Dr. Aimee Leyton Speck
University of Michigan Health
Ann Arbor, MI · Southeast Michigan hardwood and campus corridor
Ann Arbor, MI Pollen Count Today
Ann Arbor allergy risk is shaped by southeast Michigan warmups, mature hardwood canopy, campus landscaping, the Huron River corridor, parks, lawns, grass pollen, and late-season ragweed.
Today's pollen count in Ann Arbor
Today in Ann Arbor, Michigan, the forecasted pollen level is moderate with an allergy index of 3. The primary allergen is Elm. Use the forecast below to see whether conditions are likely to rise, ease, or stay steady over the next few days.
AllergyAva shows forecasted pollen levels and allergy risk estimates for Ann Arbor. Actual exposure can vary by neighborhood, weather, and time outdoors.
Pollen Level
Moderate Risk3
Google UPI (0–5)
Primary Allergen
Elm
Consider taking antihistamines before heading outside. Keep windows closed.
60°
Temp
94%
Humidity
5
Wind mph
Pollen: Includes data from Google Maps · Weather: Includes data from Google Maps
5-Day Pollen Forecast
Best day this week
Today - Moderate
Worst day this week
Fri - High
Today
84°/61°
3
Moderate
Tree3
Grass0
Weed0
Tomorrow
84°/61°
3
Moderate
Tree2
Grass0
Weed3
Thu
87°/63°
4
High
Tree3
Grass0
Weed4
Fri
87°/63°
4
High
Tree3
Grass0
Weed4
Sat
84°/61°
3
Moderate
Tree2
Grass0
Weed3
None
Very Low
Low
Moderate
High
Very High
Allergen Breakdown
Elm
Moderate
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Weather-allergy synergy
Why conditions feel this way today
Today in Ann Arbor, 94% humidity may keep irritation noticeable, especially if elm pollen overlaps with damp-weather mold sensitivity.
- Temp
- 60°F
- Humidity
- 94%
- Wind
- 5 mph
- Rain chance
- 0%
24-hour allergy risk curve
Best outdoor window today in Ann Arbor
Better
Short outdoor plans are more reasonable today, especially away from active vegetation.
Avoid
Extended exposure near mowing, leaf litter, or heavy tree cover if those trigger symptoms.
Extra caution
Check tomorrow's trend before planning longer outdoor time.
Data Confidence & Sources
Pollen Forecast
- Source
- Includes data from Google Maps · Pollen API (1×1 km grid resolution)
- Last Daily Update
Pollen models recalculate once daily
Weather Conditions
- Source
- Includes data from Google Maps · Weather API
- Last Refresh
Weather data updates every 15–30 minutes
Local pollen exposure can vary by micro-vegetation, wind gusts, structural barriers, and time spent outdoors.
Check pollen in another city or ZIP code
Local allergy care
Allergists near Ann Arbor, MI
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.
Dr. Anna Kovalszki
University of Michigan Health
Dr. Cem Akin
University of Michigan Health
Showing 3 of 17 published allergist profiles in this area.
City allergy guide
Ann Arbor allergy profile
Today's risk+
Ann Arbor has a strongly seasonal Great Lakes-region allergy pattern, with spring tree pollen from maple, oak, birch, cottonwood, poplar, and other hardwoods followed by grass pollen around lawns, parks, fields, and campus landscapes.
The Huron River corridor, wooded neighborhoods, parks, and open spaces can make exposure feel different across daily routines. Ragweed becomes the main late-season concern in August and September and can remain active until a hard frost.
Ann Arbor's guide sections below focus on recurring local exposure patterns. Today's moderate Elm reading is the live risk signal, while the seasonal and neighborhood notes explain where exposure can still differ during normal routines.
Seasonal guide+
December-February
Lowest outdoor pollen season
Outdoor pollen is generally low, while indoor dust, pets, dry heat, and mold can still trigger symptoms.
Late March-May
Spring tree pollen
Maple, oak, birch, poplar, cottonwood, ash, and other wind-pollinated trees often drive spring allergy pressure.
May-July
Grass pollen season
Lawns, parks, roadsides, athletic fields, and open land can raise grass exposure in late spring and early summer.
August-October
Ragweed until hard frost
Common and giant ragweed become important late-season sources, especially in warm, dry, windy weather.
Treatment and planning tips+
Campus walks
Plan long walks across quads, lawns, and tree-lined routes for lower-risk windows during tree and grass peaks.
River trails
Use caution near wooded river paths after rain, when mold irritation can become more noticeable.
Windows and dorms
Keep windows closed during high-pollen periods and use filtration where possible in bedrooms, apartments, or offices.
Ann Arbor seasonal pollen calendar
Lowest outdoor pollen season
December-February
Outdoor pollen is generally low, while indoor dust, pets, dry heat, and mold can still trigger symptoms.
Spring tree pollen
Late March-May
Maple, oak, birch, poplar, cottonwood, ash, and other wind-pollinated trees often drive spring allergy pressure.
Grass pollen season
May-July
Lawns, parks, roadsides, athletic fields, and open land can raise grass exposure in late spring and early summer.
Ragweed until hard frost
August-October
Common and giant ragweed become important late-season sources, especially in warm, dry, windy weather.
Common pollen triggers around Ann Arbor
| Trigger | Typical season | What to know |
|---|---|---|
| Tree pollen | Spring | Often drives early-season symptoms |
| Grass pollen | Late spring to summer | Can rise around lawns, parks, and open areas |
| Ragweed/weed pollen | Late summer to fall | Major fall allergy trigger |
| Mold spores | Varies | Often affected by moisture and decaying leaves |
Local exposure factors
Ann Arbor's southeast Michigan allergy factors
These local factors explain recurring exposure differences around Ann Arbor; the current index, primary allergen, and weather cards above remain the canonical source for today's live reading.
Mature hardwood canopy
Maple, oak, birch, cottonwood, poplar, and other trees around neighborhoods and parks can drive spring symptoms.
Campus and city landscaping
Lawns, quads, athletic fields, and planted areas can increase grass and tree exposure during active seasons.
Huron River corridor
River-adjacent humidity, trails, and wooded edges can affect pollen settling and mold irritation after damp weather.
Late-season ragweed
Open lots, roadsides, fields, and disturbed land across southeast Michigan can support ragweed until frost.
Frequently asked questions about pollen in Ann Arbor
What is the pollen count in Ann Arbor today?
Today in Ann Arbor, Michigan, the pollen level is moderate with an allergy index of 3. The main allergen to watch is Elm.
Why can Ann Arbor pollen differ from Detroit?
Ann Arbor has different tree canopy, campus landscapes, parks, river corridors, and local wind patterns. Those factors can shift pollen release and exposure even within southeast Michigan.
What months are worst for allergies in Ann Arbor?
Late March through May is usually tree pollen season, May through July is grass pollen season, and August through October is the usual ragweed period until hard frost.
Which trees affect Ann Arbor allergies in spring?
Maple, oak, birch, poplar, cottonwood, ash, and other wind-pollinated trees can contribute during spring warmups.
Can Ann Arbor river trails worsen allergies?
They can during active seasons. River trails and wooded edges may combine tree pollen, grasses, humidity, and mold irritation after wet weather.