MEAN TEMPERATURE
The average of temperature readings taken over a specified amount of time. Often the average of the maximum and minimum temperatures.
Mean Temperature The average of a series of temperatures taken over a period of time, such as a day or a month.
Measurable Precipitation of 0.01" or more.
Medium Range In forecasting, (generally) three to seven days in advance.
Daily Mean Temperature - The mean temperature for a day that is determined by averaging the hourly readings or
more commonly, by averaging the maximum and minimum temperatures for a day.
When the mean temperature on a givin day is 65 degrees F., or higher, that day is not considered in making the monthly total. For example.
THICKNESS The thickness of a layer in the atmosphere is proportional to the mean temperature of that whole layer. The layer most often used in meteorology is between 1000 and 500 millibars.
Mean temperature The average temperature of the air as indicated by a properly exposed thermometer for a given time period, usually a day, a month, or a year.
Typically, heating degree days are calculated as how much colder the mean temperature at a location is than 65°F on a given day.
microthermal climate"A type of climate characterized by low annual mean temperatures (between 0° and 14°C), that is, a region of genuine winter emphasized by the usual snow mantle, and a true, although many times short, ...
This is done by drawing a line through geographic points where the mean temperature for the warmest month (usually July) is equal to 51.4 - 0.1k, where k is equal to the mean temperature of the coldest month (usually January).
As already noted elsewhere, the values of the (total) thickness between levels at 500hPa and 1000hPa give a useful measure of the mean temperature of that layer.
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 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.
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.
Temperature variations over Australia during the past century have been consistent with global trends in showing an increase in the mean temperature (average of daytime maximum and overnight minimum temperatures) over most of the continent.
Monthly Climatic Data of the World (MCDW): This National Climatic Data Center (NCDC) publication contains monthly mean temperature, pressure, precipitation, vapor pressure, and sunshine for approximately 2, ...
A cooling degree day is given for each degree that the daily mean temperature departs above the baseline of 75 degrees Fahrenheit.
HEATING DEGREE DAY One heating degree day is given for each degree that the daily mean temperature is below 65°F. It is used as an indication of fuel consumption. Related terms: degree day or cooling degree day ...
The term refers to the mean temperature of the ocean in the upper few meters.
Seas ...
Climates in which the mean temperature of the warmest month is below 10C; climates that are too cold to support the growth of trees.
Hypsithermal An extended mild episode between about 5000 and 7000 years ago when global mean temperature was somewhat higher (perhaps 1 Celsius degree) than at present.
I ...
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.
Sea Surface Temperatures (SSTs) - The term refers to the mean temperature of the ocean in the upper few meters.
Growing Degree Day - A form of degree day to estimate the approximate dates when a crop will be ready to harvest. one growing degree day occurs when the daily mean temperature is one degree above the minimum temperature required for the growth ...
However charts are also produced for thicknesses of other layers in the atmosphere as well. The thickness gives an indication of the mean temperature within a layer; lower thicknesses indicate colder air, higher thicknesses warmer air.
 See also: Temperature, Weather, Surface, Air, Pressure
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