Better than the weather app that came with your phone.
Next-hour forecasts checked against 110 research-grade U.S. Climate Reference Network rain gauges.
How Precip works
Measure what fell. Predict what's next.
Most weather apps pass along a coarse forecast and never check if it was right. Precip measures what actually hits the ground at 1 km resolution, then uses that ground truth to build a more accurate forecast.
Observe Radar See the storm in motion
Predict the Storm Forecast path and intensity
Measure What Fell Record calibrated observations
Better observations
Start with what actually hit the ground
Instead of treating yesterday's forecast as history, Precip combines high-resolution Doppler radar with quality-controlled rain gauges to measure what really fell, then continually refines the record as more stations report.
Minute-by-minute predictions
Better inputs make a better nowcast
Precip's in-house nowcast starts from a live 1 km picture of the storm, then projects where rain will move in 5-minute steps over the next hour so you don't get caught in a downpour.
1 kmspatial resolution
5 minforecast steps
60 minforecast horizon
Nowcast benchmarks
Gauges on the ground prove it's the best
We tested the top nowcasts (short-term minute-by-minute forecasts) against independent rain gauges and NOAA radar across the US. Precip comes out on top.
92% more accurate than Google Weather for medium to heavy rain
121% more accurate than Apple Weather for medium to heavy rain
37/38 head-to-head tests won against Google, Apple, Tomorrow.io and
Rainbow.ai
Ahead of the weather industry at every minute of the hour.
Whether it will rain in each 5 minutes of the next hour, checked against NOAA radar at the gauge sites.
Apple cries wolf. Google lets you get drenched.
What happens when you rely on the weather app that came with your phone.
Third-party names are trademarks of their respective owners.
How the measured record is built
Why Precip has the best historical precipitation data
Radar and rain gauges
We combine live scans from 180+ Doppler radar stations with thousands of quality-controlled rain gauges on the ground.
Corrected for terrain and wind
Radar beams overshoot low clouds, get blocked by mountains, and drift in the wind. Our models correct for terrain, beam height, and temperature to measure what actually reached the ground.
Refined as gauges report
Radar gives you an answer in minutes. Over the hours and days that follow, we fold in reporting rain gauges to continually sharpen the record.
Coverage and resolution
We dial up the resolution
Most weather models run on coarse 5 to 10 km grids. Precip measures rain and runs its nowcast at 1 km resolution with 5-minute updates, and sharpens its 10-day forecast to a 2.5 km terrain grid across the U.S.
In the U.S., each 1 km grid cell covers roughly half a square mile (about 160 acres). In Canada, each 2.5 km cell covers about 1 square mile (250 hectares).
See full data availability & specifications 1 km United States
Live rate, nowcast, and measured precipitation
2.5 km United States & Canada
U.S. 10-day forecast and Canada measured precipitation
Historical precipitation benchmark
Why observations beat forecasts
Many weather apps show yesterday's forecast and call it history, without ever checking if it actually rained. Precip measures what fell using Doppler radar and ground gauges.
60% more accurate than a NOAA HRRR forecast
275% better rainfall detection (Critical Success Index)
No rainfall estimate is perfect, and even physical rain gauges can undercatch in high wind by 2% to 10%. Read why measuring rain with gauges is hard.
The charts below come from our benchmarking study comparing Precip against the NOAA High-Resolution Rapid Refresh (HRRR) forecast at Integrated Surface Database (ISD) rain gauges across the U.S.
Data provenance
Third-party data sources
Precip combines our own models and post-processing with observations and forecast guidance from the world's leading weather centers.
See how Precip's 10-day forecast scores against ECMWF and Google- NOAA Doppler radar, surface gauges, HRRR, and URMA analysis
- ECMWF Global ensemble and high-resolution forecast guidance
- Google DeepMind WeatherNext 3 global AI ensemble forecast
- Open-Meteo Global multi-model forecast distribution
- Rainbow AI Global nowcast coverage outside Precip's radar domain
See every storm
Put precision precipitation in your pocket.
Get Precip free on iPhone, Android, and the web.