Mytemp - Comfort Temperature Log
Mytemp is a small log for a question most people answer by guesswork: at what temperature do I actually feel comfortable? Each time you notice the temperature, you type the reading, say whether you are indoors or outdoors, and tap how it feels: hot, comfortable or cold. After a handful of entries the app shows the temperature you most often call comfortable and the range around it.
It is useful when you share a thermostat and want something better than "I'm freezing" to settle the setting, when you are choosing what to wear for a commute, or when you suspect your comfort shifts between morning and evening. Optional humidity notes help if muggy days bother you more than the number on the thermometer suggests.
There is no account and no sign-up. Every record stays in the browser on your device.
The app runs entirely in your browser. What you enter is saved only on this device.
How to use Mytemp
- Enter the temperature. On the Record tab, type the current temperature in degrees Celsius. Use a room thermometer, a smart thermostat or a weather report for outdoor readings.
- Choose indoor or outdoor. Tap Indoor or Outdoor so you can later tell apart how a room feels from how the weather feels.
- Pick how it feels. Select Hot, Comfortable or Cold, then press Record. A short confirmation appears and the record counter at the top goes up by one.
- Add humidity if you want. Open the gear icon at the top right and turn on Record Humidity Too. A humidity (%) field then appears on the Record tab. Leave it empty whenever you do not know the value.
- Review your history. The History tab lists every entry with time, environment and humidity. Filter by today, this week or this month, by environment or by time of day, switch between newest and oldest first, and swipe an entry sideways to delete it.
- Read the analysis. The Analysis tab has three views: Basic Analysis with your comfortable temperature and range plus a temperature-versus-feeling chart, Time of Day Analysis for morning, noon, evening and night, and Comparison, which sets yesterday against last week and last month.
Features
- Quick entry: temperature in °C, indoor or outdoor, and hot, comfortable or cold
- Optional humidity field, switched on in settings
- Your comfortable temperature and comfortable range, calculated from your own records
- Bar chart of how each temperature felt to you
- Comfortable temperature by time of day (morning, noon, evening, night)
- Comparison of yesterday, last week and last month
- History with date, environment and time-of-day filters, sorting and swipe-to-delete
- Dark mode; no account, records stay in your browser
Understanding thermal comfort
Why the thermometer is only part of the story
How warm a place feels depends on more than air temperature. Comfort researchers usually list six factors: air temperature, humidity, air movement, the temperature of surrounding surfaces such as windows and walls, how much clothing you wear, and how active you are. A room at 22 °C can feel pleasant while you sit in a sweater and stuffy while you vacuum. A draft from a single-glazed window can make the same reading feel cold.
Personal factors matter too. Body size, age, what you have eaten and how well you slept all shift your sense of warm and cool, and people who live in hot climates often judge the same temperature differently from people used to cold ones. That is why a personal log tends to be more useful than a general rule.
Typical indoor ranges
Building guidelines commonly aim for roughly 20 to 24 °C in winter clothing and 23 to 26 °C in light summer clothing, with relative humidity somewhere between about 30 and 60 percent. These are averages meant to satisfy most people in an office, not targets you must hit. Your own comfortable range may sit above or below them, and it may be narrower or wider than a colleague's.
What humidity changes
When the air is humid, sweat evaporates more slowly, so warm days feel hotter and heavier. Very dry air, common in heated rooms in winter, can make skin and eyes feel uncomfortable even at a pleasant temperature. If you notice that the same reading feels fine one day and oppressive the next, recording humidity alongside it often explains the difference.
Getting a useful log
Record at different times and in different places rather than always at the same moment. Comfort tends to drift during the day: many people feel cooler in the early morning and late at night, when the body's own temperature is lower. Note readings from the same thermometer when possible, because cheap sensors can disagree by a degree or more.
Be honest about the feeling in the moment, not what you think the number should mean. After a couple of weeks, look at where the comfortable answers cluster and where hot and cold begin to take over. That boundary is a practical starting point for setting a thermostat, choosing layers or deciding when to open a window. If you feel unusually cold or hot for no clear reason, or the feeling comes with other symptoms, talk to a doctor rather than relying on a log.
Frequently asked questions
Where are my records stored?
Only in this browser on this device, in its local storage. There is no account and nothing is sent to a server. Clearing your browser's site data, or using a private window, removes the records, and they do not move between devices or browsers.
Does Mytemp measure the temperature for me?
No. Browsers cannot read a temperature sensor, so you type the value from a thermometer, thermostat or weather report.
Can I use Fahrenheit?
The entry field and the analysis use degrees Celsius. If your thermometer shows Fahrenheit, subtract 32 and multiply by 5/9 before entering the value.
How many records do I need before the analysis means anything?
The comfortable temperature appears after your first comfortable entry, but a range based on one or two points is not very informative. A week or two of entries at different times of day gives a much clearer picture. The Comparison view needs at least two records.
What is different from the phone app?
The iPhone and Android app can send a daily reminder notification to record how you feel. The web version cannot send reminders, so you need to open the page yourself. Records also do not sync between the web version and the phone app.
How do I delete a mistaken entry?
Open the History tab and swipe the entry from right to left. It is removed from the list and from the analysis straight away.
Limitations of the web version
- No daily reminder notifications on the web
- Temperatures are entered by hand in °C; nothing is measured automatically
- Records are kept only in this browser and are not synced with the phone app or other devices
Phone app
Mytemp is also available as an app for phones and tablets: