SwitchBot IP65 Indoor Outdoor Hygrometer Thermometer Wireless, 100m Bluetooth Range, Refrigerator Thermometer, Dewpoint/VPD/Absolute Humidity Sensor, Free Data Storage Export, 2 Years Battery Life

I have tried a few Bluetooth weather devices, and this Switchbot is the cheapest and best. Physically, its advantages over similar devices are that it uses standard batteries (2xAAA, supplied) rather than a semi-random button battery, and that it is visibly waterproof - it is a smooth white plastic box and the battery compartment lid has a seal round it. Also, the nylon hanging loop is as new after 18 months outside and is better than a hole in the back meant to go over a hook or a nail. I was surprised, for such a cheap device, to find that it supports firmware updates, as there was a notification in the app on the first Bluetooth LE connection. It updated in a couple of minutes from v0.4 to v0.5 - an odd version number for a released product - and, as is almost always the case now, there was nothing stating what the update fixed or improved. But the facility is important. In fact, there were four firmware updates in the first three months and it is now at v0.9. The app is also updated every few weeks, and there is the option to try out beta versions. The Bluetooth signal is evidently good, and not entirely line of sight - I can transfer data into the app from a room about 60 feet away with the device slightly hidden round a corner of the house. Caching is well implemented and only new readings are transferred unless you explicitly clear the cache from within the app; this greatly speeds up everything as the device quickly accumulates thousands of readings. When I got a new phone it took 20 minutes to transfer all the readings. Its accuracy is better than that of my old Bresser weather station, which cost several times as much but badly underestimated temperatures. Apparently it uses the same chipset as my now defunct LIORQUE weather station (also reviewed) and the values it returns are generally almost identical. Another Switchbot advantage, although it gets oddly low ratings in Google Play, is the app. It looks good unlike many similar apps, is simple to set up and use, and data export is easy - select a date range and readings are exported to a comma separated values file in a defined time step. Exporting a reading every minute gives a huge 1.7MB/month file, but exporting a reading every half hour amounts to 50KB/month. I can produce graphs very easily from the exported file - the large graph follows an import into Excel 2024 with no further changes (!) and the other two graphs show what Switchbot can display using its own facilities. ChatGPT can run riot with the exported files. The battery level remained at 100% for a long time and is 67% after 15 months so, if the app is reporting the level accurately, the batteries will probably last for about the two years advertised. The Switchbot is an excellent data gatherer. If it could record barometric pressure as well as temperature and humidity, it would replace everything weather-related here. I use a second (ancient) Android phone to provide a semi-permanent display. A minor issue is that the instructions state that the temperature sensor is good to -20C, but the device is recommended only to be used at 5C or greater. It has been down to -6C, with whole days below 5C, and I have noted two missed readings in four months, which were both when the temperature was well above 0C. Most impressive was that I discovered a bug when exporting. I raised a ticket in the app; there was a comment back about three days later that it was being "escalated to senior technical staff", then after six days there was a fix available in Google Play! That speed of response is otherwise unheard of in my experience, where technical comments are often not even acknowledged. Having had two other weather stations fail during the bad weather (huge temperature and humidity fluctuations) in January 2026, I am going to extend my Switchbot "estate" as the good build quality mentioned in the second paragraph matters ... a lot. It was the only survivor. £15 (£11 with a coupon) is an absolute steal for something which would have cost many times that a few years ago for the same functionality and would certainly have been less robust.

I have been using these as thermometers in a campervan fridge to monitor the temperatures as there was no gauge on the fridge. They were very easy to install using the velcro strips provided and the app has been very useful in accessing the data without having to open the fridge up to take readings. I'm now using the sensors through a Raspberry Pi using Home Assistant and they have been very reliable and it means I can read the data from anywhere (I think you can do similar with the switchbot hub but I had the RPi sitting around!). Overall I have been very impressed the build quality is very good and the temperature readings seem accurate when testing in a domestic fridge as comparison.

For me, this is a 5* product. I’ll get into why after I explain the 4*. One of the indoor / outdoor sensors in my pack of three unfortunately failed its firmware update out of the box and became bricked. Thankfully, support have been amazing and sending me a replacement. The process was little hassle. That being said, I feel out of principle I cannot give a 5* right now. The product itself is brilliant. Compact (actually smaller than I was expecting), which makes it unobtrusive and good to put in tighter spots or even inside things (a terrarium for example). Connectivity is excellent. No hub or even an app are needed for this, you can hook it straight into home assistant over bluetooth. However, the switchbot app is great and has a lot of useful functionality. One of my favourite things about this is that you can just use it or take it with you anywhere and check temp and humidity on your phone. I’m a bit of a data nerd so i’ve taken it to all sorts of different places in the short time i’ve had it. Accuracy is hard to gauge without a benchmark I know is 100%, which i don’t have. But I believe they are very accurate, and did my research before hand to make sure they would be. Having a number of these sensors, they seem to agree strongly with one another. Which is reassuring. The one thing I will mention, is that their time to adapt to a drastic change in temperature +-20 celsius is quite long. Perhaps 20 mins or maybe a bit more. This is no issue, as the accuracy is stellar. But for some others this may be a concern. Overall, i’d highly recommend these.

We were getting worried about humidity levels in our house, after having some issues with mould, so invested in the pack of three of these sensors that came with a handy hub that meant we could monitor them through the Internet on our phones. The sensors and hub were easy to set up. Wireless range wasn't too bad and the hub has been placed in a central location where it can reach all of them. The app works well and has allowed us to monitor the humidity in the loft and a couple of other rooms in the house. It's allowed us to track the effectiveness of various approaches to improve ventilation and we've since invested in some decent dehumidifiers to keep moisture levels down in problem spots. Given how relatively cheap and easy these were to set up, I think it would be very easy to go down the whole rabbit hole of home automation. I'm tempted to buy a couple of more sensors to expand the system.

I’ve used these temperature and humidity sensors in my beehives to assess colony wellbeing during colder seasons and improve their chances of over wintering Their size fits the crown board cutouts and are shallow enough to fit under the roof The app is simple to setup and connect to the sensors and downloads of data work without any issues Data graphs show daily patterns and can be switched to weekly or monthly for comparison Very good value for money and included AAA batteries should last 2 years before needing replacement

Have a few of these units now set up around my home connected to a hub - very easy to set up, connects very easily. App is simple to use and the data records excellent. Not had any problems with signals despite all being well spread out. Units firmware has been updated a few times - good to see it’s still being supported.

This is fine when it works but I find connection very hit and miss. Sometimes it connects and downloads smoothly, sometimes it takes repeated attempts and this is all direct line of sight, less than 10 metres away. Charts you get in the app are good/interesting, I like being able to track the variations in temperature over a day/week/month. It presents some temperatures incorrectly though, eg if it's +0.9 degrees, ie above freezing, it states it as -0.9 degrees whilst the chart very clearly shows it's +0.9. In summary I'm glad I only bought the one sensor rather than the triple pack I nearly did.

Accurate, weatherproof, and easy to use. It delivers precise temperature and humidity readings with long battery life. IP65 design makes it reliable in rain or snow, and with the SwitchBot Hub you get smart alerts and cloud storage. Perfect for gardens, patios, or greenhouses.