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United States Heating Degree Day map, 1961–1990 United States Cooling Degree Day map, 1961–1990. Heating degree day (HDD) is a measurement designed to quantify the demand for energy needed to heat a building. HDD is derived from measurements of outside air temperature. The heating requirements for a given building at a specific location are ...
A degree day is a measure of heating or cooling. Total degree days from an appropriate starting date are used to plan the planting of crops and management of pests and pest control timing. Weekly or monthly degree-day figures may also be used within an energy monitoring and targeting scheme to monitor the heating and cooling costs of climate ...
The 2021 Western North America heat wave was an extreme heat wave that affected much of Western North America from late June through mid-July 2021. [5] The heat wave affected Northern California, Idaho, Western Nevada, Oregon, and Washington in the United States, as well as British Columbia, and in its latter phase, Alberta, Manitoba, the Northwest Territories, Saskatchewan, and Yukon, all in ...
A heating degree day (HDD) is calculated by determining how many degrees the temperature drops below 65 °F. For example, a day with an average temperature of 50 °F is considered to have 15 HDDs.
Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology.GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.
On May 21, 2022, heat became prevalent in the Mid-Atlantic, resulting in a near record hot Preakness Stakes horse race, with Baltimore and Philadelphia having temperatures of 95 °F (35 °C), Washington DC at 92 °F (33 °C), and New York City at 90 °F (32 °C). [6] This heat persisted into May 22, when Dulles International Airport hit 91 °F ...
The Winkler Index, sometimes known as the Winkler Scale or Winkler Regions, is a technique for classifying the climate of wine growing regions based on heat summation or growing degree-days. In the system, geographical areas are divided into five climate regions based on temperature converted to growing degree-days, and is commonly known as ...
The building balance point temperature is the outdoor air temperature when the heat gains of the building are equal to the heat losses. [1] Internal heat sources due to electric lighting, mechanical equipment, body heat, and solar radiation may offset the need for additional heating although the outdoor temperature may be below the thermostat set-point temperature.