footer logo

Blog Post

Outside Temperature – How to Measure Outside Temperature?
Science & Nature

Outside Temperature – How to Measure Outside Temperature?

How to Measure Outside Temperature

Outside temperature is the outdoor temperature representing the range in which the air feels neither too cold nor too hot.

It is captured by temperature probes, placed in places protected from bad weather and direct sunlight (often on the north facade).

The primary outdoor temperature is a calculation data to determine the heat losses and, hence, the heating equipment’s power.

For example, it is -15 ° C in Strasbourg and -5 ° C in Nice. At altitude, corrections are necessary. The outdoor temperature varies throughout the year.

The cumulative deviation from a fixed room temperature is called Degree-Days and Degree-Days-Unified when the necessary indoor temperature is 19 ° C.

The Degree Days calculates energy consumption in kWh / year.

Ambient temperature definition

  • The ambient temperature generally designates the ambient medium’s temperature; it is the temperatures that people prefer for closed spaces.
  • This range is between 15 ° C (30 ° F) and 30 ° C (86 ° F) and is the field used to regulate the temperature offered by the heating or air conditioning devices.
  • The room temperature is the weather felt like a thermal sensation than the comfort temperature.
  • The World Health Organization standard for comfortable warmth is 18 ° C (64 ° F) for normal, healthy, well-dressed adults.
  • Those with respiratory problems or allergies recommend not less than 16 ° C, the sick, the disabled, the ancient, or very young, a minimum of 20 ° C.

How to measure Outside Temperature correctly?

  • How hot is it really in summer and how cold in winter? We now read the temperature almost everywhere, but the measure to accurately, there are particular rules
  • Nowadays, with the internet, we quickly access the weather data of hundreds of weather stations.
  • Furthermore, thermometers surround us almost everywhere in daily life.
  • We can read the temperature with home automation devices when we get into the car.
  • In the viewers of many businesses and commercial offices and many other places, but be careful that the data we read is incorrect.
  • There are precise rules for measuring temperature.

How to measure Outside Temperature correctly?

Temperature in a car

  • It is fashionable to photograph and post the thermometer from the car’s dashboard on social networks.
  • It triggers real races among those who are colder in winter or warmer in summer.
  • This data is often not correct, and in any case, it is poorly reliable. The engine itself can heat the probe.
  • With the car in motion, the temperature indicated by the car dashboard is closest to reality.
  • On the other hand, it can become underestimated, especially in winter, for example, if ice forms or snow deposits on the probe.
  • Even the digital thermometers placed in the street signs of shops and various offices are not very reliable.
  • They often do not have any screen, especially on sunny days they indicate much higher temperatures than reality.
  • In short, if you read 45 ° C in a thermometer, it does not mean at all that this is the actual temperature. So what is the right weather?

Air temperature

  • Sometimes we hear about the temperature in the shade. ” This diction is incorrect. One does not distinguish between temperature in the shade or the sun.
  • The measurement of atmospheric temperature is quite complicated. We have to measure the air temperature, which is a bad thermal conductor by its nature.
  • A ” representative sample of air ” must be created, as well as shielding the thermometer to prevent the measurement from being altered by the direct effect of the sun’s rays.
  • To be able to compare the data from different locations, they must then measured under standard conditions.
  • The World Meteorological Organization (WMO) recommends measuring a sufficient distance from obstacles, buildings, etc., and heat sources.
  • The thermometer must be placed in a unique screen, 2 meters above the ground, on grassy ground, or in any case representative of a vast surrounding area.
  • Traditionally, the temperature and relative humidity took place in the unique and fascinating “meteorological hut. “
  • Today, electronic sensors are very popular with an individual screen that allows air to circulate and prevents the sun from overheating the sensor.


Tips for measuring Outside Temperature

  • If you want to measure your home or garden temperature, possibly choose electronic instruments equipped with the appropriate screen.
  • And place the probe in the garden, away from walls and fences, hedges, bushes, and especially trees.
  • A compromise can be a large terrace in the city, at least 2 meters from the surface. Avoid balconies and pitched roofs and do not use the TV antenna as support.
  • An economical solution is the classic wall thermometer. In that case, please choose a side where the sun never shines, but don’t expect more than a rough indication of how hot or cold it is.
  • In short, to know the actual temperature and measured it with technical and scientific standards.
  • It would be best if you relied on the WMO world network or regional meteorological services stations.

5 Tips for installing your thermometer correctly

  • With the imminent arrival of autumn, the temperatures are plays tricks on us.
  • Sometimes hot, sometimes chilly, the weather is changeable from day Today. In the morning, it is sometimes even difficult to know how to dress!
  • For this reason, it can be useful to have your outdoor thermometer. Here are five tips to optimize your installation.

1. Place your thermometer in the shade

  • To prevent the sun’s rays from causing your thermometer’s mercury to rise, avoid placing it in a sunny location.
  • If possible, place it north. As the sun moves east to west, it will not land directly on the instrument.

2. Avoid heat sources

  • To avoid biasing the thermometer results, avoid placing it near a heat source.
  • Various materials, such as asphalt and metal, store heat efficiently, which could affect results.

Avoid heat sources

3. Ensure air circulation

  • When choosing a location for this measuring instrument, make sure it is a place where air can circulate freely.
  • For example, in a confined space in an outdoor pavilion, the air can remain immobilized more easily.
  • If it does not circulate, this air can have a temperature that varies from the ambient air.

4. Fix it at the right height

  • Whether the ground is cold or even hot, it must not significantly influence the given outside temperature.
  • Ideally, the thermometer should be placed 1.5 meters from the ground. If the vegetation is long, increase the height accordingly.

Fix it at the right height

5. Protect it from precipitation

  • Even if the thermometer is outdoors, it should not be at the mercy of the vagaries of the weather.
  • In order not to damage the device, it must be away from precipitation. Besides, the temperature of raindrops or flakes could distort the results.

Related posts