A simple weather skin, using large, clean text.
The "Today" forecast automatically switches to "Tonight" after 3pm, along with the temperature, which switches from the day's high to the day's low.
Update (23 May 2010): Fixed bug in which longer text descriptions were getting truncated
Update (21 January 2014): Updated skin to account for change in the way that weather.com reports temperatures
Update (13 February 2014): Updated skin, again, to account for change in the way that weather.com reports temperatures
Update (17 March 2014): Updated skin, again, to fix weather.com's feed change that messed up my Today to Tonight changeover