The Weather API Built forDevelopers Who Demand Accuracy
WeatherAI.io delivers real-time conditions, AI-powered forecasts, historical records, solar irradiance data, and natural-language weather queries — all through a single, developer-friendly REST API.
Start with 1,000 free Standard API calls and 50 free Premium calls every day. No credit card required.
No credit card · Instant access · Cancel any time
Everything Your Application Needs
From live weather widgets to climate-analysis pipelines, our API covers every use case — with clean, consistent JSON responses that take minutes to integrate.
Real-Time Weather Data
Fetch current temperature, humidity, wind speed, UV index, pressure, and air quality for any city, coordinates, zip code, or IP address worldwide. Data refreshed every few minutes.
Learn moreAI-Enhanced 14-Day Forecasts
Our machine-learning models are trained on years of meteorological data to deliver hourly and daily forecasts with up to 40% better accuracy than baseline models — including chance of rain and snow.
Learn moreHistorical Weather Archive
Query weather records dating back to January 2010. Retrieve day-by-day temperature, precipitation, and wind data for any location — ideal for research, insurance underwriting, and trend analysis.
Learn moreSolar Irradiance & Radiation
Precision solar data including Global Horizontal Irradiance (GHI), Direct Normal Irradiance (DNI), and diffuse radiation by hour. Indispensable for solar panel sizing and energy-yield modelling.
Learn moreAI Natural-Language Queries
Ask weather questions in plain English — "Will it rain in Paris next Tuesday?" — and receive a conversational answer backed by live data. Perfect for chatbots, voice assistants, and smart dashboards.
Learn moreExtended Future Forecasts
Look up to 300 days ahead for long-range planning. Essential for agriculture, construction scheduling, event planning, and logistics operations that depend on seasonal predictions.
Learn moreAir Quality Index
Real-time PM2.5, PM10, CO, NO2, and US EPA Index for any location. Add environmental health context to fitness apps, smart-home devices, and urban planning tools.
Learn moreSevere Weather Alerts
Receive active warnings and watches issued by government meteorological agencies. Integrate life-safety alerts into travel apps, facility management systems, or emergency response platforms.
Learn moreLocation Autocomplete
A fast search endpoint returns ranked city matches from a partial name, enabling polished location-picker UIs with just one API call — no additional geocoding service required.
Learn moreUp and Running in Under 5 Minutes
No complex setup. No vendor lock-in. Just clean REST endpoints you can call from any language or framework.
Create a Free Account
Sign up in seconds. No credit card required. Your first API key is generated automatically and ready to use immediately.
Make Your First Request
Call any endpoint with your X-API-Key header. A single GET request to /v1/current?q=London returns full weather data in clean JSON.
Monitor & Scale
Track every call in your dashboard. Add credits when you need them — starting from $0.001 per call, with no monthly commitment.
# Get current weather for London
curl "https://api.weatherai.io/v1/current?q=London&units=metric" \
-H "X-API-Key: your-api-key"
# Ask a natural-language question
curl -X POST "https://api.weatherai.io/v1/ai" \
-H "X-API-Key: your-api-key" \
-d '{"q":"Will it rain in Tokyo this weekend?"}'Built for Every Industry
Wherever decisions depend on the weather, WeatherAI.io gives you the data — and the intelligence — to act confidently.
Travel & Navigation Apps
Display live conditions and multi-day forecasts in flight trackers, route planners, and travel booking platforms. Warn users of severe weather before they depart.
Renewable Energy & Solar
Maximise solar panel output predictions with hourly GHI and DNI data. Integrate irradiance forecasts directly into energy management systems and smart inverters.
Agriculture & Precision Farming
Schedule irrigation, planting, and harvesting with AI-enhanced forecasts and long-range outlooks. Access historical data to model yield risk and climate trends.
Insurance & Risk Analytics
Query historical records for any date and location to support claims investigation, risk underwriting, and actuarial modelling. Reliable data back to 2010.
AI Assistants & Chatbots
Let your users ask weather questions in plain English. Our AI endpoint interprets intent, fetches live data, and responds conversationally — in one API call.
Retail & Supply Chain
Correlate weather patterns with demand signals to optimise inventory, staffing, and logistics. Predict how an incoming cold snap will affect sales regionally.
Why Developers Choose WeatherAI.io
We built the API we wished existed — accurate, affordable, and easy to integrate from day one.
AI accuracy you can measure
Our forecasts use ensemble machine-learning models validated against independent station data. In back-testing across 50,000 locations, they outperform baseline NWP models by up to 40% on 72-hour temperature and precipitation predictions.
Predictable, pay-as-you-go pricing
You get 1,000 free Standard calls and 50 free Premium calls every day. Beyond that, you pay $0.001 per call — no subscriptions, no surprises. Buy credits when you need them and they never expire.
One key, all endpoints
A single X-API-Key header authenticates every endpoint, from current conditions to AI natural-language queries. Consistent JSON schemas mean you spend time building features, not reading changelogs.
Global coverage, local precision
Query by city name, latitude/longitude, postal code, IATA airport code, or IP address. Data is sourced from a global network of weather stations and satellites, with hyperlocal corrections applied by our AI layer.
Dashboard built for developers
Manage multiple API keys, inspect per-endpoint usage, run live test requests in-browser, and download call logs as CSV — all without leaving the dashboard. No third-party tools required.
Start Free. Scale Affordably.
No monthly commitment. No usage tiers. Just a generous free allowance every day and the lowest per-call rate in the market.
Then $0.001 per call
- Current weather
- 14-day forecast
- Timezone & astronomy
- Location search
- Weather alerts
- Air quality
Then $0.001 per call
- Historical data (2010–present)
- Future forecasts (up to 300 days)
- Solar irradiance (GHI, DNI)
- AI natural-language queries
- Unlimited API keys
- Usage analytics dashboard
No credit card required · Free allowance resets daily
Ready to Build Something Great?
Join developers worldwide who use WeatherAI.io to power their apps, models, and pipelines. Your first 1,000 calls are waiting — right now, completely free.