Apple iPhone OS 3.1 - Manual (Page 124)

Delete a city: Tap and tap next to a city, then tap Delete.
Display temperature in Fahrenheit or Celsius: Tap , then tap °F or °C.
Getting More Weather Information
You can see a more detailed weather report, news and websites related to the city,
and more.
See information about a city at Yahoo.com: Tap
.
124 Chapter 14 Weather