Apple iPhone 4G - Manual (Page 147)

Switch to another city: Flick left or right, or tap to the left or right of the row of dots.
The number of dots below the weather board shows how many cities are stored.
Reorder cities: Tap , then drag next to a city to a new place in the list.
Delete a city: Tap and tap next to a city, then tap Delete.
Display the 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
.
147 Chapter 16 Weather