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 20 | Jul 21 125 | Jul 22 120 | Jul 23 122 | Jul 24 153 | Jul 25 155 | Jul 26 155 |
| Jul 27 155 | Jul 28 154 | Jul 29 152 | Jul 30 149 | Jul 31 119 | Aug 1 89 | Aug 2 59 |
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, Jul 21 2026 | 35 | |
| Today | Tue, Jul 21 2026 | 31 | ||
| V2 | Two Leaves Fully Emerged | 200 | Mon, Jul 27 2026 | 218 |
| V4 | Four Leaves Fully Emerged | 345 | Sat, Aug 1 2026 | 372 |
| V6 | Six Leaves Fully Emerged | 475 | Wed, Aug 5 2026 | 485 |
| V8 | Eight Leaves Fully Emerged | 610 | Mon, Aug 10 2026 | 628 |
| V10 | Tenth Leaf Fully Emerged | 740 | Fri, Aug 14 2026 | 748 |
| V12 | Twelfth Leaf Fully Emerged | 870 | Wed, Aug 19 2026 | 896 |
| V14 | Fourteenth Leaf Fully Emerged | 1,000 | Sun, Aug 23 2026 | 1,008 |
| V16 | Sixteenth Leaf Fully Emerged | 1,135 | Fri, Aug 28 2026 | 1,144 |
| VT to R1 | Silks Emerging | 1,400 | Mon, Sep 7 2026 | 1,409 |
| R2 | Blister Stage | 1,660 | Fri, Sep 18 2026 | 1,670 |
| R4 | Dough Stage | 1,925 | Wed, Sep 30 2026 | 1,934 |
| R5 | Dent Stage | 2,190 | Fri, Oct 16 2026 | 2,201 |
| R6 | Black Layer | 2,450 | Sun, Nov 22 2026 | 2,451 |
Latest National Weather Service Forecast for 35.724°N -78.683 °E
| Date | Max Temp (°F) | Min Temp (°F) | Precip (in) | GDD | Stress Degree Days |
|---|---|---|---|---|---|
| Tue, Jul 21 2026 | 94.0 | 76.9 | 0 | 35 | 8.0 |
| Wed, Jul 22 2026 | 90.9 | 69.0 | 0.28 | 30 | 4.9 |
| Thu, Jul 23 2026 | 79.1 | N/A | 1.8 | N/A | 0.0 |
| 3 Day Totals | 94.03 DayMaximum | 69.03 DayMinimum | 2.083 DayAccumulation | 653 DayAccumulation | 12.93 DayAccumulation |
Longer-Term Climate Outlooks from NWS Climate Prediction Center
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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]