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 |
|---|---|---|---|---|---|---|
| Jun 16 | Jun 17 134 | Jun 18 135 | Jun 19 138 | Jun 20 139 | Jun 21 141 | Jun 22 142 |
| Jun 23 142 | Jun 24 141 | Jun 25 139 | Jun 26 139 | Jun 27 112 | Jun 28 84 | Jun 29 56 |
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, Jun 17 2025 | 27 | |
| Today | Tue, Jun 17 2025 | 27 | ||
| V2 | Two Leaves Fully Emerged | 200 | Tue, Jun 24 2025 | 220 |
| V4 | Four Leaves Fully Emerged | 345 | Sun, Jun 29 2025 | 359 |
| V6 | Six Leaves Fully Emerged | 475 | Thu, Jul 3 2025 | 476 |
| V8 | Eight Leaves Fully Emerged | 610 | Tue, Jul 8 2025 | 630 |
| V10 | Tenth Leaf Fully Emerged | 740 | Sat, Jul 12 2025 | 747 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Thu, Jul 17 2025 | 901 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Mon, Jul 21 2025 | 1,023 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Fri, Jul 25 2025 | 1,144 |
| VT to R1 | Silks Emerging | 1,400 | Sun, Aug 3 2025 | 1,415 |
| R2 | Blister Stage | 1,660 | Tue, Aug 12 2025 | 1,678 |
| R4 | Dough Stage | 1,925 | Thu, Aug 21 2025 | 1,941 |
| R5 | Dent Stage | 2,190 | Sun, Aug 31 2025 | 2,218 |
| R6 | Black Layer | 2,450 | Tue, Sep 9 2025 | 2,452 |
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 |
|---|---|---|---|---|---|
| Wed, Jun 11 2025 | 87.0 | 69.0 | 0.01 | 28 | 1.0 |
| Thu, Jun 12 2025 | 90.0 | 71.0 | 0.06 | 31 | 4.0 |
| Fri, Jun 13 2025 | 88.1 | N/A | 0.08 | N/A | 2.1 |
| 3 Day Totals | 90.03 DayMaximum | 69.03 DayMinimum | 0.153 DayAccumulation | 593 DayAccumulation | 7.13 DayAccumulation |
Longer-Term Climate Outlooks from NWS Climate Prediction Center
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| Period | Temperature Outlook (Probability) | Precipitation Outlook (Probability) |
|---|
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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]