Brandwave

Open-Meteo vs WeatherAPI:Which is more popular?

In September 2026, Open-Meteo had more branded searches than WeatherAPI among weather APIs worldwide. Open-Meteo had about 41,200 branded searches, while WeatherAPI had 27,100. Open-Meteo made up 0.66% of all weather API searches we track, and WeatherAPI accounted for 0.44%. When we asked ChatGPT and Google AI Overviews about weather APIs, Open-Meteo appeared in all five answers and WeatherAPI in four. Open-Meteo was mentioned before WeatherAPI in four out of five answers.

Among weather APIs worldwide in September 2026

Who do people search for more?

Open-Meteo, about 52% more searches than WeatherAPI

Open-Meteo 41.2K searchesWeatherAPI 27.1K searches

Who does AI mention more?

Open-Meteo, mentioned in every answer we collected

Open-Meteo in 5 of 5WeatherAPI in 4 of 5

Who does AI recommend more?

Open-Meteo, named ahead of WeatherAPI in 4 of 5 answers

Open-Meteo first in 4WeatherAPI first in 1

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Top weather APIs in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Open-Meteo appeared in all five answers. WeatherAPI was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Open-Meteo was listed before WeatherAPI in four out of five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Open-Meteo1st
  2. WeatherAPI2nd
  3. OpenWeather3rd
  4. Tomorrow.io4th
  5. Visual Crossing5th
  6. AccuWeather6th

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Open-Meteo5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • WeatherAPI4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Tomorrow.io4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Visual Crossing4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • OpenWeather3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • AccuWeather1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers

See every answer about weather APIs

5 answers

Brands are shown in the order each answer named them. The survey took place in the United States on October 19, 2026.

Is Open-Meteo or WeatherAPI more popular in search?

This chart shows how often people search Google for Open-Meteo and WeatherAPI by name. Each line represents a brand's share of searches for all six weather APIs we track, month by month, from English-language searches worldwide.

Open-Meteo and WeatherAPI among weather APIs worldwide, by month

Share of searches by month for Open-Meteo, WeatherAPI. The figures are in the table below the chart.

View monthly share of searches table
MonthAccuWeatherOpen-MeteoWeatherAPIOpenWeatherTomorrow.ioVisual Crossing
Oct 202598.4%0.38%0.65%0.44%0.05%0.05%
Nov 202598%0.54%0.79%0.53%0.07%0.06%
Dec 202598.6%0.36%0.53%0.44%0.06%0.04%
Jan 202698.9%0.3%0.44%0.29%0.04%0.04%
Feb 202698%0.64%0.65%0.53%0.11%0.06%
Mar 202698.1%0.64%0.65%0.53%0.07%0.05%
Apr 202698.2%0.66%0.53%0.53%0.06%0.05%
May 202698.5%0.54%0.44%0.44%0.06%0.04%
Jun 202698.6%0.54%0.44%0.36%0.05%0.03%
Jul 202698.6%0.52%0.44%0.36%0.04%0.03%
Aug 202698.7%0.52%0.36%0.36%0.04%0.03%
Sep 202698.4%0.66%0.44%0.36%0.07%0.04%

How has the Open-Meteo and WeatherAPI comparison changed over the last 12 months?

3 findings
  • The lead changed hands once in the 12 months ending September 2026: Open-Meteo took it in April 2026.
  • Across the 12 months ending September 2026, Open-Meteo’s share of searches among weather APIs worldwide moved from 0.38% to 0.66%, and its estimated monthly branded searches moved from 23.5K to 41.2K.
  • Across the 12 months ending September 2026, WeatherAPI’s share of searches among weather APIs worldwide moved from 0.65% to 0.44%, and its estimated monthly branded searches moved from 40.5K to 27.1K.

How did search popularity change for weather APIs worldwide in September 2026?

2 changes

  1. In September 2026, WeatherAPI rose from 4th to 3rd among weather APIs worldwide.

  2. Estimated monthly branded searches for Open-Meteo worldwide rose 75.3% over 12 measured months, from 23.5K to 41.2K in September 2026.

How are branded searches counted?

3 search terms

Brandwave collects information about searches that people make online using Open-Meteo’s and WeatherAPI’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Open-Meteo

2 branded search terms

  • open meteo
  • openmeteo

WeatherAPI

1 branded search term

  • weatherapi

How the Brand Demand Index is measured

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