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 21 | Jul 22 | Jul 23 | Jul 24 | Jul 25 175 | Jul 26 176 | Jul 27 168 |
| Jul 28 158 | Jul 29 150 | Jul 30 149 | Jul 31 147 | Aug 1 117 | Aug 2 87 | Aug 3 57 |
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 | Fri, Jul 25 2025 | 29 | ||
| V0 | Planted | Sat, Jul 26 2025 | 39 | |
| V2 | Two Leaves Fully Emerged | 200 | Thu, Jul 31 2025 | 228 |
| V4 | Four Leaves Fully Emerged | 345 | Mon, Aug 4 2025 | 345 |
| V6 | Six Leaves Fully Emerged | 475 | Sat, Aug 9 2025 | 491 |
| V8 | Eight Leaves Fully Emerged | 610 | Wed, Aug 13 2025 | 610 |
| V10 | Tenth Leaf Fully Emerged | 740 | Mon, Aug 18 2025 | 757 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Fri, Aug 22 2025 | 871 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Wed, Aug 27 2025 | 1,006 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Mon, Sep 1 2025 | 1,148 |
| VT to R1 | Silks Emerging | 1,400 | Thu, Sep 11 2025 | 1,403 |
| R2 | Blister Stage | 1,660 | Tue, Sep 23 2025 | 1,679 |
| R4 | Dough Stage | 1,925 | Mon, Oct 6 2025 | 1,934 |
| R5 | Dent Stage | 2,190 | Tue, Oct 28 2025 | 2,197 |
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 |
|---|---|---|---|---|---|
| Sat, Jul 26 2025 | 99.0 | 76.9 | 0 | 38 | 13.0 |
| Sun, Jul 27 2025 | 99.9 | 78.0 | 0.01 | 39 | 13.9 |
| Mon, Jul 28 2025 | 98.0 | 78.0 | 0.01 | 38 | 12.0 |
| 3 Day Totals | 99.93 DayMaximum | 76.93 DayMinimum | 0.023 DayAccumulation | 1153 DayAccumulation | 38.93 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]