Transparency
Data Sources
Aura Weather combines data from the world's most trusted meteorological sources to give you accurate, hyperlocal forecasts. Here's exactly where your weather comes from.
How we combine these sources
Rather than relying on a single forecast model, Aura Weather queries multiple data providers and blends them intelligently. ECMWF ensemble data provides confidence intervals — when all 51 models agree, we display higher confidence. When they diverge (e.g., before a complex storm), we surface that uncertainty visually. Radar data from RainViewer grounds our short-term nowcasts in real observations, while Open-Meteo's aggregation layer ensures we always serve the most appropriate regional model for your location.
Open-Meteo is an open-source weather API that aggregates data from the world's leading national weather services. It serves as the backbone of Aura Weather's forecast engine, providing hourly and daily conditions, ensemble forecast data, and air quality measurements.
Data provided
- Current conditions (temperature, humidity, wind, pressure, UV index)
- Hourly & daily forecasts up to 16 days ahead
- Air quality index — PM2.5, PM10, ozone, NO₂, SO₂, CO
- Marine & ocean data — wave height, swell period, sea surface temperature
- Ensemble forecast data from multiple models for confidence scoring
- Precipitation type and probability
Models & datasets
License: Open-Meteo data is available under the Creative Commons Attribution 4.0 International license (CC BY 4.0). Weather model data originates from national meteorological services (see ECMWF and MET Norway sections below). Privacy Policy ↗
The European Centre for Medium-Range Weather Forecasts (ECMWF) operates the world's most accurate global weather model. Aura Weather uses ECMWF's Integrated Forecast System (IFS) — including its 51-member ensemble (ENS) — to power confidence scoring and uncertainty visualization in long-range forecasts.
Data provided
- 51-member ensemble forecast system (ENS)
- Deterministic high-resolution forecast (HRES) at ~9 km resolution
- Extended-range forecasts up to 46 days
- Forecast confidence bands (spread between ensemble members)
- Global atmospheric re-analysis data (ERA5)
Models & datasets
License: ECMWF data used in Aura Weather is accessed via Open-Meteo's API under the CC BY 4.0 license and ECMWF's open data programme. Privacy Policy ↗
RainViewer aggregates radar data from national weather radar networks across North America, Europe, and beyond, compositing them into a unified global precipitation layer. Aura Weather uses RainViewer's tile API to power its animated radar screen, showing where rain is now and where it's heading.
Data provided
- Real-time radar precipitation imagery (updated every 10 minutes)
- Historical radar frames (past 2 hours)
- Nowcast frames (next 30–60 minutes)
- Global radar coverage composited from national networks
- Satellite-derived cloud cover for radar-sparse regions
Models & datasets
License: Radar imagery is displayed under RainViewer's API terms. No raw radar data is stored by Aura Weather. Privacy Policy ↗
The Norwegian Meteorological Institute (MET Norway) operates the MEPS (MetCoOp Ensemble Prediction System) and Norkyst800 models — providing exceptionally high-resolution forecasts for the Nordic region and surrounding waters. These models are particularly valuable for users in Scandinavia, the North Sea, and Arctic areas.
Data provided
- MEPS: 2.5 km resolution forecasts for Scandinavia and North Sea
- Norkyst800: 800-meter resolution coastal ocean currents and sea state
- High-fidelity orographic precipitation (mountain terrain)
- Sea ice analysis for Arctic regions
- Wind and wave conditions for Norwegian coast
Models & datasets
License: MET Norway data is published under the Norwegian Licence for Open Government Data (NLOD) and Creative Commons Attribution 4.0. Privacy Policy ↗
Attribution
Aura Weather gratefully acknowledges the contributions of the global meteorological community. The open availability of high-quality weather model data — from ECMWF, MET Norway, NOAA, and others — makes accurate, free weather forecasting possible worldwide. We are committed to maintaining proper attribution and compliance with all data licenses.
If you represent a data provider and have questions or concerns about our usage, please contact hello@auraweather.app.
Last updated: February 25, 2026