Weather tools
Chilling Hours Calculator
Calculates the accumulated chilling hours for a specified period, which is the number of hours below a critical temperature required by some plants to break dormancy and flower properly.
Before you use this tool
Use this if
- Calculates the accumulated chilling hours for a specified period, which is the number of hours below a critical temperature required by some plants to break dormancy and flower properly.
- You want a calculation that exposes its formula: Chilling Hours = Σ (Hours with Temperature ≤ Critical Temperature) (Summed over the specified period)
- You already have Critical 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 chilling hours for a specified period, which is the number of hours below a critical temperature required by some plants to break dormancy and flower properly.
- You want a calculation that exposes its formula: Chilling Hours = Σ (Hours with Temperature ≤ Critical Temperature) (Summed over the specified period)
- You already have Critical 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.