How much rain fell on each of your fields
The rain total for town is not the rain total for your field. Raindex measures rainfall for each field you save, from NOAA’s radar and rain-gauge network on a 1 km grid, and keeps a record of every day.
Each field, its own number
Save fields by dropping a pin. Rainfall is read for the ~1 km NOAA MRMS cell each one sits in, so the back forty and the home place are measured separately.
A history that fills in
Saving a field fills in the last 7 days (30 on a paid plan) and keeps every day after that, with hour-by-hour detail for any day. A missing hour shows as missing, never as a dry one.
An alert at your amount
Choose an amount and a window, say 0.5 in over 24 hours, and get a push when a field crosses it. Pro allows up to 10 alert levels on a field.
CSV for your records
Pro exports a field's daily totals and every hourly reading, each labelled gauge-adjusted, radar only or no reading, ready for Excel, Numbers or Sheets.
What an inch means on a field
One inch of rain on one acre is about 27,154 gallons of water (USGS), so an inch on a 160-acre quarter section is about 4.3 million gallons. How much of it the soil keeps depends on how fast it fell, which is why the hour-by-hour view matters as much as the total. More on converting rain to volume.
What it will not do
- It is an estimate for a ~1 km cell, not a gauge on your field. It carries no accuracy percentage, because the data cannot honestly support one.
- It does not make spraying, planting or irrigation decisions, and it is not a certified record for insurance or contracts.
- It is not a warning service. Flood and severe-weather warnings come from the National Weather Service; Raindex shows NWS flood notices for your places but measures, it does not warn.
- It covers the lower 48 United States only.
Rain totals in farm country
Last 24 hours and 30-year averages for ag hubs. For your own ground, use the ZIP lookup or save the field in the app.
Common questions
How many fields can I track?
One place on the free plan, 15 on Standard ($4.99/month or $19.99/year) and 30 on Pro ($9.99/month or $39.99/year). 7-day free trial on yearly plans for eligible new subscribers.
Two of my fields are a mile apart. Will they show different totals?
Often, yes. Each field is read from the ~1 km cell it sits in, so fields in different cells get their own totals. Fields inside the same cell show the same number, because that is the resolution of the data.
Can I use Raindex totals for crop insurance or a contract dispute?
Raindex is an estimate from public NOAA data, labelled with how each number was made. It is not a certified measurement, and whether any record is accepted is up to your insurer or the other party. The CSV export gives you a clean, dated record to bring to that conversation.
Does it tell me when to spray or irrigate?
No. It tells you how much rain fell, and alerts you when a field passes an amount you choose. What that means for spraying, planting or irrigation is your call, or your agronomist's.
What about snow?
Snow and hail are shown as liquid equivalent and labelled as frozen, because radar is weaker there. Raindex does not report snow depth.
Start with one field, free
The free plan tracks one place with 24-hour totals, a week of history filled in on saving and a threshold alert. Add fields when it earns its keep.
Worth reading
- How Much Water Is an Inch of Rain?An inch of rain on an acre is about 27,154 gallons. The same inch on a roof, a lawn or a square mile, with the arithmetic shown.
- Gauge-Adjusted, Radar Only, Provisional: What Rainfall Labels MeanEvery Raindex reading carries a label saying how the number was made. What gauge-adjusted, radar only, provisional and no reading mean, and why there is no accuracy percentage.
Where these numbers come from
- What Raindex measures
- Raindex measures observed rainfall from NOAA’s Multi-Radar Multi-Sensor system (MRMS) at roughly 1 km resolution, combining radar estimates with rain-gauge adjustment. The gauge-corrected pass runs about 97 minutes behind real time, so a recent total can be revised upward or downward as gauge data arrives.