One data layer, four honest forecasts
Every forecast source gets scored against real station data, blended by track record, and shipped into four working apps. Ask any of them a question in plain language and get a straight answer back — and let Datum drive your connected home off the real conditions outside your door.
Same blending and accuracy-tracking pipeline underneath every one of them — tuned to what each place actually needs.
Home & yard forecasting, tuned to your own station's track record.
Marine forecasting for anchor and underway, built on tide + wind ground truth.
Mountain & backcountry conditions, scored against SNOTEL and ridge stations.
Field-level forecasting for growers, with frost-window and GDD tracking.
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Built on one honest data layer
Every Datum app answers real questions with real answers — no dashboards to decode. Ask the way you'd ask a neighbor who happens to have every model scored against your own station.
Same question, any app — the answer is always tied to what actually verified at your location.
It doesn't just tell you — it acts
Datum doesn't stop at the forecast. Because every reading is scored against real ground truth in your own yard, it can drive your connected home off what's actually happening outside — not a regional forecast, not a blind timer. Set a rule once and it runs itself.
Nudge your setpoint the moment your yard's own temperature or humidity crosses a line you set — pre-cool before the real heat lands, ease back once it passes. Connects through Honeywell Home.
Skip or shorten a watering run when your yard actually caught the rain — home sprinklers or farm controllers.
Retract or close ahead of a real wind gust or confirmed incoming rain, then reopen once it clears.
Cut power to outdoor outlets above a wind or rain threshold, and drive exterior lighting off real sunrise and sunset — not a fixed clock.
Automate fill and drain cycles around real rainfall and evaporation instead of a timer.
Hold a scheduled mow whenever the ground is actually wet — not just when the forecast said it might be.
Thermostat control is connecting now through Honeywell Home; the rest of the automation layer switches on as each integration comes online — every action driven by your yard's validated readings. Request access to get in early.
Datum tracks every model against real stations, every single day — so "blended forecast" means something measured, not assumed.
A live network of real stations — NWS, buoys, SNOTEL, CoCoRaHS and more — used as the actual answer key.
Every model's forecast gets checked against what actually happened, nationwide, on temp, precip and more.
Each app's forecast is a weighted blend, bias-corrected by each source's own track record at that location.
Every app's blended forecast is scored against every model that forecast for it, against real station readings. Right now the most accurate model is a different one at several of the 4 sites we run — Meteoblue and openmeteo_gem each lead somewhere. Datum weights toward whichever one is actually earning it, location by location.
Sign in to open Dooryard, Beaufort, Treeline or Furrow, ask them anything, or dig into the live Benchmark data yourself. Don't have access yet? Request an invite below.