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 |
|---|---|---|---|---|---|---|
| Apr 28 | Apr 29 | Apr 30 | May 1 | May 2 | May 3 | May 4 |
| May 5 64 | May 6 63 | May 7 63 | May 8 81 | May 9 67 | May 10 52 | May 11 36 |
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 |
|---|---|---|---|---|
| Today | Mon, May 5 2025 | 20 | ||
| V0 | Planted | Tue, May 6 2025 | 15 | |
| V2 | Two Leaves Fully Emerged | 200 | Sat, May 17 2025 | 214 |
| V4 | Four Leaves Fully Emerged | 345 | Sat, May 24 2025 | 360 |
| V6 | Six Leaves Fully Emerged | 475 | Thu, May 29 2025 | 476 |
| V8 | Eight Leaves Fully Emerged | 610 | Wed, Jun 4 2025 | 618 |
| V10 | Tenth Leaf Fully Emerged | 740 | Tue, Jun 10 2025 | 763 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Sun, Jun 15 2025 | 893 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Thu, Jun 19 2025 | 1,000 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Tue, Jun 24 2025 | 1,139 |
| VT to R1 | Silks Emerging | 1,400 | Fri, Jul 4 2025 | 1,425 |
| R2 | Blister Stage | 1,660 | Sat, Jul 12 2025 | 1,666 |
| R4 | Dough Stage | 1,925 | Mon, Jul 21 2025 | 1,942 |
| R5 | Dent Stage | 2,190 | Wed, Jul 30 2025 | 2,215 |
| R6 | Black Layer | 2,450 | Thu, Aug 7 2025 | 2,451 |
Latest 7-Day National Weather Service Forecast for 35.724°N -78.683 °E
| Date | Max Temp (°F) | Min Temp (°F) | Precip (in) | GDD | Stress Degree Days |
|---|---|---|---|---|---|
| Mon, May 5 2025 | 79.1 | 56.0 | 0.07 | 18 | 0.0 |
| Tue, May 6 2025 | 79.1 | 56.0 | 0 | 18 | 0.0 |
| Wed, May 7 2025 | 81.0 | N/A | 0 | N/A | 0.0 |
| 3 Day Totals | 81.03 DayMaximum | 56.03 DayMinimum | 0.073 DayAccumulation | 363 DayAccumulation | 03 DayAccumulation |
Longer-Term Climate Outlooks from NWS Climate Prediction Center
| Period | Temperature Outlook (Probability) | Precipitation Outlook (Probability) |
|---|---|---|
| 6-10 days Sat, May 10 - Wed, May 14 | Normal36% probability of Normal temperatures over the next 6-10 days | Above Normal40% chance of Above Normal precipitation over the next 6-10 days |
| 8-14 days Mon, May 12 - Sun, May 18 | Above Normal50% probability of Above 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]