Willing WebCam has a feature that will add text from a file to the web camera image.

I created a new HTX template file for WeatherLink and included the date, time, temperature, wind speed and daily rain weather tags along with a title.  Then I created another Data Upload Profile but one that updated every 1 minute to match the daily time-lapse settings.  I changed the file extension to be TXT.  I also had to enable Local Transfer so the file would be stored on the hard drive.

In Willing WebCam, I went to the Text Caption and enabled the Text to File and linked to the camera.txt file.  I also had to turn off the Time Caption feature since it was overwriting.

I tested and everything was working fine.  Check out the results at Woicik Weather Camera.