APIbenchmarks

Category report · 7 providers evaluated

Best Weather APIs

Weather APIs span legacy meteorological brands, developer-first freemium services, and a new wave of high-resolution forecast platforms. The category splits cleanly on three axes: docs/DX quality, proven reliability at scale (published SLAs + status history), and how frictionless it is to get a working key. Incumbents like AccuWeather carry brand and data depth but gate access behind trials and tiers; challengers like Open-Meteo and WeatherAPI.com win on instant self-serve access and generous free tiers; Tomorrow.io leads on modern docs and proprietary high-res data. Compare on free-tier generosity, signup friction, SDK breadth, and whether a documented 99.9%+ SLA backs production use.

OpenWeather logo
Highest rated
OpenWeather

Ubiquitous developer weather API

84.6
ABI
B
VerdictWhat is the best weather API?The short answer, plus which provider wins on each axis.Read the verdict →

What is the best Weather API?

#ProviderDocumentationReliabilityEcosystemAccessibilityABIFree
1OpenWeather logoOpenWeatherOpenWeather8082908884.6BYes
2Tomorrow.io logoTomorrow.ioTomorrow.io8885748282.6BYes
3WeatherAPI.com logoWeatherAPI.comWeatherAPI.com8074789280.4BYes
4Open-Meteo logoOpen-MeteoOpen-Meteo8266769679.3BYes
5Visual Crossing logoVisual CrossingVisual Crossing Corporation7874669076.4BYes
6AccuWeather logoAccuWeatherAccuWeather7284706272.5CYes
7Weatherbit logoWeatherbitWeatherbit.io7470648071.7CYes

Table 1. Best Weather APIs ranked by the APIbenchmarks Index. Specification columns are vendor-stated; ABI is computed per the published methodology.

Composite scores

OpenWeather
84.6
Tomorrow.io
82.6
WeatherAPI.com
80.4
Open-Meteo
79.3
Visual Crossing
76.4
AccuWeather
72.5
Weatherbit
71.7
Scale 0–100. Highest in category: 84.6.

Figure 1. APIbenchmarks Index for Weather APIs, bar length proportional to composite score; colour encodes letter grade.

Provider scorecards

OpenWeather logo
1. OpenWeatherBABI 84.6 · Strong

The most widely adopted weather API, with a huge free tier, the One Call product, and enormous community/tutorial presence.

Documentation & DX
80
Reliability
82
Ecosystem & SDKs
90
Accessibility
88
Tomorrow.io logo
2. Tomorrow.ioBABI 82.6 · Strong

Modern weather-intelligence platform with proprietary high-resolution forecasting and 60+ data layers, marketed at 99.9% uptime.

Documentation & DX
88
Reliability
85
Ecosystem & SDKs
74
Accessibility
82
WeatherAPI.com logo
3. WeatherAPI.comBABI 80.4 · Strong

Developer-first freemium service with a generous 1M-call free tier, instant key, and SDKs across popular languages on GitHub.

Documentation & DX
80
Reliability
74
Ecosystem & SDKs
78
Accessibility
92
Open-Meteo logo
4. Open-MeteoBABI 79.3 · Strong

Open-source, key-free weather API beloved by developers; free for non-commercial use with no signup, paid reserved instances for production.

Documentation & DX
82
Reliability
66
Ecosystem & SDKs
76
Accessibility
96
Visual Crossing logo
5. Visual CrossingBABI 76.4 · Strong

Records-based metered API strong on historical and timeline data, with a simple per-record pricing model and analyst-friendly tooling.

Documentation & DX
78
Reliability
74
Ecosystem & SDKs
66
Accessibility
90
AccuWeather logo
6. AccuWeatherCABI 72.5 · Solid

Legacy meteorological brand with deep data (MinuteCast, severe alerts) but trial-and-tier access via an Apigee-backed developer portal.

Documentation & DX
72
Reliability
84
Ecosystem & SDKs
70
Accessibility
62
Weatherbit logo
7. WeatherbitCABI 71.7 · Solid

Mid-market API covering forecasts, history, air quality, agriculture and energy, with extensive docs and a limited always-free tier.

Documentation & DX
74
Reliability
70
Ecosystem & SDKs
64
Accessibility
80

Frequently asked questions

What is the best Weather API?
By the APIbenchmarks Index, OpenWeather rates highest (ABI 84.6, grade B). Ubiquitous developer weather API The ABI weights documentation, reliability, ecosystem, and accessibility; price is reported separately, so the right pick still depends on your budget and workload.
Which weather APIs have a free tier?
OpenWeather, Tomorrow.io, WeatherAPI.com, Open-Meteo, Visual Crossing, AccuWeather, Weatherbit offer a free tier or trial credits.
How is the APIbenchmarks Index calculated?
The ABI is a weighted composite of four dimensions scored on absolute reference scales: documentation & DX (30%), reliability (25%), ecosystem & SDKs (25%), and accessibility (20%). Price is excluded from the composite because price units are not comparable across categories. The full formula is on the methodology page.

Popular comparisons

OpenWeather vs Tomorrow.ioOpenWeather vs WeatherAPI.comOpenWeather vs Open-MeteoTomorrow.io vs WeatherAPI.comTomorrow.io vs Open-MeteoWeatherAPI.com vs Open-Meteo

References

  1. https://openweathermap.org/price
  2. https://openweathermap.org/full-price
  3. https://openweathermap.org/api/one-call-3
  4. https://openweathermap.org/faq
  5. https://openweather.co.uk/pricing-corp
  6. https://github.com/csparpa/pyowm
  7. https://medium.com/@fallen.snitch/review-on-free-openweather-api-and-usage-what-problem-i-could-have-910b394c45e4
  8. https://www.visualcrossing.com/resources/blog/best-weather-api-for-2025/
  9. https://data.cheap/solutions/openweather-api
  10. https://www.tomorrow.io/weather-api/
  11. https://support.tomorrow.io/hc/en-us/articles/23554984091156-Tomorrow-io-Pricing-Overview
  12. https://support.tomorrow.io/hc/en-us/articles/20273728362644-Free-API-Plan-Rate-Limits
  13. https://docs.tomorrow.io/reference/welcome
  14. https://github.com/tomorrow-io-API
  15. https://www.tomorrow.io/blog/top-weather-apis/
  16. https://appsupports.co/1443325509/tomorrow-io-weather-forecast/negative-reviews
  17. https://www.trustpilot.com/review/tomorrow.io
  18. https://www.weatherapi.com/pricing.aspx
  19. https://www.weatherapi.com/docs/
  20. https://status.weatherapi.com/
  21. https://github.com/weatherapicom/
  22. https://www.g2.com/products/weather-api/reviews
  23. https://github.com/monicahq/monica/issues/6288
  24. https://myplumberpros.com/blog/weatherapi-com-accuracy-reliability-and
  25. https://open-meteo.com/
  26. https://open-meteo.com/en/pricing
  27. https://open-meteo.com/en/features
  28. https://open-meteo.com/en/docs
  29. https://openmeteo.substack.com/p/api-subscriptions-for-commercial
  30. https://github.com/open-meteo/open-meteo
  31. https://registry.opendata.aws/open-meteo/
  32. https://news.ycombinator.com/item?id=28499910
  33. https://news.ycombinator.com/item?id=28506606
  34. https://www.visualcrossing.com/weather-data-pricing/
  35. https://www.visualcrossing.com/resources/blog/what-will-my-weather-data-cost/
  36. https://www.visualcrossing.com/weather-api/
  37. https://www.visualcrossing.com/resources/documentation/weather-api/timeline-weather-api/
  38. https://github.com/visualcrossing/WeatherApi
  39. https://www.crawlerguys.com/visual-crossing-weather-api-review/
  40. https://www.xweather.com/blog/top-weather-apis-for-production-2026
  41. https://www.visualcrossing.com/resources/blog/replacing-the-openweathermap-api-with-visual-crossing-weather/
  42. https://developer.accuweather.com/pricing
  43. https://developer.accuweather.com/faq
  44. https://developer.accuweather.com/documentation/overview
  45. https://news.ycombinator.com/item?id=44663003
  46. https://www.saashub.com/compare-openweathermap-vs-accuweather
  47. https://www.accuweather.com/en/press/latest-study-of-120-million-forecasts-proves-accuweather-forecasts-are-most-accurate/662380
  48. https://github.com/bieniu/accuweather
  49. https://statusgator.com/services/accuweather/developer-portal-api
  50. https://cloud.google.com/blog/products/api-management/apigee-accuweather-bringing-developers-access-to-industry-leading-weather-apis
  51. https://www.weatherbit.io/pricing
  52. https://www.weatherbit.io/api
  53. https://www.weatherbit.io/api/weather-forecast-api
  54. https://www.weatherbit.io/api/historical-weather-api
  55. https://help.weatherbit.io/faq/how-reliable-is-the-weatherbit-api/
  56. https://help.weatherbit.io/topic/subscriptions-and-access/
  57. https://github.com/weatherbit/weatherbit-python