Rainbow
Rainbow · AI Assistant
Rainbow is an AI weather forecast app built around short-term precipitation nowcasting. Its engine pushes min-by-min rain and snow predictions up to four hours ahead, blending live satellite and radar feeds into hyperlocal forecasts. The app adds live rain radar, a seven-day outlook, precipitation alerts, home-screen widgets, and a hurricane tracker, and it runs on both Android and iOS with a free tier plus paid upgrades.
About Rainbow
What Is Rainbow
Rainbow is a weather app that leans on machine learning to tell you exactly when rain starts and stops near you. Instead of a daily percentage, it gives precipitation timing at one-minute resolution across a 1 km grid, refreshed roughly every ten minutes. That focus on the next few hours sets it apart from standard weather apps that mostly restate government forecasts.
The company behind it was founded by entrepreneurs who paired with a machine learning team to build a dedicated nowcasting engine. It pulls real-time data from satellites and radars rather than forecasting from scratch. According to WeatherIndex.ai, a third-party ranking the developer cites, Rainbow currently ranks as the most accurate short-term precipitation forecaster worldwide.
The limits are worth knowing before you commit. It's a hyperlocal weather app, not a climate tool. The app's strength is precipitation in the near term, not long-range climate trends or severe-weather science. It's a mobile-first product. There's no desktop dashboard, and hyperlocal accuracy still depends on how dense the radar coverage is in your region.
Getting Started
- Download Rainbow from the App Store or Google Play, or scan the QR code on the official site.
- Grant location access so the app can pull hyperlocal radar and nowcasting data for your area.
- Allow notifications if you want rain and snow alerts before precipitation reaches you.
- Add a home-screen widget to see the next few hours of rain at a glance.
- Open the live precipitation map to track storms, or set up the radar view for upcoming trips.
Product Information
A quick look at Rainbow's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Commuters
- Parents and pet owners
- Runners and cyclists
Tasks
- Timing a trip outside
- Watching storms roll in
- Tracking hurricanes and heavy weather
Scenarios
- Getting caught without an umbrella
- Planning an outdoor event or commute
- Keeping an eye on weather while traveling
Key features
Minute-by-Minute Rain Forecast
The core of Rainbow is a nowcasting engine that predicts precipitation minute by minute up to four hours ahead. You don't get a vague "60% chance of rain" for the day. You get a timeline showing when drops start, pause, and stop near you. That resolution matters. It makes the forecast useful for a single walk or errand rather than a whole afternoon.
Live Rain Radar
Rain beats guesswork. A precipitation map updates about every ten minutes, so you can watch storms move across the map and judge where they'll land rather than guessing at it from a static icon. The radar view shows rain and snow sweeping across an interactive map, which helps you judge whether a burst is heading toward you or sliding past. It's the feature most people open when the sky turns dark. It just works.
Hyperlocal Resolution
Rainbow forecasts at a 1 km grid, which is far finer than the city-level forecasts most apps deliver. If you live somewhere where rain falls hard on one side of town and skips the other, that detail matters. Small storms are local. The trade-off is that accuracy leans on the underlying radar network, so remote areas see less benefit than dense metro regions.
Precipitation Alerts and Notifications
The app sends rain and snow alerts for your saved location, covering everything from a light drizzle to a full downpour, and it warns you ahead of time so you can adjust plans instead of reacting once it's already wet. Notifications are opt-in, which means you decide how much noise you actually want from the app each day.
Weather Widgets and Dark Mode
Home-screen widgets surface the next hours of precipitation without opening the app, which is handy for a quick morning check. Dark mode keeps the map and forecast readable at night or in low light. Both are small touches. Still, they matter.
Seven-Day Outlook
Beyond the short window, Rainbow shows a multi-day forecast so you can plan further out. It covers the basics you'd expect from a multi-day outlook, and it pairs with the nowcast when you're deciding between today and tomorrow for an outdoor plan. The long-range side is standard. The short-range side is where the app earns its keep.
Hurricane Tracker
A dedicated hurricane tracker follows major tropical systems and their projected paths. For anyone in a storm-prone region, that's a separate reason to keep the app installed beyond routine rain. Storms matter too. It rounds out a weather tool built for people who care about precipitation and storms. Nothing more. That's the point.
Pros and cons
Pros
- Minute-level rain timing gives you a usable window rather than a daily probability.
- Hyperlocal 1 km resolution catches showers that city-level apps miss.
- Alerts fire before precipitation arrives, so you can act in time.
- Live radar updates every ten minutes and is easy to read on a phone.
Cons
- Strength is short-term precipitation, so it's not the place for long-range climate planning.
- Accuracy depends on local radar density, meaning rural users get less value than city users.
- Mobile-only with no desktop dashboard, which limits use during desk work.
- No public API, so you can't pull its forecast data into your own tools or app.
Frequently asked questions
Rainbow gives minute-by-minute rain and snow forecasts for your exact location, along with live radar, short-term alerts, and a precipitation map that updates roughly every ten minutes for your area. It's built for people who want to know precisely when precipitation starts and stops near them rather than just whether rain is likely sometime during the day.
Related content
Explore related tools, skills, and articles for Rainbow.
Rainbow Alternatives
Hark
Hark · Productivity · AI Assistant · China AIHark is a personal AI assistant that books, buys, and organizes things for you. It runs on web, iOS, and Android, remembers your preferences, and hands bigger jobs to a computer-use agent.
Rhem Labs
Rhem Labs · AI Assistant · China AIRhem is a tabletop health assistant robot from Rhem Labs that takes blood pressure and other wellness readings, runs reminders, makes calls, and sends fall alerts to family.
Wabi
Wabi, Inc. · Productivity · AI Assistant · ChatbotWabi is a messenger-style AI assistant for iOS, Android and Mac. It sorts your life into shared threads, builds small apps inside each one, and handles email, calendar and errands after you approve.