More detailed, not necessarily more space. Use colors to show varying weather (grayed out fog area for night time). Not just ‘accordioning’ down with the hourly details.

Viewed completely in one view and absorbed subconsciously. A lot more to a day’s weather than just a sun, clouds, or rain. Could be sunny in the am, rain in the early afternoon, and clear in the evening. This needs to be shown (example, iPhone going to hourly. This takes up too much space).

Show the amount of precipitation (weighted based on probability of precipitation 40% x 1 in = 0.40 inches of snow)

Show weather in color bands. Either vertically or horizontally. Kuler colors, maybe five colors

Sunny
Cloudy
Raining
Snowing
Mixed precip
(amount of precipitation weighted).

Windy
Hazardous

Temperature: Just show the highs and low.