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Guides
Plain-English guides to the weather calls that make or break farm jobs. Australian conditions, metric, and sourced — so you can check the working.
Delta T explained
The evaporation number that decides whether a spray droplet lands or vanishes — with a live calculator to read your own conditions.
When to spray
Wind band, Delta T and inversion risk stacked into one go or no-go window — and why dead calm is worse than a breeze.
Hay curing weather
How many clear days you need between mower and baler, and why 18% moisture is the line between good hay and a haystack fire.
Spreading urea before rain
Why urea wants 5–10 mm within about 48 hours, and how much nitrogen you lose to the air when the rain misses.
These guides are the sums the app runs
Nothing here is content filler. Every threshold in these guides — the Delta T bands, the wind limits, the moisture lines — comes from published GRDC and Bureau of Meteorology guidance, cited at the end of each one. CropWindow simply runs the same agronomy against your local forecast, every hour, for every job on your list.
Read the guides once. Let the app do the sums daily.
Free in early access, Android now. Every threshold in these guides is a default you can edit.
Get CropWindow for Android →