Examples
Examples
Try the starting example
- Daily minimum temperatures (°C)
- 5,10,15
- Daily maximum temperatures (°C)
- 15,30,35
- Base temperature (°C)
- 10
- Upper threshold (°C)
- 30
- Method: mean-cap or endpoint-cap
- endpoint-cap
- Daily growing degree-days (°C·day)
- 2.5, 10, 12.5
- Cumulative growing degree-days (°C·day)
- 25
- Method used
- endpoint-cap
Try another scenario
- Daily minimum temperatures (°C)
- 5,10,15
- Daily maximum temperatures (°C)
- 15,30,35
- Base temperature (°C)
- 10
- Upper threshold (°C)
- 30
- Method: mean-cap or endpoint-cap
- mean-cap
- Daily growing degree-days (°C·day)
- 0, 10, 15
- Cumulative growing degree-days (°C·day)
- 25
- Method used
- mean-cap
Calculation method
Calculation method
Daily growing degree-days (°C·day)
Endpoint-cap: clamp each daily minimum and maximum to [base, upper], average, then subtract base. Mean-cap: average raw endpoints first, clamp that mean to [base, upper], then subtract base.
Cumulative growing degree-days (°C·day)
Sum daily degree-days; each is non-negative.
Method used
Explicitly identify the selected threshold convention.
Symbols and units
- a
- Daily minimum temperatures (°C)
- b
- Daily maximum temperatures (°C)
- c
- Base temperature (°C)
- d
- Upper threshold (°C)
- e
- Method: mean-cap or endpoint-cap
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Two explicit degree-day arithmetic conventions using your supplied crop thresholds. They can give different results. Neither convention is a universal crop-development model or maturity prediction.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
UMN Extension: growing degree-day threshold convention ↗
Background reading; this does not imply endorsement or independent review of SumFizz.