I made a version of the forecaswatch2 watchface that runs as an app, so you can interact with it and have different info. I found that binding the app to a quicklaunch button helps it feel like a seamless feature of the FCW2 face. Features are:

Top screen shows extra weather info, such as wind speed and direction, moon phase, humidity, pollen info (need a key from google cloud maps pollen, otherwise shows barometer), second screen shows personal weather station from wunderground via ID entered in settings screen.

Bottom screen shows 48 hour extended forecast with wind line in yellow thanks to cdlenfert on a branch of the original face that has not been implemented there yet. 2nd screen shows 7 day high and low temps with rain chances as bars beside.

Middle screen shows time with seconds, or zulu time.

Side buttons toggle corresponding screens, as well as touching the top and bottom screen. Holding middle button forces a weather fetch. Last sync shown below clock, will auto sync if older than 10 minutes or location has moved more than 5k.

App times out after 30 seconds of interactivity (minus touch screen) and exits back to watchface.

Stays open when settings screen is open on phone.

All credit to mattrossman for building original watchface, all this was based on forecaswatch2, using google antigravity to code additional features mentioned.