How will today or tomorrow FEEL compared to 24 hours ago?

Thermo Diem provides 7 simple outputs throughout the day:

- Much Warmer
- Warmer
- Slightly Warmer
- Similar
- Slightly Cooler
- Cooler
- Much Cooler

Thermo Diem will compare today's "feels like" temperature (taking into account relative humidity, wind, dew points, and temperature) and compares it to how it felt yesterday. This gives you the most accurate way to judge the way it feels outside because it's relative to how it made you feel the day before.

Designed specifically for the Apple Watch, it's one of the apps that makes sense to have on your wrist.

If you launch Thermo Diem in the evening it will get tomorrow's "feels like" temperature and compare it to today and display: "Tomorrow will be cooler than today".

Thermo Diem runs off data provided by the most accurate weather reporting service available today.

Science! The formula that determines how you'll feel:

AT = -2.7 + 1.04*T + 2.0*e -0.65*v
where AT and T (air temperature) are deg-C,
e is vapor pressure in kPa,
and v is 10m wind speed in m/sec.

What’s New

Version 2.1

Apple Watch - Glance View Updated

Ratings and Reviews

1.5 out of 5
6 Ratings

6 Ratings

iPravda ,

Poor today widget and Watch extension

The today's notification widget and the actual app info is never aligned. Meaning the today widget will say "tomorrow will feel like today" and when you open the actual app it will say "tomorrow's will feel much cooler".
This happens almost every time.
Same issue with Watch extension.

Simple app like this should be in sync.

Kelsey mills ,

Not accurate

TODAY IS ALWAYS SIMILAR TO YESTERDAY. I have yet to see a difference. I live in Maryland with drastically different temperatures such as two days ago being 67 and the following day in the 30s. And "today will feel similar to yesterday". Never a change, ever. A lot of times yes today is the same forecast but often times it is 20-30 degrees warmer or colder and no change. Hate this app. It's useless.

Lindsbear19 ,

apparently 90 is cooler than 78

For a while this app would always say “today is warmer” I kind of forgot about it until a couple days ago. The high was 78. The next day was in the mid 90s, yet the app kept saying “today is cooler”


Mickey DeLorenzo
10.7 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
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  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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