
Dr. Aaron Ver Heul
WashU Medicine Physicians
Check today's pollen count by city in Missouri. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.
Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.
Pollen levels in Missouri can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Kansas City, St. Louis, Springfield, Columbia, Independence, Lee's Summit.
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Local allergy care
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.

WashU Medicine Physicians

Children's Mercy Broadway Allergy Clinic

SSM Health Cardinal Glennon Pediatric Allergy & Immunology

WashU Medicine Physicians - St. Louis Children’s Hospital

WashU Medicine Physicians - St. Louis Children’s Hospital

The University of Kansas Health System - Englewood Center
Showing 6 of 45 published allergist profiles in this area.
Missouri allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.
Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.
Comparing nearby states can help you understand regional allergy shifts, seasonal pollen timing, and conditions that may affect travel or outdoor plans.
Missouri allergy conditions can differ between Kansas City, St. Louis, and other areas because of regional weather systems, urban vegetation, and seasonal timing. People searching for a Missouri pollen forecast often want to compare east-west differences rather than treat the entire state as one pollen zone.
Tree pollen, grass pollen, and weed pollen can all play major roles through the year in Missouri. Humidity, storms, and changing wind patterns may shift allergen levels quickly, which is why city-level pollen tracking can be useful for both residents and travelers.
A mild winter spell can trigger early pollen release from eastern red cedar and other early trees. In colder years, meaningful tree pollen may not arrive until March, which is why Missouri’s starting date varies so much.
Ragweed usually appears during the second half of August and is often strongest around Labor Day and through September. Dry, windy conditions help its lightweight pollen travel, while frost eventually ends the season.
Not necessarily. The two metros may be under different weather systems and contain different mixes of trees, lawns, fields, and disturbed land. A front crossing western Missouri may reach St. Louis hours later with different rain and wind conditions.
Mowing can disturb grass pollen already on plants or surfaces along with dust, mold spores, and small plant particles. Those exposures may irritate the nose, eyes, or airways even when the broader city pollen forecast is low.
Today's statewide signal
Warm spells, cold fronts, thunderstorms, and long stretches of wind can change Missouri’s pollen picture within days. Compare conditions from Kansas City to St. Louis, Columbia, and Springfield to see which allergen is leading locally.
Data updates regularly to reflect current conditions across Missouri cities.
Highest city index now
St. Louis
Ragweed · Very High
5
Live city comparison
Sort Missouri cities by pollen index, temperature, or trend. Select a city for its full local forecast.
| Main allergen | Weather context | ||||
|---|---|---|---|---|---|
| St. Louis | 5Very High | Ragweed | Falling Forecast eases toward high conditions tomorrow. | 63°F | Partly sunny Watch ragweed levels and limit long outdoor exposure during peak hours. |
| St. Charles | 5Very High | Ragweed | Falling Forecast eases toward high conditions tomorrow. | 63°F | Partly sunny 12 mph wind can disperse ragweed pollen quickly today. |
| Kansas City | 4High | Ragweed | Falling Forecast eases toward moderate conditions tomorrow. | 64°F | Partly sunny Watch ragweed levels and limit long outdoor exposure during peak hours. |
| Springfield | 4High | Ragweed | Falling Forecast eases toward moderate conditions tomorrow. | 64°F | Partly sunny 13 mph wind can disperse ragweed pollen quickly today. |
| Columbia | 4High | Ragweed | Falling Forecast eases toward very low conditions tomorrow. | 64°F | Humid 14 mph wind can disperse ragweed pollen quickly today. |
| Independence | 4High | Ragweed | Falling Forecast eases toward moderate conditions tomorrow. | 64°F | Partly sunny Watch ragweed levels and limit long outdoor exposure during peak hours. |
| O'Fallon | 3Moderate | Ragweed | Rising Forecast moves toward high conditions tomorrow. | 63°F | Humid Humid air may keep ragweed and outdoor mold irritation active. |
| Lee's Summit | 1Very Low | Ragweed | Rising Forecast moves toward high conditions tomorrow. | 64°F | Partly sunny Outdoor pollen exposure looks limited for most people today. |
Ragweed is the main allergen
Pollen index
5
Trend
Falling
Watch ragweed levels and limit long outdoor exposure during peak hours.
Ragweed is the main allergen
Pollen index
5
Trend
Falling
12 mph wind can disperse ragweed pollen quickly today.
Ragweed is the main allergen
Pollen index
4
Trend
Falling
Watch ragweed levels and limit long outdoor exposure during peak hours.
Ragweed is the main allergen
Pollen index
4
Trend
Falling
13 mph wind can disperse ragweed pollen quickly today.
Ragweed is the main allergen
Pollen index
4
Trend
Falling
14 mph wind can disperse ragweed pollen quickly today.
Ragweed is the main allergen
Pollen index
4
Trend
Falling
Watch ragweed levels and limit long outdoor exposure during peak hours.
Ragweed is the main allergen
Pollen index
3
Trend
Rising
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
1
Trend
Rising
Outdoor pollen exposure looks limited for most people today.
Regional allergy forecast
The Kansas City metro sits where wooded neighbourhoods meet prairie, pasture, and open suburban land. Cedar and hardwood pollen begin the season, grasses follow, and ragweed produces a pronounced late-summer peak.
Columbia is surrounded by rolling farmland, pasture, and oak-hickory woodland. Spring tree pollen overlaps with grasses from lawns and fields before ragweed becomes the dominant fall concern.
Springfield’s Ozark setting includes extensive oak-hickory woodland, lawns, and fescue pasture. Tree pollen can be substantial in spring, followed by grass and weed exposure across the warmer months.
Mature city trees, wooded suburbs, parks, and open land along the expanding metro corridor create several pollen sources. Oak and hickory lead spring before grasses and ragweed shape summer and fall.
State-specific pollen calendar
January to May
Eastern red cedar may release pollen during winter warm spells. Oak, hickory, walnut, ash, maple, and other trees follow as spring becomes established.
May to July
Fescue, Timothy, Bermuda, Johnson grass, and other grasses contribute across lawns, pastures, roadsides, and open land.
Mid-August to October
Ragweed begins appearing in mid to late August and often peaks around Labor Day. Its pollen can remain active until frost.
Wet periods and fall leaf decay
Mold spores are present year-round, but damp vegetation, storm moisture, and decomposing autumn leaves can increase exposure for sensitive people.
Weather-pollen correlation
Wind can disperse pollen, rain can temporarily wash particles down, and humidity can increase mold irritation. The city table combines pollen and weather signals so users can compare outdoor risk without opening every city page.