WeatherByTrade
How we calculate the call
Every go / caution / no-go call is produced by a deterministic engine — the same rules, every day, no AI guessing the answer. Here is exactly how it works and where every number comes from.
The three calls
Go — conditions are within every published limit for the work; nothing is blocking the day.
Caution — workable, but a real precaution or a shortened window applies (we say which, and until when).
No-go — at least one published stop-condition is met (rain on a fresh coat, below the cure minimum, unsafe wind).
Deterministic, not a guess
The forecast goes into a fixed set of rules per trade; the rules decide the verdict. A language model never decides whether you can work — at most it helps phrase a sentence around a verdict the rules already produced. When a required number is missing from the forecast, the engine says so rather than inventing one.
Where the thresholds come from
Every threshold traces to a primary source, not opinion:
- Work-safety limits — OSHA construction standards (e.g. wind limits for handling materials, heat-index guidance).
- Material limits — manufacturer Technical Data Sheets: Sherwin-Williams, Behr, PPG, Benjamin Moore (coatings); SealMaster, GemSeal (sealcoat); and others, by trade.
- Placement & cure standards— ACI (concrete), state DOT laydown tables (asphalt), and industry standards where a manufacturer number doesn't exist.
Where no citable number exists, we say so and use a conservative, clearly-labeled editorial line rather than implying false precision. Each factor on a trade page shows its source inline.
The weather data
Forecasts come from the U.S. National Weather Service (api.weather.gov), with Open-Meteo as a supplemental and fallback source for fields like soil moisture. Calls are refreshed daily; each page shows when it was last updated.
What this is not
WeatherByTrade is decision support, not professional, engineering, or safety advice. Always verify against the manufacturer's current data sheet and your own site conditions and safety judgment. See our Terms.