Climate Dashboard for NC Corn Growers
This tool provides corn growers in North Carolina with climate-based information and predictions about seasonal corn development. To use this tool, select your location and planting date (past or anticipated) and click “Update Chart”. Scroll down to see forecasts. This tool was sponsored by the Corn Growers Association of North Carolina. Learn more about this tool, the datasets and calculations used, and a tutorial on our About Page.
1. Select Your Location
Planting Guidance Chart for 35.724°N -78.683 °E
Based on Today's Date
Corn germination is based on an accumulation of at least 40-50 GDDs over the next 4-5 days (of the current date, not the planting date). This table shows the predicted accumulation of GDDs over the next 5 days, starting with each date.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| May 11 | May 12 | May 13 69 | May 14 73 | May 15 82 | May 16 101 | May 17 104 |
| May 18 103 | May 19 103 | May 20 104 | May 21 107 | May 22 85 | May 23 65 | May 24 43 |
Numbers in each box indicate the forecasted 5-day accumulated GDDs, starting on the given date. Daily GDDs are based on NWS Forecasts for days 0-7, and on historical averages for days 8+. 5-day accumulations shown may be based on a combination of NWS forecasts and historical data.
Please Note: Actual conditions may differ from local forecasts and historical averages. We recommend you return to this tool for updated forecast information.
Please Note: Actual conditions may differ from local forecasts and historical averages. We recommend you return to this tool for updated forecast information.
Output Chart
Crop Stages
| Code | Stage | Threshold | Predicted Date | Accum GDD as of Predicted Date |
|---|---|---|---|---|
| V0 | Planted | Wed, May 13 2026 | 18 | |
| Today | Wed, May 13 2026 | 15 | ||
| V2 | Two Leaves Fully Emerged | 200 | Sat, May 23 2026 | 211 |
| V4 | Four Leaves Fully Emerged | 345 | Sat, May 30 2026 | 367 |
| V6 | Six Leaves Fully Emerged | 475 | Thu, Jun 4 2026 | 482 |
| V8 | Eight Leaves Fully Emerged | 610 | Wed, Jun 10 2026 | 631 |
| V10 | Tenth Leaf Fully Emerged | 740 | Mon, Jun 15 2026 | 760 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Sat, Jun 20 2026 | 893 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Wed, Jun 24 2026 | 1,005 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Mon, Jun 29 2026 | 1,147 |
| VT to R1 | Silks Emerging | 1,400 | Wed, Jul 8 2026 | 1,422 |
| R2 | Blister Stage | 1,660 | Thu, Jul 16 2026 | 1,664 |
| R4 | Dough Stage | 1,925 | Sat, Jul 25 2026 | 1,942 |
| R5 | Dent Stage | 2,190 | Mon, Aug 3 2026 | 2,217 |
| R6 | Black Layer | 2,450 | Wed, Aug 12 2026 | 2,475 |
Latest National Weather Service Forecast for 35.724°N -78.683 °E
| Date | Max Temp (°F) | Min Temp (°F) | Precip (in) | GDD | Stress Degree Days |
|---|---|---|---|---|---|
| Wed, May 13 2026 | 79.1 | 56.0 | 0 | 18 | 0.0 |
| Thu, May 14 2026 | 72.9 | 49.9 | 0.02 | 11 | 0.0 |
| Fri, May 15 2026 | 76.9 | N/A | 0 | N/A | 0.0 |
| 3 Day Totals | 79.13 DayMaximum | 49.93 DayMinimum | 0.023 DayAccumulation | 293 DayAccumulation | 03 DayAccumulation |
Longer-Term Climate Outlooks from NWS Climate Prediction Center
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Data Sources
Past Data Sources
- Past data from PRISM: Daily Temperature and Precipitation Gridded Product [Learn more about PRISM]
- Recent data from RTMA: National Weather Service's Real-Time Mesoscale Analysis (aggregated to daily) [Learn more about RTMA]
- Forecast data from NDFD: National Digital Forecast Database [Learn more about NDFD]
- Historical data calculated from PRISM: PRISM Daily Data averaged over past 10 years [Learn more about PRISM]
- Forecast data from NWS: National Weather Service [Learn more about NWS]
- Climate Outlooks from CPC: NWS Climate Prediction Center [Learn more about CPC]