Map Legend
Table
Chart
Calculate
Download
Resources
| Color | GDD °F | Estimated Wheat Growth Stage |
|---|---|---|
| 0 to 600 | Seedling growth or tillering | |
| 600 to 800 | Tillering or strongly upright tillers | |
| 800 to 1000 | Strongly upright tillers or jointing (first node) | |
| 1000 to 1200 | Jointing (first node) or approaching flag leaf emergence | |
| 1200 to 1400 | Flag leaf emergence or boot | |
| 1400 to 1600 | Boot or heading | |
| 1600 to 1800 | Heading to flowering | |
| 1800 to 2000 | Heading or flowering | |
| 2000 to 2200 | Flowering or watery ripe | |
| 2200 to 2400 | Watery ripe or milk | |
| 2400 to 2600 | Milk or dough | |
| 2600 to 2800 | Dough or kernels maturing | |
| 2800 to 3000 | Dough or kernels maturing | |
| More than 3000 | Physiologically mature or approaching harvest |
Data as of March 20 2026 15:00 (CDT) -- Click column headers to sort data
Zoom:
Calculate Growing Degrees for a custom date range.
Using .
To change station, select from "Change Station" dropdown above.
Available dates start at station's period of record (2010 for our oldest stations) and continue until yesterday.
Start Date:
End Date:
Observed GDD:
Norm GDD:
| Growing Degrees = | Daily Max Air Temp + Daily Min Air Temp | - 32 |
| 2 | ||
| Negative values are set to 0 | ||
Citation and Usage Policy
Data
Chart (current station)
.csv (8K)
Maps