ck_heating_degree_days: Heating Degree Days

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

Heating Degree Days

Description

Sum of (base - Tavg) for all days where daily average temperature is below the base temperature (default 18 degrees C).

Usage

ck_heating_degree_days(tavg, dates, base = 18, 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 18).
period	Character. Aggregation period: "annual" (default) or "monthly".

Value

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

Examples

dates <- as.Date("2024-01-01") + 0:9
tavg <- c(5, 10, 15, 20, 8, 12, 18, 3, 25, 7)
ck_heating_degree_days(tavg, dates)

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