from the air. A HEPA purifier indoors, a saline rinse after being outside, showering before bed, and starting antihistamines a week or two before your worst local window all measurably cut symptoms.
What pollen index counts as high?: Pollen is reported on a categorical scale — None, Low, Moderate, High, and Very High. "High" and above means most allergy sufferers notice symptoms even with brief outdoor exposure, and sensitized people should limit time outside and pre-medicate. "Low" to "Moderate" usually only affects highly sensitive individuals.

More for Sloan

See the full Sloan, IA weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality.

Pollen by type this season

Sloan pollen calendar

How Sloan’s pollen count works

Frequently asked

More for Sloan

Pollen counts nearby in Iowa