We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is an Outdoor Thermometer?

Deanna Baranyi
By
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

An outdoor thermometer is a scientific instrument that reads the temperature of the air outside. There are three main kinds of outdoor thermometers: the bulb thermometer, the bimetallic strip thermometer, and the digital thermometer. Each kind operates in a slightly different manner, but all work to allow people to read the temperature outside.

A bulb outdoor thermometer is the most basic type. It is typically made of glass and filled with mercury. As the temperature rises, the mercury changes in volume. As a result, the mercury moves up the glass tube. In the alternative, if the temperature goes down, the mercury takes up less space in the glass tube and goes down.

Although a mercury-filled outdoor thermometer is an accurate way to tell the temperature, it can be problematic. Mercury is a toxic substance. If the thermometer breaks and the mercury leaks out of the glass tube, it must be cleaned up properly to prevent serious medical issues.

The bimetallic strip outdoor thermometer looks like a dial. It is made from a spring-like coil. The coil is comprised of two kinds of metal pieces that are attached in a way to gauge the temperature outside. It works when the two metal pieces expand or contract at different rates. For example, if one piece of metal retains heat, the coil will be forced to expand, and the hand of the dial will creep upward. If the temperature drops, the metal will cool faster, contracting the coil, and moving the dial hand downward.

The digital or electronic outdoor thermometer is the most modern and is also considered to be the most accurate. Inside the thermometer is a thermoresistor that alters its resistance according to the temperature. Next, a sensor on the micro-computer reads the temperature and digitally displays it.

There are countless style options for all kinds of outdoor thermometers. They can be discreet or quite large, such as the ones outside banks. They can be hung away from the house, suctioned to a window, or staked in a garden. While digital outdoor thermometers may require a new set of batteries from time to time or a separate power source, a bulb or dial thermometer will not. In addition, some light up at night, making it easy to read the temperature when it is dark outside. Some models have only one sensor, but more expensive models have multiple sensors that can be placed in various areas on the property and lend to the most accurate readings.

Regardless of the type of outdoor thermometer, placement is one of the most important factors for an accurate reading. It should be in a shady area with plenty of air flow. In addition, it should be placed at least five feet (1.52 m) above natural ground, such as grass or dirt—not above asphalt. In fact, it should be located no closer than 100 feet (30.5 m) to a street or to concrete. Placing it near sprinkler systems or tall buildings may cause an inaccurate reading as well.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Deanna Baranyi
By Deanna Baranyi
Deanna Baranyi, a freelance writer and editor with a passion for the written word, brings a diverse skill set to her work. With degrees in relevant fields and a keen ability to understand and connect with target audiences, she crafts compelling copy, articles, and content that inform and engage readers.
Discussion Comments
By anon938884 — On Mar 11, 2014

I had a cheap thermometer in my raised garden with a cold frame that provided veggies all winter long, but just saw that the bulb on bottom of the very cheap small thermometer was broken, and it was sitting on the dirt in a corner.

Will that poison all my dirt in this raised bed garden? This is very upsetting to me. Broccoli is growing in there and green onions so nicely too.

Deanna Baranyi
Deanna Baranyi
Deanna Baranyi, a freelance writer and editor with a passion for the written word, brings a diverse skill set to her...
Learn more
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.