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St. Louis air right now

GoodAQI 9

St. Louis’s five-day smoke forecast shows the current index and the clearest time ahead.

9
AQI now
1.7
PM2.5 · µg/m³
Look farther for cleaner air

Where are you?

Search covers Canada and the United States.

The better move within a 3-hour drive

Dates

Dates follow you into hotel searches. Live inventory is confirmed by the provider.

You may already have the cleanest nearby air.No meaningfully cleaner place has a verified road route within 3 hours. Widen the range or show worse air for context.

Every town is also available in the ranked list.
St. Louis Clean · PM2.5 0–5 Good · 5–9 Elevated · 9–15 Polluted · 15–35 Unhealthy · 35–55 Severe · 55+
Top pick
Hermann
Cel-shaded illustration of Hermann
AQI 21
#1Hermann~1 h 45 min drive

Missouri· Good

German wine-country town in the wooded Missouri River hills west of St. Louis, a countryside reset with inns and B&Bs.

Worse air than home. Don't bother.

PM2.5 is 3.8 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 3.8/22 × 7 = 1.2 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

Air is currently worse here than in St. Louis

124% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 6:12 p.m. EDT

PM2.5 is estimated for this town.

Directions
Still smoky
Saint Charles
Cel-shaded illustration of Saint Charles
AQI 40
#2Saint CharlesChecking road route

Missouri· Good

Missouri community with lodging and a separate live air reading for regional smoke comparisons.

Worse air than home. Don't bother.

PM2.5 is 7.2 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 7.2/22 × 7 = 2.3 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

Air is currently worse here than in St. Louis

324% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 5:00 p.m. EDT

PM2.5 from the Ladue monitor.

Directions
Still smoky
Springfield
Cel-shaded illustration of Springfield
AQI 70
#3Springfield~1 h 55 min drive

Illinois· Moderate

Illinois capital with extensive lodging northeast of St. Louis.

Worse air than home. Don't bother.

PM2.5 is 19.1 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 19.1/22 × 7 = 6.1 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

Air is currently worse here than in St. Louis

1024% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 5:00 p.m. EDT

PM2.5 from the Springfield Ag monitor.

Directions
Still smoky
Webster Groves
Cel-shaded illustration of Webster Groves
AQI unavailable
#4Webster GrovesChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Bel-Ridge
Cel-shaded illustration of Bel-Ridge
AQI unavailable
#5Bel-RidgeChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Affton
Cel-shaded illustration of Affton
AQI unavailable
#6AfftonChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Caseyville
Cel-shaded illustration of Caseyville
AQI unavailable
#7CaseyvilleChecking road route

Illinois

Illinois community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Pontoon Beach
Cel-shaded illustration of Pontoon Beach
AQI unavailable
#8Pontoon BeachChecking road route

Illinois

Illinois community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Ladue
Cel-shaded illustration of Ladue
AQI unavailable
#9LadueChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Ferguson
Cel-shaded illustration of Ferguson
AQI unavailable
#10FergusonChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Overland
Cel-shaded illustration of Overland
AQI unavailable
#11OverlandChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Mehlville
Cel-shaded illustration of Mehlville
AQI unavailable
#12MehlvilleChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Van Buren
Cel-shaded illustration of Van Buren
AQI 28
#13Van BurenChecking road route

Missouri· Good

Ozark National Scenic Riverways town on the Current River, deep in forested river-canyon country.

Worse air than home. Don't bother.

PM2.5 is 5 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 5/22 × 7 = 1.6 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →

Air is currently worse here than in St. Louis

194% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 6:27 p.m. EDT

PM2.5 is estimated for this town.

Directions
Still smoky
Benton
Cel-shaded illustration of Benton
AQI unavailable
#14BentonChecking road route

Illinois

Illinois community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Carbondale
Cel-shaded illustration of Carbondale
AQI unavailable
#15CarbondaleChecking road route

Illinois

Illinois community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Altamont
Cel-shaded illustration of Altamont
AQI unavailable
#16AltamontChecking road route

Illinois

Illinois community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
Vandalia
Cel-shaded illustration of Vandalia
AQI unavailable
#17VandaliaChecking road route

Missouri

Missouri community with a cached air reading available when it appears in a nearby escape search.

Air comparison pending.

Air comparison pendingChecking trip easeChecking nearby staysChecking today's weather

PM2.5 is modelled for this town.

Directions
Still smoky
South Haven
Cel-shaded illustration of South Haven
AQI 6
#18South HavenChecking road route

Michigan· Good

Harbour beach town on Lake Michigan's southwest shore, swept by onshore lake air, with waterfront hotels and rentals.

About the same air — still smoky.

PM2.5 is 1.1 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.1/22 × 7 = 0.4 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
35% cleaner airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 6:12 p.m. EDT

PM2.5 is estimated for this town.

Directions
Still smoky
Fort Wayne
Cel-shaded illustration of Fort Wayne
AQI 9
#19Fort Wayne~7 h drive

Indiana· Good

A major Indiana city with broad lodging options and live air-quality readings for comparison when smoke shifts across the region.

About the same air — still smoky.

PM2.5 is 1.7 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.7/22 × 7 = 0.5 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
0% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 6:12 p.m. EDT

PM2.5 is estimated for this town.

Directions
Still smoky
Auburn
Cel-shaded illustration of Auburn
AQI 9
#20AuburnChecking road route

Indiana· Good

Indiana community with lodging and a separate live air reading for regional smoke comparisons.

About the same air — still smoky.

PM2.5 is 1.7 µg/m³ here vs 1.7 back home.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at these levels: 1.7/22 × 7 = 0.5 here; 1.7/22 × 7 = 0.5 at home.A long-term health-risk equivalence, not literal smoking.See how we work it out →
0% worse airChecking trip easeChecking nearby staysChecking today's weather

Observed Aug 23, 6:27 p.m. EDT

PM2.5 is estimated for this town.

Directions
Bad week ahead? Check the 7-day outlook — if it won’t clear, book the trip

7-day outlook

Plan the next seven days

Pick a day, or compare the whole week. Weather is forecast; air quality is the latest available reading.

Loading the week…

Finding the nicest days and reachable cities.

Observed Aug 23, 5:00 p.m. EDTLast scan Aug 23, 6:27 p.m. EDT · 49 min ago

Why live rankings? Smoke plumes are patchy and shift with the wind, so no direction is reliably cleaner. This list is recalculated from live PM2.5 every hour — and if everything nearby is smoky, it says so.

How we work this out →

Browse all 200 cities by province & state →

More air-quality pages in Missouri →
Kansas City air qualitySpringfield air quality
Air quality in nearby cities →
Peoria air qualityIndianapolis air qualityMemphis air qualityLouisville air qualityNashville air qualityRockford air qualityChicago air qualityDes Moines air qualityLittle Rock air qualityTopeka air qualityCincinnati air qualityMadison air quality

What this means · St. Louis

Good

AQI 9

AQI = Air Quality Index

Typical person. Air quality is satisfactory for most outdoor plans.

Kids, seniors, heart or lung conditions. Unusually sensitive people can still enjoy the outdoors.

The AQI on this page follows fine particles (PM2.5). Particles here are 1.7 µg/m³ (Natural), so the headline and the particle scale below tell the same story.

Act two · Fine particles only

Where PM2.5 lands

This bar is smoke and fine particles (PM2.5) only. Left is cleaner air; right is heavier particle pollution. Today's particles sit in Natural.

1.7 µg/m³
Clean · 0Smoky · 40Severe · 80+

Act three · Particle ladder

What each PM2.5 rung feels like

  • 0–3µg/m³Natural. About as clean as outdoor air realistically gets.
  • 3–5µg/m³Clean. Crisp, destination-worthy air.
  • 5–9µg/m³Good. Clean city air; most people will not notice anything today.
  • 9–15µg/m³Elevated. Usually no big deal today; sensitive lungs may notice hard exercise.
  • 15–35µg/m³Polluted. Smoke or traffic pollution is now worth acting on.
  • 35–55µg/m³Unhealthy. Symptoms become more likely, especially with asthma or heart disease.
  • 55+µg/m³Severe. Everyone should reduce exposure and clean the indoor air.

Act four · Felt number

Cigarettes a week

A secondary feel for the particle load only — not a medical claim, and not a substitute for AQI.

0.5/wk

What is PM2.5?

Fine particles about 30× thinner than a human hair — small enough to slip through your lungs and into your bloodstream. We measure them inµg/m³: micrograms of particle mass in a cubic metre of air.

The math

PM2.5 here is 1.7 µg/m³.Berkeley Earth: 22 µg/m³ for 24 h ≈ 1 cigarette.A week at this level: 1.7/22 × 7 = 0.5 cigarettes.A long-term health-risk equivalence, not literal smoking.See how we work it out →
See the full method →