Hi lettice
I use an IP camera, then use IPTimelapse software (paid) to connect to the camera. It has tons of settings and features, such as adding your wunderground weather to the overlay. I just set it to capture an image every 15 seconds between 00:00 and 11:59, it then creates the video for it at midnight, and automatically uploads it to my site.
It took a while for the sun to make an appearance here today, but now it has, it pushed the temp to 15.5°C
Temp: 14.6°C - Hum: 59% - Dew: 6.6°C - Bar: 1011.32hPa - Wind: SSE @ 10mph.
If anybody accesses my site, either give your cookies a clear, or CTRL +F5 to bypass your cache. I updated the colours and font today, due to some a-hole copying everything from my site, to his.