DWD API
Weather
API of the German Weather Service (DWD): weather data, data from specific weather stations, warnings (local, coast, sea, alps)
No keyCORSHTTPS
Free Weather APIs
Forecasts, current conditions, historical climate data and severe weather alerts.
64 listed · 19 need no key · 23 work in the browser
Meteorologisk Institutt
Weather
Weather and climate data
No keyCORSHTTPS
Open-Meteo Ensemble
Weather
Weather ensemble forecasts from multiple models
No keyCORSHTTPS
openSenseMap
Weather
Data from Personal Weather Stations called senseBoxes
No keyCORSHTTPS
Pirate Weather
Weather
Free weather API with forecast data similar to Dark Sky
No keyCORSHTTPS
US Weather
Weather
Weather forecasts and alerts from the US National Weather Service
No keyCORSHTTPS
wttr.in
Weather
Weather in your terminal, supports JSON output
No keyCORSHTTPS
7Timer!
Weather
The 7Timer Weather API provides global numerical weather forecasts derived from high-resolution models. Users can access weather data in graphical or machine-readable formats without needing an API key, enabling programmatic access to various meteorological elements.
No keyHTTPS
AviationWeather
Weather
NOAA aviation weather forecasts and observations
No keyHTTPS
Hail History
Weather
Radar-detected hail history for any US address from NOAA NEXRAD Level-III hail detections, by year
No keyHTTPS
Hong Kong Obervatory
Weather
Provide weather information, earthquake information, and climate data
No keyHTTPS
IPMA
Weather
Portuguese weather and climate data
No keyHTTPS
Meltema
Weather
Multi-model weather: GFS, ECMWF AIFS/IFS and a 31-member GEFS ensemble, keyless point forecasts
No keyHTTPS
ODWeather
Weather
Weather and weather webcams
No key
RainViewer
Weather
Radar data collected from different websites across the Internet
No keyHTTPS
Weather Hacks
Weather
Weather, for Japan
No key
weather-api
Weather
A RESTful API to check the current weather by providing city names as parameters. It offers functionalities to get temperature, wind speed, and a weather description in a simple JSON format.
No keyHTTPS
WeatherTotals
Weather
The WeatherTotals JSON API provides real-time weather data including precipitation and snow information across various US states. The API does not require a key or signup, making it accessible for quick integration into applications.
No keyHTTPS
World Time & Weather
Weather
Local time, UTC offset, DST rules, current weather and climate normals for 400 cities
No keyHTTPS
Air Quality API
Weather
Pollutants and pollen forecast in 11 km resolution
AuthCORSHTTPS
Automatic Weather Stations
Weather
The Automatic Weather Stations API provides access to data from around 160 automatic measurement stations within the SwissMetNet network. It delivers vital meteorological data including temperature, precipitation, wind speed, and humidity every 10 minutes to support weather forecasting and environmental monitoring.
AuthCORSHTTPS
ColorfulClouds
Weather
Weather
API keyCORSHTTPS
Global Flood API
Weather
Simulated river discharge at 5 km resolution from 1984 up to 7 months forecast.
AuthCORSHTTPS
HG Weather
Weather
Provides weather forecast data for cities in Brazil
API keyCORSHTTPS
All 64 Weather APIs
- DWD API
- Meteorologisk Institutt
- Open-Meteo Ensemble
- openSenseMap
- Pirate Weather
- US Weather
- wttr.in
- 7Timer!
- AviationWeather
- Hail History
- Hong Kong Obervatory
- IPMA
- Meltema
- ODWeather
- RainViewer
- Weather Hacks
- weather-api
- WeatherTotals
- World Time & Weather
- Air Quality API
- Automatic Weather Stations
- ColorfulClouds
- Global Flood API
- HG Weather
- Manual Precipitation Stations
- Meteoblue
- Micro Weather
- NOAA Climate Data
- Oikolab
- Open Meteo
- QWeather
- Weather Data API
- Weather Data API
- WeatherAPI
- Yandex.Weather
- Aare.guru API
- AccuWeather
- Aemet
- APIXU
- AQICN
- AviationWeather Data API
- BBC Web API
- Console Weather Forecast
- Euskalmet
- Foreca
- Free UV Index API
- Glax Weather API
- Indoor Environmental Monitoring
- KNMI
- Météo-France
- Meteoprog Weather API
- NDBC Buoy Data API
- OpenUV
- OpenWeatherMap
- Rainbow Weather
- Realtime Weather API
- Storm Glass
- Stormglass
- Tomorrow
- UV Index API
- Visual Crossing
- Weather Data API
- Weather Forecast API
- Weatherbit
Free Weather APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free weather APIs are there?
We track 64 in this category, of which 55 responded at our last check. 19 of them need no API key.
Which weather APIs work without an API key?
19 of the 64 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these weather APIs in a browser app?
7 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free weather API?
Of the keyless options that responded at our last check, Open-Meteo Ensemble was quickest at a median 282 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 487 of 2,712 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.