tech
Rainbow Weather raises $5.5M to refine real-time weather forecasting
Warsaw, Poland 26 January 2026 – Rainbow Weather has raised $5.5 million in seed funding to push weather forecasting further into the short-term, high-precision territory it believes the industry still underserves.
TL;DR
- Rainbow Weather secured $5.5 million in seed funding to focus on hyperlocal, minute-by-minute weather forecasts.
- Their core product is a mobile app delivering four-hour precipitation forecasts calculated from the exact moment a user checks the weather.
- The company uses machine learning to fuse data from radar, satellites, weather stations, and smartphone barometers for improved accuracy.
- New funding will extend forecasting to 24 hours, add more weather parameters, and expand B2B services.
- Rainbow Weather also operates weatherindex.ai, an open-source project evaluating short-term precipitation forecasts from major providers.