Having to go outside to check the temperature can be a hassle.

Planning your day and your plans getting canceled due to temperature changes can be an inconvenience.

These are some of the reasons you should own a thermometer that can measure both indoor and outdoor temperatures.

Even if you are not familiar with the lingo used in the industry, we will make it easier for you to decide which model to purchase through the buyer’s guide below.

Table of Contents

Our top indoor-outdoor thermometers picks

These are the top seven thermometer models that ticked most, if not all, features and capabilities mentioned above.

Ambient weather WS-2902C osprey WiFi 10-in-1

This is the best overall thermometer in the market you can find because of its combined basic and advanced features and functions.

It has the basic functionalities you would expect from an indoor/outdoor temperature (forecast, high and low temperature, humidity, barometric pressure, and date and time.)

Aside from these basic functionalities, it also offers high and low readings and alerts for all parameters and wind speed and direction reading. It can also monitor dew point, wind chill, heat index, rainfall, UV, and solar direction.


  • Can be integrated with smart home software
  • Has IFTTT compatibility for external device control
  • With built-in Wi-Fi for ease of connection and access to data
  • With a Solar-powered sensor operated wirelessly and is also compatible with battery
  • With an LCD display which projects input from outdoor sensor even at 330ft distance
  • With radiation shielding which encourages natural airflow, providing accurate readings


  • Setting up can be challenging
  • More expensive that its counterparts

La crosse technology C85845

This indoor-outdoor thermometer is the second on our list because it is reliable enough but not as feature-packed as the Ambient Weather model. It can show accurate temperature and humidity readings and allows alarm settings for monitoring.

It also has forecast and date and time details. This La Crosse Technology thermometer is powered by AC and its battery-operated sensors.


  • Easy to set up
  • Accurate measurement and readings
  • Easy-to-read screen with adjustable brightness
  • Radiation shields available as optional purchase


  • Cannot measure rain or wind
  • Cannot be controlled remotely
  • Cannot be integrated with smart home devices
  • Barometric pressure not shown on the console

ThermoPro TP65A indoor/outdoor thermometer

If you are looking for an affordable thermometer without compromising reliability and accuracy, the ThermoPro TP65A is the best model for you. It offers ease of setting adjustment without having to unmount it.

You won’t find it hard to check the humidity and temperature even at night because aside from its backlight function, it also has a 24-hour LCD screen. It also has icons that inform you of your home’s humidity.


  • Affordable
  • User-friendly
  • Reliable and accurate measurements
  • Large battery-powered 4” touchscreen LCD for ease of-reading
  • With a 200 ft. range outdoor sensor capable of syncing up to 3 devices
  • Comes with a standard one-year warranty and upgradable to 3 years if registered


  • Alert settings cannot be customized
  • Does not offer forecast, only humidity and temperature

Ambient Weather WS-10

The Ambient Weather WS-10 is the best model for monitoring temperature and humidity in different locations. It is possible with its battery-powered eight sensors (three remotes with the capacity to add five more). 

These eight sensors are integrated into a display console that shows audible and visual temperature and humidity updates.


  • Can support up to eight sensors
  • Optional temperature sensor for pool
  • With temperature change alert through adjustable alerts
  • Remote sensors capable of displaying humidity and temperature


  • Inconvenient battery replacement for each sensor
  • Does not show forecasts, only humidity and temperature
  • Does not support functions found in high-end counterparts
  • Needs scrolling down; can only display up to four sensors at a time

AcuRite 02027A1

For an affordable price, this AcuRite thermometer has a wide range of functions ranging from temperature and humidity indoor and outdoor readings to forecasts.

Aside from these features, the AcuRite also shows barometric pressure, moon phase, date and time, and the daily date and time readings.


  • Affordable price
  • Not difficult to set up
  • Forecast is self-calibrated and patented
  • Wall-mountable or upright standing console


  • No full range of sensors
  • No internet connectivity
  • Inability to customize alerts
  • Cannot measure wind and rainfall
  • Limited display viewing angles and may be hard to read when in direct sunlight

La crosse technology V10-TH

Despite La Crosse Technology’s limited functionality, its features are justifiable considering its price. It is capable of remote reporting, receiving alerts and push notifications through the use of the smartphone app, the La Crosse View.

Although it cannot create a local forecast, it compensates by being able to access forecasts online from the National Weather Service (NWS).


  • Offers value for your money
  • Affordable and simple device
  • With a remote sensor range of 400 ft
  • Can access forecasts from NWS through Wi-Fi


  • Cannot take local forecasts
  • Can only measure humidity and temperature

AcuRite 02081M

This thermometer is the winner in the area of visual appearance because of its compact, monochrome design. It can act as a thermometer and aesthetic calendar, and clock.

However, it lacks some of the necessary features for a thermometer, such as barometric pressure and humidity. It can only measure time and date, forecast, and temperature.


  • Not expensive
  • Attractive display
  • 16-second range data updates
  • Wireless range of up to 330 ft.


  • Cannot read humidity
  • Does not display barometric pressure
  • LCD screen not convenient with sunlight glare due to poor viewing angles

What is an indoor-outdoor thermometer for?

From the name itself, an indoor and outdoor thermometer gives you temperature readings both inside and outside your house.

This will give you an idea of whether your room temperature is very high or low or if it is normal.

It is essential to know the indoor temperature to know if you need to turn on or off your air conditioner and heater.

Knowing the outdoor temperature is also vital in order to plan your day and wear comfortable outfits appropriate for the temperature. Or if you are planning a BBQ party games, and events or spend the night out watching the planets and galaxies with a telescope.

An indoor-outdoor temperature performs both functions so you no longer need to own two different pieces of equipment.

Two types of thermometers for indoor and outdoor use

There is no need to buy separate thermometers for indoor and outdoor use. You can get the same results by just buying a thermometer capable of measuring indoor and outdoor temperature.

This kind of device, also known as an indoor-outdoor thermometer, comes in two types.

Fluid/glass thermometer

The fluid thermometer is also known as a glass thermometer. It is composed of a capillary attached to the thermometer’s bulb. The temperature reading can be found at the bulb’s end.

However, it does not offer accuracy, especially when the bulb and capillary are not aligned.

Hence, fluid/gas thermometers are best used only when a low-maintenance cost is needed. The design needs to be tinkered with for better accuracy.

It gives more accurate readings when the capillary and the bulb’s diameter are decreased and increased, respectively.

Electronic/digital thermometer

In terms of accuracy, electronic or digital thermometers offer more reliability than their glass counterparts. This is because of its various sensors that detect temperature changes.

Because the majority of these sensors are powered by a battery, they can be conveniently placed anywhere or even mounted in a wall.  There is no need to install it.

Another edge of digital thermometers is that they have a high refresh rate, which is why they offer more precise and accurate temperature readings than their fluid and gas counterparts.

Is an indoor-outdoor thermometer accurate?

A thermometer’s accuracy depends on two factors, its type, and placement. In terms of its type, electronic or digital models are more accurate than their fluid or gas counterparts.

The location of your thermometer also plays a role. A +/- 2-degree range is given for a thermometer placed in the appropriate location. For projects and studies that require very accurate readings, it is best to use a well-calibrated thermometer.

How does an indoor-outdoor thermometer work?

The important component that makes the thermometer work is the mercury inside its bulb. This mercury rises and decreases proportionately to the temperature.

Hence, when the temperature is low, the mercury level also decreases; and when the temperature is high, the mercury level also increases.

What is barometric pressure?

The amount of air pressure or the amount of pressure exerted by air molecules in the atmosphere is referred to as barometric pressure. Because the air molecules’ effort changes, barometric also varies depending on the measured location.

How does barometric pressure affect temperature?

Barometric pressure, characterized by low and high-pressure areas, can affect temperature.

Low-pressure area

A low-pressure area occurs when the atmospheric pressure is lower than its surroundings. In this case, warm air rises in the atmosphere. This is characterized by warm air and stronger winds.

Other indicators are the appearance of clouds and turbulent weather conditions. The temperature in low-pressure areas is moderate and won’t stay warm because it won’t get trapped by the clouds.

High-pressure area

A high-pressure area occurs when the atmospheric pressure is higher than its surroundings. It means that the air temperature is lower.

This is characterized by light winds, cloudless, blue skies, and calm weather. A clear sky means no clouds to trap the sun’s heat.

Wireless indoor-outdoor thermometer: a buyer’s guide

Here are some features and considerations to bear in mind when buying an indoor-outdoor thermometer to make sure that the model you get fits your needs and the location you’re in.

Minimum requirements

At the very least, your indoor-outdoor thermometer should be able to measure high and low temperatures for both indoors and outdoor. It should also be able to provide forecast, date and time, and barometric pressure.

Having a thermometer capable of reading rainfall and wind speed, and direction is a plus.

Atmospheric/ barometric pressure readings

If your place is prone to weather changes, it is best to grab an indoor-outdoor temperature capable of reading barometric pressure.

In this way, you’ll be able to predict the weather conditions using the pressure in the atmosphere.

A power source (battery or AC adapter)

Choosing an AC adapter-powered model is a cheaper and more practical option than using a battery-powered one. Using batteries needs constant replacement, especially for larger screen displays.

You may also experience brightness dimming for battery-saving. Hence, the battery is only best used as a backup power source.

If you cannot choose which power source is best for you, you may choose a model that is compatible with both power sources.

Accuracy and reliability

An indoor-outdoor thermometer temperature accuracy range of +/-2 degrees Fahrenheit is ideal. For humidity, it ranges from +/- 5 percent. It is best to refrain from buying thermometers above and below these set limits.


Smart devices connectivity

Smart device connectivity is one of the thermometer’s features that adds convenience. A thermometer with a sensor can automate your devices. Some models can even be controlled through voice assistants like Alexa.

Wifi and remote connectivity

The cloud platform Ambient Weather Network allows for data monitoring using different devices. If your thermometer has Wi-Fi connectivity, you can monitor your data from different devices and even share it online.

Hence, WiFi and remote connectivity are features to consider if you want to share and view your data remotely.

Wireless capability, range, and sensor

An indoor-outdoor thermometer with wireless capability saves you from setting up those eyesore wires. However, models like this can be more expensive.

These thermometers usually transmit and receive signals at a 200-330 feet range. This may go lower depending on the presence of wireless signals and the home’s structure.

If you have a large home, it is important to go for a model with a higher signal range.  That is why some users choose models like the Ambient Weather WS-10 because this allows for many sensors and is capable of supporting up to 8 sensors.

If you install outdoor sensors, choose a location with maximum ventilation and away from objects that radiate heat, preferably 5-6 feet away from the ground. In this way, you’ll get accurate readings.

Convenience and ease-of-use

Mounting convenience

The mounting options of your indoor display dictate how convenient it would be. Choose one with enough flexibility, capable of free-stand and wall-mounting. This way, you can conveniently place it near a power socket.

A good mounting option also means it would be easy to calibrate it once needed. Just choose a model that does not need constant calibration, as this can be inconvenient on your part.

Radiation shielding

Finding a shaded location for your sensor can be challenging. Hence, going for models with radiation shielding, such as the WS-2902C, is a great idea.

These radiation shields provide shade for your sensor without obstructing the airflow. This helps with more accurate readings.

Display, readability, and backlight

Choose a thermometer with a large, clear, and easy-to-read LCD display, may it be morning or at night. A great model which satisfies this standard is the Ambient Weather WS-2902C.

Also, consider the viewing angles so that even if your model is directly exposed to sunlight, you won’t have difficulty reading the data in it. If you want convenience when viewing the thermometer at nighttime, choose one with backlight features.

This way, you won’t have to turn on the lights to view what is on the screen.


20 dollars

If you just need it for basic use like temperature measurement, the low-price models costing around $20 are best for you. However, basic models do not offer colorful displays.

20 to 40 dollars

Indoor-outdoor thermometers that fall within this price range are in mid-level. These are capable of showing moon phases and measuring humidity.

Some models even have Wi-Fi connectivity and colored displays.

 40 to 100 dollars

These are high-end and powerful thermometers. With its price come colorful displays and Wi-Fi connectivity. It is also compatible with AC adapters and batteries as a power source.

Thermometers in this price range can show readings of barometric pressure and wind speed.


Why is it important to own an indoor-outdoor thermometer?

Having an indoor-outdoor thermometer helps you to plan your day and your activities and even know if your air conditioner or heater needs adjustment.

It makes checking the temperature more convenient by simply connecting to an application on your phone.

What is the liquid in the thermometer for, and how does a thermometer work?

The alcohol or mercury inside the thermometer’s glass tube rises or expands as it heats up. Does this mean that the hotter the location’s temperature, the more the liquid will expand?

Where should I place my outdoor thermometer?

To not compromise the readings and get accurate data, never place it in direct sunlight. Choose a spot with a shade to protect it from extreme weather conditions.

Also, choose a spot with good ventilation and away from heat-producing surfaces. It is best to put it at least 4 to six feet above the ground surface.

Where should I place my indoor thermometer?

Choose a spot indoors that is free from obstructions like thick walls and metal because this can disrupt the signal. You can hang your thermometer on a wall or mount it on a tabletop.

Same with outdoor thermometers, place them 4-6 feet above the ground for better accuracy.

Which is more accurate, a digital thermometer or a fluid thermometer?

Digital or electronic thermometers are more accurate because of their digital displays and electronic sensors.

If you want a conventional type that is easy to grab and use, you can avail of plastic or glass thermometers that come in packs at a low price.

How to check if an outdoor thermometer is accurate?

To check if your outdoor thermometer offers precise and accurate readings, the best test you can do is the boiling point or ice test.

The former is not as reliable as the latter because several factors like altitude and air pressure can affect the boiling point.

To do the ice point testing, prepare a cup of ice water and place the thermometer sensor. A reading of 0 degrees Celsius or 32 degrees Fahrenheit means that your thermometer is accurate.

What is the normal range for an indoor thermometer?

Usually, indoor thermometers have a range of -40 to 158 degrees Fahrenheit. However, this can vary depending on your preference and your location.

Do I need to calibrate my thermometer, and how frequently should I do so?

Usually, thermometers have self-calibration, so you do not have to manually do it. If you want to get more accuracy, doing calibration every month or year is enough.

What are some additional features I can find in indoor-outdoor thermometers?

Aside from measuring temperature, some thermometers are capable of showing the moon phase, setting alarms, and checking graphical interpretations.

Some models also include barometric pressure and humidity readings.


The location you’re in is one of the determinants of the factors and features to consider when purchasing a thermometer. The Ambient Weather WS-2902 C Osprey Wi-Fi 10-in-1 station is the thermometer that ticks most of these, making it the overall winner.

If you are looking for an affordable option with basic functions, the La Crosse Technology C85845 is the best model for you. Ultimately, it depends on your preferences, location, and prioritized features.

Last update on 2023-05-28 / Affiliate links / Images from Amazon Product Advertising API

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