ck_growing_degree_days: Growing Degree Days

In climatekit: Unified Climate Indices for Temperature, Precipitation, and Drought

Growing Degree Days

Description

Sum of (Tavg - base) for all days where daily average temperature is above the base temperature (default 10 degrees C).

Usage

ck_growing_degree_days(tavg, dates, base = 10, period = "annual")

Arguments

tavg	Numeric vector of daily average temperatures (degrees C).
dates	Date vector of the same length as tavg.
base	Numeric. Base temperature in degrees C (default 10).
period	Character. Aggregation period: "annual" (default) or "monthly".

Value

A data frame with columns period, value, index, and unit.

Examples

dates <- as.Date("2024-07-01") + 0:9
tavg <- c(15, 20, 8, 12, 25, 9, 30, 11, 22, 18)
ck_growing_degree_days(tavg, dates)

climatekit documentation built on May 9, 2026, 5:08 p.m.