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What Is the Temperature Limit for Giving Your Baby to Sleep Outside?

In Nordic countries, the outdoor temperature limit for babies is considered to be around -10 °C to -15 °C (14°F - 5°F). Newborn babies are not yet used to such temperatures and need to be acclimated for short periods at a time over several weeks. Ask more information and advices from the local maternity clinic.

Babies sleep better outside than inside, so the temptation to have your baby sleep outside may arise even in colder weather. However, in this case the duration of staying outside should be reduced But how can you conveniently know that conditions in the stroller are not too cold or too hot? With the RuuviTag, a wireless thermometer, you can easily measure and monitor the conditions in your stroller or pram and receive real-time temperature and humidity readings directly on your phone!

In winter, when it’s freezing cold, the temperature inside a stroller or pram can drop to very low levels. On the other hand, in summer, darker strollers can get too hot surprisingly quickly when left in sunshine. According to some measurements, the temperature in strollers can reach up to 50 °C (120°F) in summer heat under direct sunlight. Babies are less able to regulate their own body temperature, so knowing the temperature inside the stroller is particularly important.

Ruuvi’s sensors offer a handy and accurate way to measure your baby’s environmental conditions in the pram. Place the wireless RuuviTag in the stroller and receive the measurement data directly on your phone. In addition, you can set your own alarms for temperature values in the Ruuvi Station app. For example, you can set a temperature alarm of 25 °C (77 °F), so if the temperature in the stroller rises above that value, you’ll be notified directly on your phone! This is particularly handy if you want to leave a sleeping baby outside for a while, for example.

Measuring the temperature inside stroller or pram in summer

As mentioned above, measuring the temperature is particularly important in summer, as the temperature in the pram can become too high unexpectedly quickly. During summer, it is advisable to place the RuuviTag next to the child in the pram so that it is not in direct contact with the child. In this case, the baby’s body temperature will not affect the measurement values. The measuring device should be placed inside the pram. It can also be attached to the pram using, for example, zip ties and a silicone clamp. In this case, the thermometre is always with you on every trip. We also recommend setting an upper limit temperature alarm to notify you if the temperature rises too much.

Measuring the temperature in stroller or pram in winter

In winter, measuring the temperature is a little more challenging than in summer, as the temperature inside the stroller does not reflect the temperature perceived by the baby due to the layering of clothing. On the other hand, the baby’s body temperature can also affect the measurement.

It is advisable to place the measuring device inside the baby’s innermost sleeping bag, close to the toes. In this way, the measurement will be closest to the temperature experienced by the baby and the baby’s own body temperature will not significantly influence the measurement. On the other hand, you can also place the measuring device outside the sleeping bag, so you are aware of the temperature in which the baby’s face is.

In winter, it’s a good idea to use a RuuviTag, which is already measuring outside conditions, so the metre doesn’t need to take time to cool down to outdoor temperatures first, and you can start getting accurate measurements in the stroller right away. If you are using a separate RuuviTag for the stroller, it’s a good idea to take it outside before you take out the stroller, to get the thermometer to reach the correct temperature ahead of time.

Buy a Wireless Thermometer And Always Know The Temperature Inside Strollers
With wireless RuuviTag you will have all the measurements and alerts directly on your phone

Buy a Wireless Thermometer And Always Know The Temperature Inside Strollers

With wireless RuuviTag you will have all the measurements and alerts directly on your phone


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RuuviTag is a Bluetooth sensor that monitors environmental conditions and sends the data directly to your mobile device. The Ruuvi Station mobile app allows you to view real-time accurate measurements and historical graphs. The app also provides customisable alerts to notify you of critical conditions, such as a melting freezer, excessively high bedroom temperatures that could disrupt sleep, or elevated humidity levels in your basement.

Onboard Sensors (4-in-1)

Temperature: °C, °F, K; typical accuracy ±0,2 °C @ 5-60 °C (±0.36 °F @ 41-140 °F).
Air humidity: RH-%, g/m3, dew point; typical accuracy ±3 RH-% @ 20…80 %. Range: 0-95 %.
Air pressure: Pa, hPa, mmHg, inHg; typical accuracy ±1 hPa. Range: 500-1155 hPa.
Motion: Movement counter. Counter is incremented when acceleration exceeds the threshold on any axis.

Operational Conditions

Operating temperature (with stock battery): -20 °C to +70 °C (-4 °F to 158 °F).
Absolute maximum operating temperature: -40 °C to +85 °C (-40 °F to +185 °F).
Housing: IP67, splash-proof, non-condensing location.
Battery: User-replaceable CR2477 (included). Supports extended operating temperature range battery CR2477T.
Battery lifespan: Estimated 12 to 24 months.
Bluetooth range: 5-20 meters (indoor), 20-100 meters (outdoor). The sensitivity of the receiving mobile device’s antenna, obstacles and wall materials affect the range. For increased range, use the Ruuvi Gateway router as a receiver.

App Features

Free and easy: User-friendly free app, signing in is optional.
Android and iOS.
Alerts: Configurable Bluetooth push alerts with customisable messages.
Real-time measurements: Track data in real time.
Historical data: Detailed historical graphs available for up to 10 days (offline).
History export: 10-day history export.
Dashboard: See all your sensors at a glance.
Personalise sensors: Use custom backgrounds and names.
Multilingual: Available in English, Finnish, Swedish, French, and German.


Integrations: Victron Energy, Home Assistant, Homey, and more.
Remote monitoring: When not within Bluetooth range, online remote monitoring is available with the Ruuvi Gateway and Ruuvi Cloud, both sold separately.

Technical Specifications

Data sheet: Download (pdf)
Read more info below:

You will find more use cases below