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 |
|---|---|---|---|---|---|---|
| Jul 14 | Jul 15 | Jul 16 165 | Jul 17 164 | Jul 18 160 | Jul 19 154 | Jul 20 153 |
| Jul 21 152 | Jul 22 151 | Jul 23 149 | Jul 24 149 | Jul 25 120 | Jul 26 90 | Jul 27 61 |
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, Jul 16 2025 | 34 | |
| Today | Wed, Jul 16 2025 | 31 | ||
| V2 | Two Leaves Fully Emerged | 200 | Tue, Jul 22 2025 | 224 |
| V4 | Four Leaves Fully Emerged | 345 | Sun, Jul 27 2025 | 373 |
| V6 | Six Leaves Fully Emerged | 475 | Thu, Jul 31 2025 | 494 |
| V8 | Eight Leaves Fully Emerged | 610 | Mon, Aug 4 2025 | 611 |
| V10 | Tenth Leaf Fully Emerged | 740 | Sat, Aug 9 2025 | 757 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Wed, Aug 13 2025 | 877 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Mon, Aug 18 2025 | 1,023 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Fri, Aug 22 2025 | 1,137 |
| VT to R1 | Silks Emerging | 1,400 | Mon, Sep 1 2025 | 1,414 |
| R2 | Blister Stage | 1,660 | Thu, Sep 11 2025 | 1,670 |
| R4 | Dough Stage | 1,925 | Tue, Sep 23 2025 | 1,945 |
| R5 | Dent Stage | 2,190 | Mon, Oct 6 2025 | 2,200 |
| R6 | Black Layer | 2,450 | Mon, Oct 27 2025 | 2,454 |
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, Jul 16 2025 | 90.9 | 74.0 | 0.01 | 32 | 4.9 |
| Thu, Jul 17 2025 | 94.0 | 76.0 | 0 | 35 | 8.0 |
| Fri, Jul 18 2025 | 96.0 | 78.0 | 0.01 | 37 | 10.0 |
| 3 Day Totals | 96.03 DayMaximum | 74.03 DayMinimum | 0.023 DayAccumulation | 1043 DayAccumulation | 22.93 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]