How to Choose the Best Weather API in 2026
There are 31 Weather APIs in our directory. Of these, 9 require no authentication, making them ideal for quick prototyping. 12 are rated beginner-friendly.
Scores last tested: 2026-08-10
Quick Comparison: Top 10 Weather APIs
Ranked by API Score. Measured means we called a real endpoint of that API; Est. means the score is derived from metadata because the endpoint could not be called without credentials. Discontinued APIs are excluded.
| Name | API Score | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|---|
| QWeather | 87 A Est. | API Key | ✓ | ✓ | Intermediate |
| Tomorrow | 87 A Est. | API Key | ✓ | ? | Intermediate |
| Hong Kong Obervatory | 84 A Measured | No Auth | ✓ | ? | Beginner |
| weather-api | 84 A Est. | No Auth | ✓ | ✗ | Beginner |
| AQICN | 82 A Est. | API Key | ✓ | ? | Intermediate |
| ColorfulClouds | 82 A Est. | API Key | ✓ | ✓ | Intermediate |
| Oikolab | 82 A Est. | API Key | ✓ | ✓ | Intermediate |
| RainViewer | 82 A Est. | No Auth | ✓ | ? | Beginner |
| Visual Crossing | 82 A Est. | API Key | ✓ | ✓ | Beginner |
| Yandex.Weather | 79 B Est. | API Key | ✓ | ✗ | Intermediate |
Free Weather APIs (No Auth)
These APIs require no API key or signup. Start using them immediately.
7Timer!
⭐ Beginner's Pick7Timer!
AviationWeather
AviationWeather.gov is a free NOAA service that provides official aviation weather data including METARs, TAFs, PIREPs, and SIGMETs used by pilots and flight planners.
Hong Kong Obervatory
⭐ Beginner's PickThe Hong Kong Observatory Open Data API provides free access to weather observations, forecasts, earthquake reports, and climate data for Hong Kong and the surrounding region.
ODWeather
⭐ Beginner's PickODWeather is a free weather and webcam API from OceanDrivers that provides real-time marine and coastal weather data including wind, waves, and temperature.
Open-Meteo
⭐ Beginner's PickOpen-Meteo is a completely free and open-source weather API for non-commercial use that provides hourly and daily forecasts, historical data, and climate projections for any location worldwide without requiring an API key.
openSenseMap
⭐ Beginner's PickopenSenseMap is an open-source platform that aggregates real-time sensor data from community-operated personal weather stations called senseBoxes, spread across the globe.
Try It in 5 Minutes: 7Timer!
Quick implementation example using 7Timer!.
Using curl
curl "http://www.7timer.info/bin/api.pl?lon=-0.1278&lat=51.5074&product=civil&output=json"
JavaScript
const url = "http://www.7timer.info/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); New to APIs? Read our Getting Started Guide →
Frequently Asked Questions
How many Weather APIs are available?
There are 31 Weather APIs in our directory as of 2026.
Are there free Weather APIs?
Yes, 9 Weather APIs require no authentication and are completely free to use.
What is the easiest Weather API to use?
7Timer! is one of the easiest to get started with. It is rated as beginner-level and requires no authentication.
Do I need an API key for Weather APIs?
It depends. 9 APIs need no authentication, 19 require an API key, and 1 use OAuth.