Growing Degree Days Calculator
Accumulate growing degree days from daily high and low temperatures after clipping both observations to caller-selected lower and upper thresholds.
Description
Accumulate growing degree days from daily high and low temperatures after clipping both observations to caller-selected lower and upper thresholds.
Growing Degree Days Calculator: Accumulate growing degree days from daily high and low temperatures after clipping both observations to caller-selected lower and upper thresholds.
When to use Growing Degree Days
Use this agricultural calculation to summarize a defined weather or crop-development quantity from measurements taken on a consistent time and unit basis.
- Daily high temperatures
- Required list input.
- Daily low temperatures
- Required list input.
- Base temperature
- Required number input.
- Upper temperature threshold
- Required number input.
- Temperature unit
- Required string input.
How Growing Degree Days works
Accumulate growing degree days from daily high and low temperatures after clipping both observations to caller-selected lower and upper thresholds. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Growing degree days
- The resulting growing degree days returned as a number.
- Daily degree days
- The resulting daily degree days returned as a list.
- Degree-day unit
- The resulting degree-day unit returned as a string.
Limitations and assumptions
- Crop response varies by cultivar, growth stage, soil, water, management, pests, and microclimate. Thresholds and weather observations must match the local agronomic method before the result is used for field decisions.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Compare the result with local extension guidance, field observations, and a weather station representative of the site. Record the base temperature and any upper cutoff with accumulated values.
References
-
Growing degree-day — Wikipedia contributors
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