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  2. Fever - Wikipedia

    en.wikipedia.org/wiki/Fever

    Fever is generally agreed to be present if the elevated temperature [31] is caused by a raised set point and: Temperature in the anus (rectum/rectal) is at or over 37.5–38.3 °C (99.5–100.9 °F). [1] [8] An ear (tympanic) or forehead (temporal) temperature may also be used. [32] [33]

  3. Human body temperature - Wikipedia

    en.wikipedia.org/wiki/Human_body_temperature

    An early morning temperature higher than 37.3 °C (99.1 °F) or a late afternoon temperature higher than 37.7 °C (99.9 °F) is normally considered a fever, assuming that the temperature is elevated due to a change in the hypothalamus's setpoint. [15] Lower thresholds are sometimes appropriate for elderly people. [15]

  4. Fahrenheit - Wikipedia

    en.wikipedia.org/wiki/Fahrenheit

    A temperature interval of 1 °F was equal to an interval of 5 ⁄ 9 degrees Celsius. With the Fahrenheit and Celsius scales now both defined by the kelvin, this relationship was preserved, a temperature interval of 1 °F being equal to an interval of 5 ⁄ 9 K and of 5 ⁄ 9 °C. The Fahrenheit and Celsius scales intersect numerically at −40 ...

  5. Celsius - Wikipedia

    en.wikipedia.org/wiki/Celsius

    Anders Celsius's original thermometer used a reversed scale, with 100 as the freezing point and 0 as the boiling point of water.. In 1742, Swedish astronomer Anders Celsius (1701–1744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. [5]

  6. Kelvin - Wikipedia

    en.wikipedia.org/wiki/Kelvin

    It was often called the "absolute Celsius" scale in the early 20th century. [6] The kelvin was formally added to the International System of Units in 1954, defining 273.16 K to be the triple point of water. The Celsius, Fahrenheit, and Rankine scales were redefined in terms of the Kelvin scale using this definition.

  7. Degree (temperature) - Wikipedia

    en.wikipedia.org/wiki/Degree_(temperature)

    Common scales of temperature measured in degrees: Celsius (°C) Fahrenheit (°F) Rankine (°R or °Ra), which uses the Fahrenheit scale, adjusted so that 0 degrees Rankine is equal to absolute zero. Unlike the degree Fahrenheit and degree Celsius, the kelvin is no longer referred to or written as a degree (but was before 1967 [1] [2] [3]). The ...

  8. Room temperature - Wikipedia

    en.wikipedia.org/wiki/Room_temperature

    Room temperature, colloquially, denotes the range of air temperatures most people find comfortable indoors while dressed in typical clothing.

  9. Climate of Phoenix - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Phoenix

    Generally speaking, the annual minimum temperature in Phoenix is in the mid-to-low 30s. It rarely drops to 32 °F (0 °C) or below, having done so in only nine of the years between 1991 and 2020 on a total of seventeen days. [6] However, peripheral portions of the Phoenix metropolitan area frequently see frost in the winter. The earliest freeze ...