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 36.226°N -76.925 °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 12 | May 13 77 | May 14 79 | May 15 77 | May 16 97 | May 17 102 | May 18 100 |
| May 19 99 | May 20 100 | May 21 99 | May 22 99 | May 23 81 | May 24 60 | May 25 40 |
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 | Tue, May 13 2025 | 20 | |
| Today | Tue, May 13 2025 | 15 | ||
| V2 | Two Leaves Fully Emerged | 200 | Fri, May 23 2025 | 213 |
| V4 | Four Leaves Fully Emerged | 345 | Thu, May 29 2025 | 346 |
| V6 | Six Leaves Fully Emerged | 475 | Wed, Jun 4 2025 | 486 |
| V8 | Eight Leaves Fully Emerged | 610 | Tue, Jun 10 2025 | 628 |
| V10 | Tenth Leaf Fully Emerged | 740 | Sun, Jun 15 2025 | 754 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Fri, Jun 20 2025 | 885 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Wed, Jun 25 2025 | 1,022 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Mon, Jun 30 2025 | 1,158 |
| VT to R1 | Silks Emerging | 1,400 | Wed, Jul 9 2025 | 1,427 |
| R2 | Blister Stage | 1,660 | Thu, Jul 17 2025 | 1,667 |
| R4 | Dough Stage | 1,925 | Sat, Jul 26 2025 | 1,938 |
| R5 | Dent Stage | 2,190 | Mon, Aug 4 2025 | 2,202 |
| R6 | Black Layer | 2,450 | Wed, Aug 13 2025 | 2,462 |
Latest 7-Day National Weather Service Forecast for 36.226°N -76.925 °E
| Date | Max Temp (°F) | Min Temp (°F) | Precip (in) | GDD | Stress Degree Days |
|---|---|---|---|---|---|
| Tue, May 13 2025 | 74.0 | 65.0 | 1.72 | 20 | 0.0 |
| Wed, May 14 2025 | 81.0 | 62.0 | 0.64 | 22 | 0.0 |
| Thu, May 15 2025 | 83.0 | N/A | 0.15 | N/A | 0.0 |
| 3 Day Totals | 83.03 DayMaximum | 62.03 DayMinimum | 2.513 DayAccumulation | 423 DayAccumulation | 03 DayAccumulation |
Longer-Term Climate Outlooks from NWS Climate Prediction Center
| Period | Temperature Outlook (Probability) | Precipitation Outlook (Probability) |
|---|---|---|
| 6-10 days Sun, May 18 - Thu, May 22 | Above Normal40% probability of Above Normal temperatures over the next 6-10 days | Above Normal33% chance of Above Normal precipitation over the next 6-10 days |
| 8-14 days Tue, May 20 - Mon, May 26 | Normal36% probability of Normal temperatures over the next 8-14 days | Above Normal33% chance of Above Normal precipitation over the next 8-14 days |
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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]