Every litre of pesticide wasted on bad-weather spray days is money that doesn't reach your crop. Wind, humidity and temperature determine whether a spray application works — or drifts. We read those conditions so you don't have to guess.
Wind above 15 km/h disperses droplets off-target. Temperature inversion traps volatile compounds near the ground. Low humidity evaporates small droplets before they reach the leaf surface. Each of these is readable from a weather station — but invisible to the naked eye until it's too late.
Our system cross-references wind speed, humidity, temperature and inversion risk to score each hour of the day. Green means spray. Yellow means proceed with care. Grey means wait.
The primary drift risk factor. Even a brief gust while spraying can carry droplets hundreds of metres off-target — onto neighbouring crops, water bodies, or buffer zones.
High temperatures cause droplet evaporation and temperature inversion — a condition where hot air traps spray at ground level, causing phytotoxicity. Spray early morning or evening to avoid.
Low humidity evaporates fine droplets before they reach the leaf surface, dramatically cutting systemic pesticide uptake. High humidity can help — but also raises disease risk and prolongs wet surfaces.
Rain within 4–6 hours of application washes systemic pesticide off the leaf surface before it can be absorbed. Our platform flags imminent rain risk from barometric pressure and rainfall data — so you don't spray before a storm.
Systemic fungicides require 4–6 dry hours after application for full uptake. Combined with our disease model alerts (see Crop Protection), you get a double signal: apply now, and conditions will hold for absorption.
Linked to disease alertsPre-emergent and early post-emergent herbicide application is highly sensitive to rain. One unexpected shower within hours of application can move herbicide off the soil surface, requiring costly reapplication.
Rain interval alertsContact insecticides on vegetables require precise timing: too hot and the product evaporates; too windy and it never reaches the undersides of leaves where pests shelter. Hourly forecasting finds the right window.
Contact-spray precisionA weather station at your farm edge gives you wind, temperature and humidity data continuously. We score each hour of the day and send an alert when your spray window opens. No app required — just a message on any phone.