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World Weather Online pricing and alternatives: air quality API

World Weather Online's sitellms.txtBest air quality API in 2026: pricing compared

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33% complete: 2 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 placesWe rank 94 plans by price. OpenWeather's £370 monthly plan is the cheapest paid plan per 1,000 places: $0.00049.WeatherAPI.com, Open-Meteo and Weatherbit are the best air quality API providers in our benchmark.
Plan: Free one of World Weather Online's 3 plans
Call: GET /premium/v1/weather.ashx one of World Weather Online's 2 calls
API: Air quality API one of World Weather Online's 3 APIs

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • 2 of the 6 key fields we check. Particles, Gases.
  • Nothing to pay.
  • One call. You send q to GET /premium/v1/weather.ashx. You set aqi to "yes". The call returns the air quality at the place now.
  • Who can get it: anyone aged 16 or over. Keep data: with conditions. Use data: with conditions.

World Weather Online: air quality API alternatives

The table starts with World Weather Online's cheapest paid plan. Next come plans from other providers with the price per 1,000 places closest to World Weather Online's.

World Weather Online, $1 monthly, Pro, GET /premium/v1/weather.ashxMeteosource, $29 monthlyForeca, €3,509 yearly, Altocumulus, GET /api/v1/air-quality/forecast/hourly/{location}Open-Meteo, €99 monthly, API Professional, GET /v1/air-quality, Air quality, fullAPI Ninjas, $1,188 yearly
$ per 1,000 places$0.067$0.048$0.066$0.067$0.099
Completeness33%33%33%100%33%
Billingmonthlymonthlyyearlymonthlyyearly
Pay$1$29€3,509€99$1,188
Enough for500 calls a day20,000 calls a day5,000,000 calls a monthabout 1,666,666 calls a month1,000,000 calls a month
Freshnessunknownunknownunknownliveunknown
Who can get itanyone aged 16 or overanyoneanyoneanyoneanyone 18 or over

Every air quality API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-30.

  1. worldweatheronline.com/weather-api/api
  2. worldweatheronline.com/weather-api/api/api-t-and-c.aspx
  3. worldweatheronline.com/weather-api/api/docs/local-city-town-weather-api.aspx
  4. worldweatheronline.com/weather-api/api/free-api-terms.aspx
  5. worldweatheronline.com/weather-api/api/local-city-town-weather-api.aspx
  6. worldweatheronline.com/weather-api/api/pricing.aspx

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • US AQI, not in the answer
  • European AQI, not in the answer
  • Particles
  • Gases
  • Pollen, not in the answer
  • UV index, not in the answer
Price
$ per 1,000 places$0.00
Percall
Billingfree
Charges
Also pays forfrom the same budget: Local History API · Marine Weather API · Marine History API · Ski Weather API · Search API · Astronomy API · Time Zone API
Not found
$ per 1,000$0.00
In their words
Their pitchReal-time air pollution data including PM2.5, PM10, ozone, NO₂, SO₂, and CO concentrations for health-conscious apps and environmental monitoring solutions.
Data
Keep dataYou may cache API responses for performance optimisation subject to the following limits: current conditions data — maximum 60 minutes, forecast data — maximum 24 hours, historical data — no restriction. Caching beyond these limits or storing data beyond your subscription term constitutes a breach of these Terms and Conditions.
Use dataWorldWeatherOnline grants you a limited, non-exclusive, non-transferable right to access and use the Weather API services for your own internal business or personal purposes, subject to these Terms and Conditions and your selected subscription plan. Free API access is permitted for both commercial and non-commercial use within the stated request limits. Free API users must credit WorldWeatherOnline by name or brand logo as the source of data in all public displays. [...] You may not transfer, sublicense, resell, or redistribute the API service or raw data feeds to any third party without prior written consent from WorldWeatherOnline. Any use of the API beyond the scope of your subscription plan — including exceeding request limits or accessing endpoints not included in your tier — is prohibited and may result in account suspension. Attribution required for public display of weather data [...] Where you make weather data derived from the WorldWeatherOnline API available to your own end users — whether through a website, mobile application, API, dashboard, or any other channel — you must display a clear, conspicuous disclaimer to those end users.
Plan
Pay$0
Rate limit
Batch1
The call
You sendq, aqi "yes". Optional: num_of_days, date, tp, fx, cc, fx24, extra, includelocation, showlocaltime, showmap, lang, date_format
MethodGET
Path/premium/v1/weather.ashx
About the plan
PlanFree
Who can get itanyone aged 16 or over
The 16 fields the plan's answer can hold

time read, day, hour, US EPA index, UK DEFRA index, PM2.5 concentration, PM10 concentration, ozone concentration, nitrogen dioxide concentration, sulfur dioxide concentration, carbon monoxide concentration, area name, country, region, latitude, longitude

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