Paar im Garten vor modernem Haus, schaut lächelnd aufs Smartphone

Temperature and humidity sensor – outdoor

With the smart outdoor temperature and humidity sensor, you can always keep an eye on the weather and control various functions in the smart home.

Temperature and humidity sensor – outdoor

Keep an eye on temperature and humidity

Winter, when the outside temperature is freezing, is exactly the time when you'd prefer to keep your windows closed to keep the heat inside the house. However, insufficiently frequent ventilation can cause mould to develop. With the Homematic IP temperature and humidity sensor for outdoor use, you can minimise this risk the smart way. The humidity indoors and outdoors is permanently compared in combination with a Homematic IP wall thermostat with humidity detection. You then receive a ventilation recommendation in your app when needed, and only need to ventilate when it is really necessary.

Handy mit Auge

Keeping an eye on humidity

The sensor measures the temperature and humidity in your outdoor area. You can view all measured values in the Homematic IP app.

offenes Fenster

Intelligent ventilation recommendation

Permanently reduce the risk of mould in your home with the smart ventilation recommendation. 

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In conjunction with a wall thermostat with humidity sensor (e.g. HmIP-WTH-2), the units always balance the humidity indoors and outdoors. We can send you a ventilation recommendation if you want one. 

Sonne mit Jalousie

Smart shading

By means of automatic shading, the intelligent thermal protection prevents your living spaces from overheating in summer. 

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In conjunction with the Homematic IP shutters actuator (e.g. HmIP-FROLL) your house will stay cool even when temperatures outdoors are high. 

Haken mit Funkwellen

Easy installation 

Just mount the sensor on a wall or place it on a shelf outside.

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The right anchors and screws are included for uncomplicated wall mounting.

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Schedule shade

Moderne Hausfassade mit Holzterrasse, Sitzmöbeln und grünem Garten bei Sonne
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Deter burglars

Modernes weißes Haus mit Fenster, Schiebetür und Außenlampen am Weg
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Use the app

Lächelnder Mann hält Smartphone und gelbe Flasche in Wohnzimmer, unscharfer Hintergrund.
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Understand our products

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05. July 2023

Travel with a safe feeling: How to protect your home with smart home technology

No one there to look after the house during the holidays? No problem, because your Smart Home protects itself: It keeps burglars away and lets you know immediately if something should happen.

Find out more

Homematic IP: Smart living. Simply exciting.

Homematic IP means modern, flexible and secure technology from the European market leader*. Let the advantages of our system win you over, and start living smarter straight away. 

Person auf Sofa hält Smartphone mit geöffneter Homematic-IP App, gemütliches Wohnzimmer.

The Homematic IP app

Configure all settings for your smart home in the Homematic IP app, which you can use to control, regulate and monitor your devices at any time. No personal data is collected except for the IP address.

Always here for you and your queries.

Whether you have a question about a product, something isn’t working as you wanted, you’re looking for a specialist partner, or you simply want to give us feedback: we are always here to help.

FAQ

FAQs

This is where you’ll find the most important questions and our answers about our smart home solutions.

Service

Service

Have you purchased a Homematic IP product and now have questions about how it works? Our technical support team will be happy to help you.

Installateur Suche

Specialist tradespeople

Are you looking for a good specialist tradesperson near you? Simply use the convenient search function here on our website.

Händler Suche

Dealers

You can get Homematic IP products and good advice all over Germany. Find the right dealer near you here.

Innovations, ideas, impulses: your news

Get first-hand news about the latest innovative smart home solutions. 

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Product Variants

Temperature and humidity sensor – outdoor

Order information

Product Name (Short)
HmIP-STHO
Item Number
150573A0
EAN Code
4047976505739

Technical data

Supply voltage
2x 1.5 V LR6/Mignon/AA
Current consumption
30 mA max.
Typical battery life
5 years (typical)
Degree of protection
IP44
Dimensions (W x H x D)
59 x 82 x 41 mm
Ambient temperature
-20 to +55 °C
Weight
100 g (including batteries)
Radio frequency
868.0-868.6 MHz/869.4-869.65 MHz
Typ. open area RF range
220 m
Measuring range humidity
0 to 99 %
Measuring range temperature
-20 to +55 °C
Function type
Weather sensor
Connection
Wireless
Color
white
Accuracy humidity
± 3 % (in the range 20 to 80 %)
Accuracy temperature
± 0.3 °C (in the range 5 to 60 °C)
Homematic IP User Guide

Version: July 2025

20.99 MB
Overview of QR code stickers
1.46 MB
Operating manual Temperature and Humidity Sensor – outdoor

Short description: HmIP-STHO | Product reference: 150573A0

3.32 MB
Datasheet Temperature and Humidity Sensor – outdoor

Short description: HmIP-STHO / HmIP-STHO-A | Product reference: 150573A0 / 150574A0

1.08 MB
Declaration of conformity Temperature and Humidity Sensor – outdoor

Short description: HmIP-STHO | Product reference: 15057AxC

126.89 KB