Degree day

Heating degree days are summations of negative differences between the mean daily temperature and the 18 °C base; cooling degree days are summations of positive differences from the same base.

**Heating Degree Days** A heating degree day is the departure of one degree per day in the mean daily temperture from a standard reference temperature of usually 65 degrees F.

Degree Day - a measure of the difference between the mean daily temperature and some given base temperature: one degree day is given for each degree (degree Celsius or degree Fahrenheit) of departure above (or below) the base temperature during one ...

Degree days Computed from each day's mean temperature (max+min/2). For each degree that a day's mean temperature is below or above a reference temperature is counted as one degree day.

Degree Day - A measure of departure from the mean daily temperature. One degree day occurs when the daily mean temperature is above or below 65 degrees Fahrenheit.

Degree Day- a measure of the departure of the daily mean temperature from the normal daily temperature; heating and cooling Degree Days are the departure of the daily mean temperature from sixty-five degrees Fahrenheit.

DEGREE DAY A measure of the departure of the mean daily temperature from a given standard. That is one degree day for each degree (Fahrenheit or Celsius) of departure above or below the standard during one day.

Heating Degree Day see Degree Day. Heat Index The Heat Index (HI) or the "Apparent Temperature" is an accurate measure of how hot it really feels when the Relative Humidity (RH) is added to the actual air temperature.

cooling degree day: a measurement used to determine how much fuel will be needed to cool indoor environments. There is one cooling degree-day unit for each degree that the mean daily temperature departs from 65 °F or 18 °C.

Growing Degree Day The number of degrees that the average temperature is above a baseline value.

Cooling Degree Days(3) A form of degree-day used to estimate energy requirements for air conditioning or refrigeration. Coral bleaching(2) ...

Cooling Degree Day (CDD)- useful in determining cooling energy requirements. Defined as (MT - 65)= CDD,where MT is Mean Temperature (F). If MT is less than 65 degrees F, CDD=0. MT= Mean (average)Temperature of the day.

COOLING DEGREE DAY A cooling degree day is given for each degree that the daily mean temperature departs above the baseline of 75 degrees Fahrenheit.

Degree DayA measure that gauges the amount of heating or cooling needed for a building using 65 degrees as a baseline.

Degree day A unit that represents one degree of deviation from a reference point in the mean daily outdoor temperature (usually 65°F) and that is used to measure heating and cooling requirements.

CDDCooling Degree Days- A form of degree day used to estimate energy requirements for air conditioning or refrigeration. Typically, cooling degree days are calculated as how much warmer the mean temperature at a location is than 65°F on a given day.

T0410 Thawing index The number of degree days, above and below 0°C, between the lowest and highest points on the cumulative degree days time curve for one thawing season.

See also: Degree, Temperature, Weather, Meteor, Thunder