01missed by 4 hrs
The spray you missed by 4 hours.
The window opened before dawn and closed before you checked the radar. The fungicide went on too late to matter.
Before RainWatch
The losses that happen between forecasts.
02found out at 06:00
The frost you found out about at 6am.
By the time you walked the rows, the damage was done. A warning the night before would have saved the buds.
0314h leaf wetness
The disease pressure you only saw in the leaves.
Leaf wetness and warmth had been building for days. You learned it from the symptoms, not the forecast.
How RainWatch works
Three alerts, each timed to the hour it matters.
We send the decision, not the data — the spray window, the disease-risk hour, the growing-degree-day milestone.
Spray windows
Know the exact hours conditions line up for an effective application — wind, humidity, and a dry runway — before the window opens, not after it closes.
RainWatchnow
RainWatch · Spray window opens at 6:00 AM Tuesday for your north block. Wind 4mph, RH 68%, no rain 8hr. Closes ~10:30 AM.
Tuesday window6:00a – 10:30a
4a
5a
6a
7a
8a
9a
10a
11a
Wind4 mph
Humidity68% RH
Disease risk
Get ahead of the pressure. We watch leaf wetness, temperature, and humidity against crop-specific disease models and flag the high-risk hours early.
RainWatchnow
RainWatch · Downy mildew risk HIGH for next 48hr. Leaf wetness 14hr forecast, temp 62-74°F. Consider preventive spray.
Downy mildew modelHigh
Leaf wetness14 hr
Canopy temp62–74°F
Humidity91% RH
Risk stays elevated for the next 48 hours — preventive spray advised before Thursday rain.
GDD milestones
Track accumulated growing degree days against the milestones that matter for your crop, with a forecast-based estimate of what's coming next.
RainWatchnow
RainWatch · Your vineyard hit 1500 GDD today (April 1 base). Veraison underway — estimated harvest window in ~3 weeks on the 7-day forecast.
Season to date1,500 GDD
Budbreak60 GDD
Bloom320 GDD
Veraison1,400 GDD
Harvest2,000 GDD
Precision weather.
Real-world results.
Built for
what's next.
Advanced weather monitoring systems designed to deliver accurate data when it matters most.
Learn moreGrowing degree days
We turn accumulated heat into your crop's calendar.
Growing degree days add up the warmth your crop actually felt, day by day. RainWatch maps that running total to the stages that matter — so you know what's next before you see it in the vines, and we text you as each milestone lands.
Grapes · 50°F base · accumulating since April 1- 60 GDD
Budbreak
First green tissue breaks on the cane.
- 320 GDD
Bloom
Flowering — fruit set hinges on this weather window.
- 520 GDD
Fruit set
Berries form; canopy and spray decisions ramp up.
- 1400 GDD
Veraison
Color change, sugars climb, disease watch peaks.
Today · 1500 GDD
Veraison underway — harvest window roughly three weeks out on the current forecast.
- 2000 GDD
Harvest
Target maturity for the block.
Who it's for
Built for the people reading the sky for a living.
Vineyards
Protect canopy and fruit with disease-pressure alerts tuned to grape, and time every spray to the window that actually closes the gap.
frost watch
Orchards
Catch frost events before bloom and track GDD to bud break and harvest, so apple and stone-fruit decisions land on the right day.
Row crops
Corn and soybean growers get planting, spray, and disease-risk windows mapped to the field — not the nearest airport weather station.
Ag consultants
Monitor every client operation from one feed of alerts, and show up with the recommendation before the grower has to ask.
Questions
The honest answers, up front.
Still wondering something? Just ask when you request a pilot.
Stop reacting to the weather. Start working with it.
Tell us about your operation and we'll scope a pilot tuned to your crop and your fields.