When is pollen worst in Brush?

Brush's pollen season runs in three overlapping waves: tree pollen peaks Mar–May, grass pollen May–Jul, and weed (ragweed) pollen Aug–Oct. The single worst stretch for most people is the spring tree peak and the late-summer ragweed peak; the live count at the top of this page tells you which is active today.

What's pollinating in Brush right now?

In June, grass pollen is in season in Brush — the dominant allergen you're likely reacting to right now. The live index above (when available) confirms the day's actual count; this calendar reflects the typical peak windows for Brush's climate region.

Is tree or grass pollen higher in Brush in spring?

In spring, tree pollen usually dominates in Brush — trees pollinate Mar–May, ahead of the grass peak (May–Jul). Late spring is the handoff: tree counts taper as grass climbs, so a bad April is more likely tree pollen and a bad late-May/June is more likely grass.

How do I reduce pollen exposure in Brush?

Keep windows closed and run air conditioning on recirculate during peak season; counts are highest on dry, warm, windy mornings, so time outdoor activity for late afternoon or after rain, which washes pollen out of the air. A HEPA air purifier indoors, a saline nasal rinse after being outside, showering and changing clothes before bed, and starting antihistamines before your worst season begins 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 will 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.

Brush, Colorado Pollen Count

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

Brush, CO · Pollen count right now

Grass pollen is High in Brush today

Grass: High 4/5Tomorrow: High

Today’s pollen by type

TreeOut of season
GrassHigh4/5
Weed / RagweedOut of season

Active now: Grasses.

Brush 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–Oct

Allergy relief

Zyrtec 24-Hour Allergy Relief (Cetirizine 10 mg)
A once-daily, non-drowsy oral antihistamine. Start it a couple of weeks before your worst pollen season for the best symptom control.
View on Amazon →
Flonase Allergy Relief Nasal Spray (Fluticasone)
A steroid nasal spray that targets congestion and post-nasal drip an oral pill alone often misses. Most effective used daily through peak season.
View on Amazon →
Levoit Core 300 HEPA Air Purifier
A true-HEPA purifier captures airborne pollen indoors. Run it in the bedroom on high during peak season — the air you breathe 8 hours a night matters most.
View on Amazon →
Mission Allergy Allergen-Barrier Pillow & Mattress Encasements
Tightly-woven encasements block pollen and dust-mite allergens tracked into bed on hair and clothing — a low-effort, high-leverage environmental control.
View on Amazon →
NeilMed Sinus Rinse Kit (Saline Nasal Irrigation)
A saline rinse physically flushes pollen out of the nasal passages. Use it after time outdoors during peak season to cut the allergen load before symptoms build.
View on Amazon →

Weather Story is a participant in the Amazon Associates program. As an Amazon Associate we earn from qualifying purchases — at no extra cost to you. Product picks are editorial; the links above are affiliate links.

How Brush’s pollen count works

Pollen rises in three overlapping waves through the year: trees release first, in late winter and spring; grasses peak from late spring into summer; and weeds — ragweed above all — take over from late summer into fall. The calendar above shows the typical peak window for each in Brush’s climate region, so you can see what’s likely driving your symptoms before you ever check a number.

Counts are reported on a categorical scale — None, Low, Moderate, High, and Very High. Levels run highest on warm, dry, windy mornings and fall after rain, which washes pollen out of the air. If a live count is available it appears at the top of this page; otherwise the seasonal calendar is your guide to when each allergen is in season in Brush.

Frequently asked

When is pollen worst in Brush?: Brush's pollen season runs in three overlapping waves: tree pollen peaks Mar–May, grass pollen May–Jul, and weed (ragweed) pollen Aug–Oct. The single worst stretch for most people is the spring tree peak and the late-summer ragweed peak; the live count at the top of this page tells you which is active today.
What's pollinating in Brush right now?: In June, grass pollen is in season in Brush — the dominant allergen you're likely reacting to right now. The live index above (when available) confirms the day's actual count; this calendar reflects the typical peak windows for Brush's climate region.
Is tree or grass pollen higher in Brush in spring?: In spring, tree pollen usually dominates in Brush — trees pollinate Mar–May, ahead of the grass peak (May–Jul). Late spring is the handoff: tree counts taper as grass climbs, so a bad April is more likely tree pollen and a bad late-May/June is more likely grass.
How do I reduce pollen exposure in Brush?: Keep windows closed and run air conditioning on recirculate during peak season; counts are highest on dry, warm, windy mornings, so time outdoor activity for late afternoon or after rain, which washes pollen out of the air. A HEPA air purifier indoors, a saline nasal rinse after being outside, showering and changing clothes before bed, and starting antihistamines before your worst season begins 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 will 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 Brush

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