Weather tools
Growing Degree Day (GDD) Calculator
Calculates the accumulated Growing Degree Days (GDD) for a specific period, which is a measure of heat accumulation used to predict plant growth and development.
Before you use this tool
Use this if
- Calculates the accumulated Growing Degree Days (GDD) for a specific period, which is a measure of heat accumulation used to predict plant growth and development.
- You want a calculation that exposes its formula: GDD = Σ [(Daily High Temperature + Daily Low Temperature) / 2] - Base Temperature (Summed over the specified period)
- You already have Base Temperature, Start Date, End Date values to enter.
Skip this if
- You need an official emergency alert or life-safety instruction.
- You need a certified professional forecast instead of a calculator estimate.
When to use or skip it
Use this if
- Calculates the accumulated Growing Degree Days (GDD) for a specific period, which is a measure of heat accumulation used to predict plant growth and development.
- You want a calculation that exposes its formula: GDD = Σ [(Daily High Temperature + Daily Low Temperature) / 2] - Base Temperature (Summed over the specified period)
- You already have Base Temperature, Start Date, End Date values to enter.
Skip this if
- You need an official emergency alert or life-safety instruction.
- You need a certified professional forecast instead of a calculator estimate.