In weather, ambient temperature refers to the current air temperature —the overall temperature of the outdoor air that surrounds us. In other words, ambient air temperature is the same thing as “ordinary” air temperature. When indoors, ambient temperature is sometimes called room temperature
 
More specifically, it is defined as 20-25°C (68-77°F), as some ambient temperatures, by nature, do not fall within this range. Generally, protocols calling for steps to be performed at RT require that temperatures do not fall below 18°C (64°F), and do not exceed 27°C (80°F).
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